NAND256W3A3AN6F datasheet, PDF

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NAND256W3A3AN6F: DescriptionFlash, 32MX8, 10000ns, PDSO48, 12 X 20 MM, LEAD FREE, PLASTIC, TSOP-48; Categorystorage storage; File Size883KB，56 Pages; ManufacturerNumonyx ( Micron ); Websitehttps://www.micron.com; Environmental Compliance

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NAND256W3A3AN6F Overview

Flash, 32MX8, 10000ns, PDSO48, 12 X 20 MM, LEAD FREE, PLASTIC, TSOP-48

NAND256W3A3AN6F Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Maker	Numonyx ( Micron )
Parts packaging code	TSOP
package instruction	TSOP1,
Contacts	48
Reach Compliance Code	unknown
ECCN code	3A991.B.1.A
Maximum access time	10000 ns
JESD-30 code	R-PDSO-G48
length	18.4 mm
memory density	268435456 bit
Memory IC Type	FLASH
memory width	8
Number of functions	1
Number of terminals	48
word count	33554432 words
character code	32000000
Operating mode	ASYNCHRONOUS
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
organize	32MX8
Package body material	PLASTIC/EPOXY
encapsulated code	TSOP1
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE
Parallel/Serial	PARALLEL
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
Programming voltage	3 V
Certification status	Not Qualified
Maximum seat height	1.2 mm
Maximum supply voltage (Vsup)	3.6 V
Minimum supply voltage (Vsup)	2.7 V
Nominal supply voltage (Vsup)	3 V
surface mount	YES
technology	CMOS
Temperature level	INDUSTRIAL
Terminal form	GULL WING
Terminal pitch	0.5 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	12 mm

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NAND128-A, NAND256-A

NAND512-A, NAND01G-A

128 Mbit, 256 Mbit, 512 Mbit, 1 Gbit (x8/x16)

528 Byte/264 Word Page, 1.8V/3V, NAND Flash Memories

PRELIMINARY DATA

FEATURES SUMMARY

■

HIGH DENSITY NAND FLASH MEMORIES

– Up to 1 Gbit memory array

– Up to 32 Mbit spare area

– Cost effective solutions for mass storage

applications

NAND INTERFACE

– x8 or x16 bus width

– Multiplexed Address/ Data

– Pinout compatibility for all densities

SUPPLY VOLTAGE

– 1.8V device: V

= 1.7 to 1.95V

– 3.0V device: V

= 2.7 to 3.6V

PAGE SIZE

– x8 device: (512 + 16 spare) Bytes

– x16 device: (256 + 8 spare) Words

BLOCK SIZE

– x8 device: (16K + 512 spare) Bytes

– x16 device: (8K + 256 spare) Words

PAGE READ / PROGRAM

– Random access: 12µs (max)

– Sequential access: 50ns (min)

– Page program time: 200µs (typ)

COPY BACK PROGRAM MODE

– Fast page copy without external buffering

FAST BLOCK ERASE

– Block erase time: 2ms (Typ)

STATUS REGISTER

ELECTRONIC SIGNATURE

CHIP ENABLE ‘DON’T CARE’ OPTION

– Simple interface with microcontroller

AUTOMATIC PAGE 0 READ AT POWER-UP

OPTION

– Boot from NAND support

– Automatic Memory Download

SERIAL NUMBER OPTION

Figure 1. Packages

TSOP48 12 x 20mm

WSOP48 12 x 17 x 0.65mm

FBGA

VFBGA55 8 x 10 x 1mm

TFBGA55 8 x 10 x 1.2mm

VFBGA63 8.5 x 15 x 1mm

TFBGA63 8.5 x 15 x 1.2mm

■

HARDWARE DATA PROTECTION

– Program/Erase locked during Power

transitions

DATA INTEGRITY

– 100,000 Program/Erase cycles

– 10 years Data Retention

DEVELOPMENT TOOLS

– Error Correction Code software and

hardware models

– Bad Blocks Management and Wear

Leveling algorithms

– PC Demo board with simulation software

– File System OS Native reference software

– Hardware simulation models

July 2004

1/56

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

NAND128-A, NAND256-A, NAND512-A, NAND01G-A

TABLE OF CONTENTS

FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 1. Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Table 1. Product List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

SUMMARY DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Table 2.

Figure 2.

Table 3.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Figure 7.

Figure 8.

Figure 9.

Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Logic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Logic Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

TSOP48 and WSOP48 Connections, x8 devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

TSOP48 and WSOP48 Connections, x16 devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

FBGA55 Connections, x8 devices (Top view through package) . . . . . . . . . . . . . . . . . . . 11

FBGA55 Connections, x16 devices (Top view through package) . . . . . . . . . . . . . . . . . . 12

FBGA63 Connections, x8 devices (Top view through package) . . . . . . . . . . . . . . . . . . . 13

FBGA63 Connections, x16 devices (Top view through package) . . . . . . . . . . . . . . . . . . 14

MEMORY ARRAY ORGANIZATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Bad Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Table 4. Valid Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 10.Memory Array Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

SIGNAL DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Inputs/Outputs (I/O0-I/O7). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Inputs/Outputs (I/O8-I/O15). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Address Latch Enable (AL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Command Latch Enable (CL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Chip Enable (E). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Read Enable (R). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Write Enable (W). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Write Protect (WP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Ready/Busy (RB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

BUS OPERATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Command Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Address Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Data Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Data Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Write Protect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Standby . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Table 5. Bus Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Table 6. Address Insertion, x8 Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3/56

NAND128-A, NAND256-A, NAND512-A, NAND01G-A

Table 7. Address Insertion, x16 Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 8. Address Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

COMMAND SET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 9. Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

DEVICE OPERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Pointer Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 11.Pointer Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 12.Pointer Operations for Programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Read Memory Array. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Random Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Page Read. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Sequential Row Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 13.Read (A,B,C) Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 14.Read Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 15.Sequential Row Read Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 16.Sequential Row Read Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Page Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 17.Page Program Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Copy Back Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 10. Copy Back Program Addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 18.Copy Back Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Block Erase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 19.Block Erase Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Read Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Write Protection Bit (SR7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

P/E/R Controller Bit (SR6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Error Bit (SR0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

SR5, SR4, SR3, SR2 and SR1 are Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 11. Status Register Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Read Electronic Signature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 12. Electronic Signature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Automatic Page 0 Read at Power-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Automatic Page 0 Read Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Chip Enable Don’t Care Enabled. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Chip Enable Don’t Care Disabled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 20.Chip Enable Don’t Care Enabled and Automatic Page 0 Read at Power-Up . . . . . . . . . 28

Figure 21.Automatic Page 0 Read at Power-Up (Chip Enable Don’t Care Disabled) . . . . . . . . . . . 29

SOFTWARE ALGORITHMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Bad Block Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Block Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 13. Block Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 22.Bad Block Management Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4/56

NAND128-A, NAND256-A, NAND512-A, NAND01G-A

Figure 23.Garbage Collection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Garbage Collection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Wear-leveling Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Error Correction Code. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 24.Error Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Hardware Simulation Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Behavioral simulation models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

IBIS simulations models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

PROGRAM AND ERASE TIMES AND ENDURANCE CYCLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table 14. Program, Erase Times and Program Erase Endurance Cycles . . . . . . . . . . . . . . . . . . . 32

MAXIMUM RATING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table 15. Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

DC and AC PARAMETERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 16. Operating and AC Measurement Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 17. Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 18. DC Characteristics, 1.8V Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 19. DC Characteristics, 3V Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Table 20. AC Characteristics for Command, Address, Data Input . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 21. AC Characteristics for Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 25.Command Latch AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 26.Address Latch AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 27.Data Input Latch AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 28.Sequential Data Output after Read AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 29.Read Status Register AC Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 30.Read Electronic Signature AC Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 31.Page Read A/ Read B Operation AC Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 32.Read C Operation, One Page AC Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 33.Page Program AC Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 34.Block Erase AC Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 35.Reset AC Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Ready/Busy Signal Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 36.Ready/Busy AC Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 37.Ready/Busy Load Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 38.Resistor Value Versus Waveform Timings For Ready/Busy Signal . . . . . . . . . . . . . . . . 45

PACKAGE MECHANICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Figure 39.TSOP48 - 48 lead Plastic Thin Small Outline, 12 x 20mm, Package Outline . . . . . . . . . 46

Table 22. TSOP48 - 48 lead Plastic Thin Small Outline, 12 x 20mm, Package Mechanical Data . 46

Figure 40.WSOP48 – 48 lead Plastic Very Very Thin Small Outline, 12 x 17mm, Package Outline47

Table 23. WSOP48 lead Plastic Very Very Thin Small Outline, 12 x 17mm, Mechanical Data. . . . 47

Figure 41.VFBGA55 8 x 10mm - 6x8 active ball array, 0.80mm pitch, Package Outline . . . . . . . . 48

Table 24. VFBGA55 8 x 10mm - 6x8 active ball array, 0.80mm pitch, Package Mechanical Data . 48

Figure 42.TFBGA55 8 x 10mm - 6x8 active ball array - 0.80mm pitch, Package Outline . . . . . . . . 49

5/56

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