M95256WCS3G datasheet, PDF - EEWORLD Datasheet

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M95256WCS3G: Description32 X 8 SPI BUS SERIAL EEPROM, 80 ns, PDSO8; Categorystorage storage; File Size246KB，44 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/; Environmental Compliance

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M95256WCS3G Overview

32 X 8 SPI BUS SERIAL EEPROM, 80 ns, PDSO8

M95256WCS3G Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	STMicroelectronics
Parts packaging code	BGA
package instruction	0.50 MM PITCH, HALOGEN FREE AND ROHS COMPLIANT, WLCSP-8
Contacts	8
Reach Compliance Code	compli
ECCN code	EAR99
Maximum access time	60 ns
Maximum clock frequency (fCLK)	5 MHz
JESD-30 code	R-PBGA-B8
length	1.97 mm
memory density	256 bi
Memory IC Type	EEPROM
memory width	8
Number of functions	1
Number of terminals	8
word count	32 words
character code	32
Operating mode	SYNCHRONOUS
Maximum operating temperature	125 °C
Minimum operating temperature	-40 °C
organize	32X8
Package body material	PLASTIC/EPOXY
encapsulated code	VFBGA
Package shape	RECTANGULAR
Package form	GRID ARRAY, VERY THIN PROFILE, FINE PITCH
Parallel/Serial	SERIAL
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
Maximum seat height	0.65 mm
Serial bus type	SPI
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	2.5 V
surface mount	YES
technology	CMOS
Temperature level	AUTOMOTIVE
Terminal form	BALL
Terminal pitch	0.5 mm
Terminal location	BOTTOM
Maximum time at peak reflow temperature	NOT SPECIFIED
width	1.785 mm
Maximum write cycle time (tWC)	5 ms

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M95256

M95256-W M95256-R

256 Kbit serial SPI bus EEPROM

with high-speed clock

Features

■

Compatible with SPI bus serial interface

(positive clock SPI modes)

Single supply voltage:

– 4.5 to 5.5 V for M95256

– 2.5 to 5.5 V for M95256-W

– 1.8 to 5.5 V for M95256-R

High speed

– 5 MHz clock rate, 5 ms write time

Status Register

Hardware protection of the Status Register

Byte and Page Write (up to 64 bytes)

Self-timed programming cycle

Adjustable size read-only EEPROM area

Enhanced ESD protection

More than 1 000 000 write cycles

More than 40-year data retention

Packages

– ECOPACK

(RoHS compliant)

TSSOP8 (DW)

169 mil width

SO8 (MW)

200 mil width

SO8 (MN)

150 mil width

■

WLCSP (CS)

July 2008

Rev 9

1/44

www.st.com

Contents

M95256, M95256-W, M95256-R

Contents

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Memory organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Signal description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.1

3.2

3.3

3.4

3.5

3.6

3.7

3.8

Serial Data output (Q) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Serial Data input (D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Serial Clock (C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Chip Select (S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Hold (HOLD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Write Protect (W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Supply voltage (V

) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.8.1

3.8.2

3.8.3

3.8.4

Operating supply voltage V

CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Power-up conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Device Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Power-down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Operating features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.1

4.2

4.3

Hold condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Data protection and protocol control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.1

5.2

5.3

Write Enable (WREN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Write Disable (WRDI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Read Status Register (RDSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.3.1

5.3.2

5.3.3

5.3.4

WIP bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

WEL bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

BP1, BP0 bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

SRWD bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.4

5.5

Write Status Register (WRSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Read from Memory Array (READ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2/44

List of tables

M95256, M95256-W, M95256-R

List of tables

Table 1.

Table 2.

Table 3.

Table 4.

Table 5.

Table 6.

Table 7.

Table 8.

Table 9.

Table 10.

Table 11.

Table 12.

Table 13.

Table 14.

Table 15.

Table 16.

Table 17.

Table 18.

Table 19.

Table 20.

Table 21.

Table 22.

Table 23.

Table 24.

Table 25.

Table 26.

Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Write-protected block size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Instruction set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Status Register format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Protection modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Operating conditions (M95256) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Operating conditions (M95256-W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Operating conditions (M95256-R). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

AC measurement conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

DC characteristics (M95256, device grade 3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

DC characteristics (M95256-W, device grade 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

DC characteristics (M95256-W, device grade 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

DC characteristics (M95256-R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

AC characteristics (M95256, device grade 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

AC characteristics (M95256-W, device grade 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

AC characteristics (M95256-W, device grade 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

AC characteristics (M95256-R). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

SO8N – 8 lead plastic small outline, 150 mils body width, package data . . . . . . . . . . . . . . 36

SO8 wide – 8 lead plastic small outline, 200 mils body width, package

mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

TSSOP8 – 8 lead thin shrink small outline, package mechanical data. . . . . . . . . . . . . . . . 38

M24256-BR WLCSP, 0.5 mm pitch, package mechanical data . . . . . . . . . . . . . . . . . . . . . 39

Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Available M95256x products (package, voltage range, temperature grade) . . . . . . . . . . . 41

Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4/44

M95256, M95256-W, M95256-R

List of figures

Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Figure 7.

Figure 8.

Figure 9.

Figure 10.

Figure 11.

Figure 12.

Figure 13.

Figure 14.

Figure 15.

Figure 16.

Figure 17.

Figure 18.

Figure 19.

Figure 20.

Figure 21.

Figure 22.

Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

SO and TSSOP connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

WLCSP connections (top view, marking side, with balls on the underside) . . . . . . . . . . . . 7

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Hold condition activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Write Enable (WREN) sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Write Disable (WRDI) sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Read Status Register (RDSR) sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Write Status Register (WRSR) sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Read from Memory Array (READ) sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Byte Write (WRITE) sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Page Write (WRITE) sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Bus master and memory devices on the SPI bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

SPI modes supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

AC measurement I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Serial input timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Hold timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Output timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

SO8N – 8 lead plastic small outline, 150 mils body width, package outline . . . . . . . . . . . . 36

SO8 wide – 8 lead plastic small outline, 200 mils body width, package outline . . . . . . . . . 37

TSSOP8 – 8 lead thin shrink small outline, package outline . . . . . . . . . . . . . . . . . . . . . . . 38

M24256-BR WLCSP, 0.5 mm pitch, package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

5/44

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