M95256-MN3/A datasheet, PDF - EEWORLD Datasheet

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M95256-MN3/A: Description32K X 8 SPI BUS SERIAL EEPROM, PDSO8; Categorystorage storage; File Size206KB，42 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/

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M95256-MN3/A Overview

32K X 8 SPI BUS SERIAL EEPROM, PDSO8

M95256-MN3/A Parametric

Parameter Name	Attribute value
Maker	STMicroelectronics
Parts packaging code	SOIC
package instruction	SOP,
Contacts	8
Reach Compliance Code	unknow
ECCN code	EAR99
Maximum clock frequency (fCLK)	5 MHz
JESD-30 code	R-PDSO-G8
length	4.9 mm
memory density	262144 bi
Memory IC Type	EEPROM
memory width	8
Number of functions	1
Number of terminals	8
word count	32768 words
character code	32000
Operating mode	SYNCHRONOUS
Maximum operating temperature	125 °C
Minimum operating temperature	-40 °C
organize	32KX8
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Parallel/Serial	SERIAL
Certification status	Not Qualified
Maximum seat height	1.75 mm
Serial bus type	SPI
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	4.5 V
Nominal supply voltage (Vsup)	5 V
surface mount	YES
technology	CMOS
Temperature level	AUTOMOTIVE
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
width	3.9 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

Feature summary

■

Compatible with SPI Bus Serial Interface

(Positive Clock SPI Modes)

Single Supply Voltage:

– 4.5 to 5.5V for M95256

– 2.5 to 5.5V for M95256-W

– 1.8 to 5.5V for M95256-R

High Speed

– 10MHz Clock Rate, 5ms 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

■

April 2006

Rev 6

1/42

www.st.com

Contents

M95256, M95256-W, M95256-R

Contents

Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

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

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

3.1

3.2

3.3

3.4

3.5

3.6

3.7

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

Supply voltage (V

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

3.7.1

3.7.2

3.7.3

3.7.4

Operating supply voltage V

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

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

Internal device reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

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

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

4.1

4.2

4.3

Hold Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Data Protection and Protocol Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.1

5.2

5.3

Write Enable (WREN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Write Disable (WRDI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Read Status Register (RDSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.3.1

5.3.2

5.3.3

5.3.4

WIP bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

WEL bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

BP1, BP0 bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

SRWD bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.4

5.5

5.6

Write Status Register (WRSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Read from Memory Array (READ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Write to Memory Array (WRITE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2/42

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Instruction Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Status Register Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Protection Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Operating Conditions (M95256) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Operating Conditions (M95256-W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Operating Conditions (M95256-R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

AC Measurement Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

DC Characteristics (M95256, Device Grade 6). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

DC Characteristics (M95256, Device Grade 3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

DC Characteristics (M95256-W, Device Grade 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

DC Characteristics (M95256-W, Device Grade 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

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

AC Characteristics (M95256, Device Grade 6). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

AC Characteristics (M95256, Device Grade 3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

AC Characteristics (M95256-W, Device Grade 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

AC Characteristics (M95256-W, Device Grade 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

AC Characteristics (M95256-R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

SO8 narrow – 8 lead Plastic Small Outline, 150 mils body width, Package

Mechanical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

SO8 wide – 8 lead Plastic Small Outline, 200 mils body width, Package

Mechanical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

TSSOP8 – 8 lead Thin Shrink Small Outline, Package Mechanical Data. . . . . . . . . . . . . . 39

Ordering Information Scheme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4/42

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.

Logic Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

SO and TSSOP Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Hold Condition Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Write Enable (WREN) Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Write Disable (WRDI) Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

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

Write Status Register (WRSR) Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Read from Memory Array (READ) Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Byte Write (WRITE) Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Page Write (WRITE) Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Bus Master and Memory Devices on the SPI Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

SPI Modes Supported. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

AC Measurement I/O Waveform. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Serial Input Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Hold Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Output Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

SO8 narrow – 8 lead Plastic Small Outline, 150 mils body width, Package Outline . . . . . . 37

SO8 wide – 8 lead Plastic Small Outline, 200 mils body width, Package Outline. . . . . . . . 38

TSSOP8 – 8 lead Thin Shrink Small Outline, Package Outline . . . . . . . . . . . . . . . . . . . . . 39

5/42

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