M95256-DW3TP/AB datasheet, PDF

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M95256-DW3TP/AB: DescriptionSPI BUS SERIAL EEPROM; Categorystorage storage; File Size459KB，47 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/; Environmental Compliance

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M95256-DW3TP/AB Overview

SPI BUS SERIAL EEPROM

M95256-DW3TP/AB Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	STMicroelectronics
package instruction	TSSOP, TSSOP8,.25
Reach Compliance Code	compliant
Data retention time - minimum	40
Durability	1000000 Write/Erase Cycles
JESD-30 code	R-PDSO-G8
memory density	262144 bit
Memory IC Type	EEPROM
memory width	8
Number of terminals	8
word count	32768 words
character code	32000
Maximum operating temperature	125 °C
Minimum operating temperature	-40 °C
organize	32KX8
Package body material	PLASTIC/EPOXY
encapsulated code	TSSOP
Encapsulate equivalent code	TSSOP8,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Parallel/Serial	SERIAL
power supply	3/5 V
Certification status	Not Qualified
Serial bus type	SPI
Maximum standby current	0.000005 A
Maximum slew rate	0.006 mA
surface mount	YES
technology	CMOS
Temperature level	AUTOMOTIVE
Terminal form	GULL WING
Terminal pitch	0.635 mm
Terminal location	DUAL
write protect	HARDWARE/SOFTWARE

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M95256-DR

M95256 M95256-W M95256-R

256-Kbit serial SPI bus EEPROM

with high-speed clock

Features

■

Compatible with the Serial Peripheral Interface

(SPI) bus

Memory array

– 256 Kbits (32 Kbytes) of EEPROM

– Page size: 64 bytes

Additional Write lockable Page (Identification

page)

Write (self-timed cycle)

– Byte Write within 5 ms

– Page Write within 5 ms

Write Protect: quarter, half or whole memory

array

High-speed clock frequency (20 MHz)

Single supply voltage: 1.8 V to 5.5 V

More than 1 million Write cycles

More than 40-year data retention

Enhanced ESD Protection

Packages

– ECOPACK2

(RoHS compliant and

Halogen-free)

TSSOP8 (DW)

169 mil width

■

SO8 (MN)

150 mil width

■

UFDFPN8 (MB, MC)

2 × 3 mm (MLP)

WLCSP (CS)

January 2012

Doc ID 12276 Rev 17

1/47

www.st.com

Contents

M95256-DR, 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

Operating supply voltage (V

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

3.8.1

3.8.2

3.8.3

Device reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Power-up conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.1

5.2

5.3

Write Enable (WREN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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

5.6

2/47

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

Read from Memory Array (READ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Write to Memory Array (WRITE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Doc ID 12276 Rev 17

List of tables

M95256-DR, 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.

Table 27.

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

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

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

M95256-D instruction set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

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

Protection modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Operating conditions (M95256) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Operating conditions (M95256-W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Operating conditions (M95256-R and M95256-DR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

AC measurement conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Memory cell characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

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

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

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

DC characteristics (M95256-R, M95256-DR, device grade 6) . . . . . . . . . . . . . . . . . . . . . . 32

AC characteristics (M95256, device grade 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

AC characteristics, M95256-W, device grade 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

AC characteristics (M95256-W, device grade 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

AC characteristics (M95256-DR, M95256-R device grade 6). . . . . . . . . . . . . . . . . . . . . . . 36

SO8N – 8 lead plastic small outline, 150 mils body width, package data . . . . . . . . . . . . . . 38

TSSOP8 – 8 lead thin shrink small outline, package mechanical data. . . . . . . . . . . . . . . . 39

UFDFPN8 (MLP8) 8-lead ultra thin fine pitch dual flat package no lead

2 x 3 mm, data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

M95256-DR WLCSP, 0.5 mm pitch, package mechanical data . . . . . . . . . . . . . . . . . . . . . 41

Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

4/47

Doc ID 12276 Rev 17

M95256-DR, 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.

Figure 23.

Figure 24.

Figure 25.

Figure 26.

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

8-pin package 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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

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

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

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

Byte Write (WRITE) sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Page Write (WRITE) sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Read Identification Page sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Write Identification Page sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Read Lock Status sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Lock ID sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Bus master and memory devices on the SPI bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

SPI modes supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

AC measurement I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Serial input timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Hold timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Output timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

SO8N – 8 lead plastic small outline, 150 mils body width, package outline . . . . . . . . . . . . 38

TSSOP8 – 8 lead thin shrink small outline, package outline . . . . . . . . . . . . . . . . . . . . . . . 39

UFDFPN8 (MLP8) - 8-lead ultra thin fine pitch dual flat no lead, package

outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

M95256-DR WLCSP, 0.5 mm pitch, package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Doc ID 12276 Rev 17

5/47

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