M24256-BFDW6TP/K datasheet, PDF

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M24256-BFDW6TP/K: Description32KX8 I2C/2-WIRE SERIAL EEPROM, PDSO8, ROHS COMPLIANT, TSSOP-8; Categorystorage storage; File Size469KB，41 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/; Environmental Compliance

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M24256-BFDW6TP/K Overview

32KX8 I2C/2-WIRE SERIAL EEPROM, PDSO8, ROHS COMPLIANT, TSSOP-8

M24256-BFDW6TP/K Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Parts packaging code	SOIC
package instruction	ROHS COMPLIANT, TSSOP-8
Contacts	8
Reach Compliance Code	compliant
ECCN code	EAR99
Spare memory width	1
Maximum clock frequency (fCLK)	0.4 MHz
Data retention time - minimum	40
Durability	1000000 Write/Erase Cycles
I2C control byte	1010DDDR
JESD-30 code	R-PDSO-G8
JESD-609 code	e4
length	4.4 mm
memory density	262144 bit
Memory IC Type	EEPROM
memory width	8
Humidity sensitivity level	1
Number of functions	1
Number of terminals	8
word count	32768 words
character code	32000
Operating mode	SYNCHRONOUS
Maximum operating temperature	85 °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
Peak Reflow Temperature (Celsius)	260
power supply	1.8/5 V
Certification status	Not Qualified
Maximum seat height	1.2 mm
Serial bus type	I2C
Maximum standby current	0.000001 A
Maximum slew rate	0.005 mA
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	1.7 V
surface mount	YES
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	NICKEL PALLADIUM GOLD
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	10
width	3 mm
Maximum write cycle time (tWC)	5 ms
write protect	HARDWARE
Base Number Matches	1

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M24256-BF M24256-BR M24256-BW

M24256-DR

256 Kbit serial I²C bus EEPROM

with three Chip Enable lines

Features

■

Compatible with all I

C bus modes:

– 1 MHz Fast-mode Plus

– 400 kHz Fast mode

– 100 kHz Standard mode

Memory array:

– 256 Kb (32 Kbytes) of EEPROM

– Page size: 64 bytes

M24xxx- DR: additional Write lockable Page

(Identification page)

Single supply voltage:

– 1.7 V to 5.5 V

– 1.8 V to 5.5 V

– 2.5 V to 5.5 V

Noise suppression

– Schmitt trigger inputs

– Input noise filter

Write

– Byte write within 5 ms

– Page write within 5 ms

Random and sequential read modes

Write protect of the whole memory array

Enhanced ESD/latch-up protection

More than 1 million write cycles

More than 40-year data retention

Packages

– ECOPACK

2®

(RoHS compliant and

halogen-free)

UFDFPN8 (MB)

2 × 3 mm (MLP)

■

SO8 (MN)

150 mils width

■

TSSOP8 (DW)

■

WLCSP (CS)

■

July 2011

Doc ID 6757 Rev 24

1/41

www.st.com

Contents

M24256-BF, M24256-BR, M24256-BW, M24256-DR

Contents

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

Signal description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1

2.2

2.3

2.4

2.5

2.6

Serial Clock (SCL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Serial Data (SDA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Chip Enable (E0, E1, E2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Write Control (WC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Supply voltage (V

) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.6.1

2.6.2

2.6.3

2.6.4

Operating supply voltage V

CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Power-up conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Device reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Power-down conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Device operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.1

3.2

3.3

3.4

3.5

3.6

3.7

3.8

3.9

3.10

3.11

3.12

3.13

3.14

3.15

3.16

3.17

Start condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Stop condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Acknowledge bit (ACK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Data input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Addressing the memory array . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Write operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Byte Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Page Write (memory array) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Write Identification Page (M24256-D only) . . . . . . . . . . . . . . . . . . . . . . . . 16

Lock Identification Page (M24256-D only) . . . . . . . . . . . . . . . . . . . . . . . . 16

ECC (error correction code) and write cycling . . . . . . . . . . . . . . . . . . . . . 16

Minimizing system delays by polling on ACK . . . . . . . . . . . . . . . . . . . . . . 18

Read operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Random Address Read (in memory array) . . . . . . . . . . . . . . . . . . . . . . . . 19

Current Address Read (in memory array) . . . . . . . . . . . . . . . . . . . . . . . . 20

Sequential Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Reading the Identification Page (M24256-D only) . . . . . . . . . . . . . . . . . . 20

2/41

Doc ID 6757 Rev 24

List of tables

M24256-BF, M24256-BR, M24256-BW, M24256-DR

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.

Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Most significant address byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Least significant address byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Device select code (for memory array) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Operating conditions (voltage range W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Operating conditions (voltage range R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Operating conditions (voltage range F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

AC test measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Input parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Memory cell characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

DC characteristics (voltage range W, device grade 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

DC characteristics (voltage range W, device grade 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

DC characteristics (voltage range R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

DC characteristics (voltage range F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

400 kHz AC characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

1 MHz AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

SO8N – 8-lead plastic small outline, 150 mils body width, package mechanical data . . . . 31

TSSOP8 – 8-lead thin shrink small outline, package mechanical data. . . . . . . . . . . . . . . . 32

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

2 x 3 mm, data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

WLCSP 0.5 mm pitch, package mechanical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

4/41

Doc ID 6757 Rev 24

M24256-BF, M24256-BR, M24256-BW, M24256-DR

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.

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

Package connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

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

Device select code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

C Fast mode (f

= 400 kHz): maximum R

bus

value versus

bus parasitic capacitance (C

bus

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

I C Fast mode Plus (f

= 1 MHz): maximum R

bus

value versus

bus parasitic capacitance (C

bus

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

I C bus protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Write mode sequences with WC = 1 (data write inhibited) . . . . . . . . . . . . . . . . . . . . . . . . . 14

Write mode sequences with WC = 0 (data write enabled) . . . . . . . . . . . . . . . . . . . . . . . . . 17

Write cycle polling flowchart using ACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Read mode sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

AC test measurement I/O waveform. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

SO8N – 8-lead plastic small outline, 150 mils body width, package outline . . . . . . . . . . . . 31

TSSOP8 – 8-lead thin shrink small outline, package outline . . . . . . . . . . . . . . . . . . . . . . . 32

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

2 x 3 mm, outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

WLCSP, 0.5 mm pitch, package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Doc ID 6757 Rev 24

5/41

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Shortcut: A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF AG AH AI AJ AK AL AM AN AO AP AQ AR AS AT AU AV AW AX AY AZ B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF BG BH BI BJ BK BL BM BN BO BP BQ BR BS BT BU BV BW BX BY BZ C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF CG CH CI CJ CK CL CM CN CO CP CQ CR CS CT CU CV CW CX CY CZ D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF DG DH DI DJ DK DL DM DN DO DP DQ DR DS DT DU DV DW DX DZ

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