M24256-A
M24256-A is 256 Kbit Serial I C Bus EEPROM With Two Chip Enable Lines manufactured by STMicroelectronics.
DESCRIPTION
These I 2C-patible electrically erasable programmable memory (EEPROM) devices are organized as 32Kx8 bits, and operate down to 2.5 V (for the M24256-AW), and down to 1.8 V (for the M24256-AR). The M24256-A is available in Plastic Dual-in-Line, Plastic Small Outline and Thin Shrink Small Outline packages. The M24256-A is also available in a chip-scale (SBGA) package.
Figure 1. Logic Diagram
2 E0-E1
Table 1. Signal Names
E0, E1 SDA SCL WC VCC VSS Chip Enable Serial Data Serial Clock Write Control Supply Voltage Ground
SDA M24256-A
SCL WC
AI02271C
April 2000
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
1/20
Figure 2A. DIP Connections Figure 2C. TSSOP Connections
M24256-A M24256-A E0 E1 NC VSS 1 2 3 4 8 7 6 5
AI02273C
VCC WC SCL SDA
E0 E1 NC NC NC NC VSS
1 2 3 4 5 6 7
14 13 12 11 10 9 8
AI02388C
VCC WC NC NC NC SCL SDA
Note: 1. NC = Not Connected
Note: 1. NC = Not Connected
Figure 2B. SO Connections
Figure 2D. SBGA Connections (top view)
WC S1
M24256-A E0 E1 NC VSS 1 2 3 4 8 7 6 5
AI02272C
VCC WC SCL SDA
S0
AI03760
Note: 1. NC = Not Connected
Table 2. Absolute Maximum Ratings 1
Symbol TA T STG TLEAD VIO VCC VESD Parameter Ambient Operating Temperature Storage Temperature Lead Temperature during Soldering Input or Output range Supply Voltage Electrostatic Discharge Voltage (Human Body model) 2 Electrostatic Discharge Voltage (Machine model) 3 PSDIP8: 10 sec SO8: 40 sec TSSOP14: t.b.c....
