文档介绍：ST24C04, ST25C04
ST24W04, ST25W04
4 Kbit Serial I2C Bus EEPROM
with User-Defined Block Write Protection
1 MILLION ERASE/WRITE CYCLES with
40 YEARS DATA RETENTION
SINGLE SUPPLY VOLTAGE:
– 3V to for ST24x04 versions
– to for ST25x04 versions
HARDWARE WRITE CONTROL VERSIONS: 8 8
ST24W04 and ST25W04
PROGRAMMABLE WRITE PROTECTION 1 1
TWO WIRE SERIAL INTERFACE, FULLY I2C
PATIBLE PSDIP8 (B) SO8 (M)
Frame 150mil Width
BYTE and MULTIBYTE WRITE (up to 4
BYTES)
PAGE WRITE (up to 8 BYTES)
BYTE, RANDOM and SEQUENTIAL READ
MODES Figure 1. Logic Diagram
SELF TIMED PROGRAMMING CYCLE
AUTOMATIC ADDRESS INCREMENTING
ENHANCED ESD/LATCH UP
PERFORMANCES
VCC
DESCRIPTION
This specification covers a range of 4 Kbits I2C bus
EEPROM products, the ST24/25C04 and the 2
ST24/25W04. In the text, products are referred to E1-E2 SDA
as ST24/25x04, where "x" is: "C" for Standard
version and "W" for hardware Write Control ver- PRE ST24x04
sion. ST25x04
SCL
Table 1. Signal Names MODE/WC*
PRE Write Protect Enable
E1-E2 Chip Enable Inputs
SDA Serial Data Address Input/Output VSS
AI00851E
SCL Serial Clock
Multibyte/Page Write Mode
MODE
(C version)
WC Write Control (W version)
VCC Supply Voltage
VSS Ground Note: WC signal is only available for ST24/25W04 products.
February 1999 1/16
ST24/25C04, ST24/25W04
Figure 2A. DIP Pin Connections Figure 2B. SO Pin Connections
ST24x04 ST24x04
ST25x04 ST25x04
PRE1 8 VCC PRE1 8 VCC
E1 2 7 MODE/WC E1 2 7 MODE/WC
E2 3 6 SCL E2 3 6 SCL
VSS 4 5 SDA VSS 4 5 SDA
AI00852E AI01107E
Table 2. Absolute Maximum Ratings (1)
Symbol Parameter Value Unit
TA Ambient Operating Temperature –40 to 125 °C
TSTG Storage Temperature –65 to 150 °C
T Lead Temperature, Soldering (SO8 package) 40 sec 215
LEAD °C
(PSDIP8 package) 10 sec 260
VIO Input or Output Voltages – to V
VCC Supply Voltage – to V
Electrostatic Discharge Voltage (Human Body mo