SDA

VSS

SCL

WC

E1

E0

VCC

E2

AI01205B

ST24E64

ST25E64

1

2

3

4

8

7

6

5

Figure 2A. DIP Pin Connections

1

AI01206C

2

3

4

8

7

6

5

SDA

VSS

SCL

WC

E1

E0

VCC

E2

ST24E64

ST25E64

Figure 2B. SO Pin Connections

addressing standard, two wire serial interface

which uses a bi-directional data bus and serial

clock. The ST24/25E64carry a built-in 4 bit, unique

device identification code (1010) corresponding to

DESCRIPTION (cont’d)

operations synchronized by the serial clock. Read

and write operations are initiated by a START

conditiongenerated by the bus master. The START

condition is followed by a stream of 4 bits (identifi-

cation code 1010), 3 bit Chip Enable input to form

a 7 bit Device Select, plus one read/write bit and

terminated by an acknowledge bit.

Symbol

Parameter

Value

Unit

Ambient Operating Temperature

–40 to 125

°C

Storage Temperature

–65 to 150

°C

Lead Temperature, Soldering

(SO8)

(PSDIP8)

40 sec

10 sec

215

260

°C

Input or Output Voltages

–0.6 to 6.5

V

Supply Voltage

–0.3 to 6.5

V

Electrostatic Discharge Voltage (Human Body model)

(2)

4000

V

Electrostatic Discharge Voltage (Machine model)

(3)

500

V

Notes: 1. Except for the rating ”Operating Temperature Range”, stresses above those listed in the Table ”Absolute Maximum Ratings”

may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other

conditions above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum

Rating conditions for extended periods may affect device reliability. Refer also to the SGS-THOMSON SURE Program and

other relevant quality documents.

2. 100pF through 1500

Ω; MIL-STD-883C, 3015.7

3. 200pF through 0

Ω; EIAJ IC-121 (condition C)

2/16

ST24E64, ST25E64