Symbol

Parameter

Value

Unit

Ambient Operating Temperature

–40 to 125

°C

Storage Temperature

–65 to 150

°C

Lead Temperature, Soldering

(SO8 package)

(PSDIP8 package)

40 sec

10 sec

215

260

°C

Output Voltage

V

Input Voltage with respect to Ground

–0.3 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 i mplied. Exposure to Absolute Maximum

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

other relevant quality documents.

2. MIL-STD-883C, 3015.7 (100pF, 1500

Ω)

3. EIAJ IC-121 (Condition C) (200pF, 0

Ω)

The device connected to the bus is selected when

the chip select input (S) goes low. Communications

with the chip can be interrupted with a hold input

(HOLD). The write operation is disabled by a write

protect input (W).

Data is clocked in during the low to high transition

of clock C, data is clocked out during the high to

low transition of clock C.

SIGNALS DESCRIPTION

Serial Output (Q). The output pin is used to trans-

fer data serially out of the Memory. Data is shifted

out on the falling edge of the serial clock.

Serial Input (D). The input pin is used to transfer

data serially into the device. It receivesinstructions,

addresses, and the data to be written. Input is

latched on the rising edge of the serial clock.

D

VSS

C

HOLD

Q

SVCC

W

AI01436B

ST950x0

1

2

3

4

8

7

6

5

Figure 2A. DIP Pin Connections

1

AI01437B

2

3

4

8

7

6

5D

VSS

C

HOLD

Q

SVCC

W

ST950x0

Figure 2B. SO Pin Connections

DESCRIPTION (cont’d)

2/18

ST95040, ST95020, ST95010