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

V

Supply Voltage

–0.3 to 6.5

V

Electrostatic Discharge Voltage (Human Body model)

(2)

ST93C46A,T

ST93C46C

2000

4000

V

Electrostatic Discharge Voltage (Machine model)

(3)

ST93C46

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

Ω).

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

Ω).

1

VSS

Q

ORG

DU

C

SVCC

D

AI00874C

ST93C46

ST93C47

2

3

4

8

7

6

5

Figure 2B. SO Pin Connections

Warning: DU = Don’t Use

VSS

Q

ORG

DU

C

SVCC

D

AI00872C

ST93C46

ST93C47

1

2

3

4

8

7

6

5

Figure 2A. DIP Pin Connections

Warning: DU = Don’t Use

1

D

C

Q

VSS

VCC

DU

ORG

S

AI00982B

ST93C46T

ST93C47T

2

3

4

8

7

6

5

Figure 2C. SO, 90

° Turn, Pin Connections

Warning: DU = Don’t Use

The 1K bit memory is divided into either 128 x 8 bit

bytes or 64 x 16 bit words. The organization may

be selected by a signal on the ORG input. The

memory is accessed by a set of instructions which

includes Read a byte/word, Write a byte/word,

Erase a byte/word, Erase All and Write All.

A Read instruction loads the address of the first

byte/word to be read into an internal address

pointer. The data is then clocked out serially.

The address pointer is automatically incremented

after the data is output and, if the Chip Select input

(S) is held High, the ST93C46 can output a sequen-

tial stream of data bytes/words. In this way, the

memory can be read as a data stream from 8 to

1024 bits long, or continuously as the address

DESCRIPTION (cont’d)

2/13

ST93C46A/46C/46T, ST93C47C/47T