SDA9251-2X datasheet(8/23 Pages) SIEMENS

Part #	SDA9251-2X

Description	868352-Bit Dynamic Sequential Access Memory for Television Applications (TV-SAM)

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Manufacturer	SIEMENS [Siemens Semiconductor Group]

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SDA 9251-2X

Semiconductor Group

166

Pin Definitions and Functions

Pin No.

Symbol

Input (I)

Output (O)

Function

3

2

27

26

SQA0

SQA1

SQA2

SQA3

O

Serial data output for port A

20

SCA

I

Serial clock input for port A

19

RA

I

Read transfer control input (latch A to shift register A)

25

OEA

I

Output enable input for port A

5

4

24

23

SQB0

SQB1

SQB2

SQB3

O

Serial data output for port B

18

SCB

I

Serial clock input for port B and C

17

RB

I

Read transfer control input (latch B to shift register B)

22

OEB

I

Output enable input for port B

6

7

8

9

SDC0

SDC1

SDC2

SDC3

I

Serial data input for port C

16

WT

I

Write transfer control input (shift register C to latch C)

12

SAR

I

Serial row address input

13

SAC

I

Serial column address and mode control input

11

SCAD

I

Serial address clock input

10

RE

I

RAM-enable input (also latches the addresses)

1

V

CC1

Data output power supply (+ 5 V)

28

V

SS1

Data output power supply (GND)

14

V

CC2

Memory power supply (+ 5 V)

15

V

SS2

Memory power supply (GND)

21

(TF)

Test function (for factory use only)

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SDA9251-2X Datasheet(PDF) 8 Page - Siemens Semiconductor Group

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