SDA9251-2X Datasheet, PDF (8/23 Pages) Siemens Semiconductor Group – 868352-Bit Dynamic Sequential Access Memory for Television Applications (TV-SAM)

SDA 9251-2X
Pin Definitions and Functions
Pin No. Symbol
3
SQA0
2
SQA1
27
SQA2
26
SQA3
20
SCA
19
RA
25
OEA
5
SQB0
4
SQB1
24
SQB2
23
SQB3
18
SCB
17
RB
22
OEB
6
SDC0
7
SDC1
8
SDC2
9
SDC3
16
WT
12
SAR
13
SAC
11
SCAD
10
RE
1
V_CC1
28
V_SS1
14
V_CC2
15
V_SS2
21
(TF)
Input (I)
Output (O)
O
O
O
O
I
I
I
O
O
O
O
I
I
I
I
I
I
I
I
I
I
I
I
Function
Serial data output for port A
Serial clock input for port A
Read transfer control input (latch A to shift register A)
Output enable input for port A
Serial data output for port B
Serial clock input for port B and C
Read transfer control input (latch B to shift register B)
Output enable input for port B
Serial data input for port C
Write transfer control input (shift register C to latch C)
Serial row address input
Serial column address and mode control input
Serial address clock input
RAM-enable input (also latches the addresses)
Data output power supply (+ 5 V)
Data output power supply (GND)
Memory power supply (+ 5 V)
Memory power supply (GND)
Test function (for factory use only)
Semiconductor Group
166