HM-6561 Intersil Corporation, HM-6561 Datasheet - Page 2

• Manufacturer Part Number: HM-6561
• Description: 256 x 4 CMOS RAM
• Manufacturer: Intersil Corporation

Functional Diagram
NOTES:
1. All lines positive logic-active high.
2. Three-state Buffers: A high
3. Data Latches: L high
4. Address Latches and Gated Decoders: Latch on falling edge of E and gate on falling edge of E.
DQ0
DQ1
DQ2
DQ3
Q = D and Q latches on falling edge of L.
A0
A1
A5
A6
A7
S1
S2
W
E
output active.
A
A
A
A
ADDRESS
REGISTER
LATCHED
Q
Q
Q
Q
L
LATCH
LATCH
LATCH
LATCH
A
A
HM-6561/883
5
5
6-118
D
L
D
L
D
L
D
L
DECODER
GATED
ROW
G
A
A
A
A
32
G
L
A2
LATCHED ADDRESS
GATED COLUMN
AND DATA I / O
A
8
DECODER
REGISTER
3
MATRIX
32 x 32
A3
8
A
8
3
A4
8