P4C1681, P4C1682
P4C1681, P4C1682
ULTRA HIGH SPEED 4K x 4
STATIC CMOS RAMS
FEATURES
Separate Inputs and Outputs
Full CMOS, 6T Cell
– P4C1681 Input Data at Outputs during Write
– P4C1682 Outputs in High Z during Write
High Speed (Equal Access and Cycle Times)
– 12/15/20/25 ns (Commercial)
– 20/25/35ns (P4C1682 Military)
Fully TTL Compatible Inputs and Outputs
Standard Pinout (JEDEC Approved)
– 24-Pin 300 mil DIP
– 24-Pin 300 mil SOIC
– 24-Pin 300 mil SOJ
– 24-Pin CERDIP
Low Power Operation (Commercial)
– 715 mW Active – 12, 15
– 550 mW Active – 20/25/35
– 193 mW Standby (TTL Input)
– 83 mW Standby (CMOS Input)
– 28-Pin LCC (450 mil x 450 mil)
Single 5V ± 10%Power Supply
DESCRIPTION
CMOS is used to reduce power consumption to a low 715
mW active, 193 mW standby. For the P4C1682 and
P4C1681, power is only 83 mW standby with CMOS input
.
The P4C1681 and P4C1682 are 16,384-bit (4K x 4) ultra
high speed static RAMs similar to the P4C168, but with
separate data I/O pins. The P4C1681 features a
transparent write operation; the outputs of the P4C1682
are in high impedance during the write cycle. All devices
have low power standby modes. The RAMs operate from
a single 5V ± 10% tolerance power supply.
levels.
The P4C1681 and P4C1682 are available in 24-pin 300
mil DIP and SOIC packages providing excellent board
level densities. The P4C1682 is also available in a 28-pin
LCC package.
Access times as fast as 12 nanoseconds are available,
permitting greatly enhanced system operating speeds.
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATIONS
A
V
A
A
A
A
I
A
A
A
A
1
24
23
22
21
20
19
18
17
16
15
14
13
16,384-BIT
ROW
CC
11
10
9
0
1
2
3
MEMORY
(7)
SELECT
2
ARRAY
3
A
4
26
25
4
3
2
28 27
A
A
A
A
5
6
9
8
4
5
I1
I2
I3
I4
O1
O2
O3
O4
1
A
A
5
24
23
4
5
8
INPUT
DATA
CONTROL
I
7
6
4
NC
NC
COLUMN I/O
4
NC
NC
8
22
21
A
A
7
I
3
6
7
9
A
6
A
7
8
O
4
3
2
1
I
20
19
10
11
3
9
O
O
O
I
1
I
O
4
POWER
DOWN
COLUMN
SELECT
1
10
11
12
I
13 14 15 16 17
2
CE
12
18
CE
WE
GND
WE
A
A
(5)
P4C1682
P4C1681
LCC (L5-1)
TOP VIEW
DIP (P4,D4), SOIC (S4), SOJ (J4)
TOP VIEW
Means Quality, Service and Speed
1Q97
41