P4C1256 Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – HIGH SPEED 32K x 8 STATIC CMOS RAM

P4C1256
HIGH SPEED 32K x 8
STATIC CMOS RAM
P4C1256
FEATURES
High Speed (Equal Access and Cycle Times)
— 12/15/20/25/35 ns (Commercial)
— 15/20/25/35/45 ns (Industrial)
— 20/25/35/45/55/70 ns (Military)
Low Power
— 880 mW Active (Commercial)
Single 5V±10% Power Supply
Easy Memory Expansion Using CE and OE
Inputs
Common Data I/O
Three-State Outputs
Fully TTL Compatible Inputs and Outputs
Advanced CMOS Technology
Fast t_OE
Automatic Power Down
Packages
—28-Pin 300 mil DIP and SOJ
—28-Pin 600 mil Ceramic DIP
—28-Pin LCC(350 mil x 550 mil)
—32-Pin LCC (450 mil x 550 mil)
DESCRIPTION
The P4C1256 is a 262,144-bit high-speed CMOS
static RAM organized as 32Kx8. The CMOS memory
requires no clocks or refreshing, and has equal access
and cycle times. Inputs are fully TTL-compatible. The
RAM operates from a single 5V±10% tolerance power
supply.
Access times as fast as 12 nanoseconds permit greatly
enhanced system operating speeds. CMOS is utilized
to reduce power consumption to a low level. The
P4C1256 is a member of a family of PACE RAM™ prod-
ucts offering fast access times.
The P4C1256 device provides asynchronous operation with
matching access and cycle times. Memory locations are
specified on address pins A₀ to A₁₄. Reading is accom-
plished by device selection (CE and output enabling (OE)
while write enable (WE) remains HIGH. By presenting the
address under these conditions, the data in the addressed
memory location is presented on the data input/output pins.
The input/output pins stay in the HIGH Z state when either
CE or OE is HIGH or WE is LOW.
Package options for the P4C1256 include 28-pin 300 mil
DIP and SOJ packages. For military temperature range,
Ceramic DIP and LCC packages are available.
FUNCTIONAL BLOCK DIAGRAM
A
(8)
A
I/O₁
I/O₂
WE
CE
OE
262,144-BIT
MEMORY
ARRAY
INPUT
DATA
CONTROL
COLUMN I/O
COLUMN
SELECT
••• •••
A
(7)
A
PIN CONFIGURATIONS
A0 1
A1 2
A2 3
A3 4
A4 ₅
A5 ₆
A6 ₇
A7 8
A8 9
A9 10
I/01 11
I/02 ¹²
I/03 ¹³
GND 14
28 VCC
27 _WE
26 A14
25 A13
24 A12
23 A11
22 OE
21 A10
20 CE
19 I/08
18 I/07
17 I/06
16 I/05
15 I/04
4 3 2 32 31 30
A3
5
1
29 A13
A4
6
28 A12
A5
7
27 A11
A6
8
26 NC
A7
9
25 OE
A8
10
24 A10
A9
11
23 CE
NC
12
22 I/O8
I/O1
13
21 I/O7
14 15 16 17 18 19 20
DIP (P5, C5, D5-1), SOJ (J5) 1519B
TOP VIEW
32 LCC (L6)
TOP VIEW
See Selection Guide page for 28-pin LCC
Means Quality, Service and Speed
117
1Q97