CY7C281A_06 Datasheet, PDF (1/8 Pages) Cypress Semiconductor – 1K x 8 PROM

CY7C281A
1K x 8 PROM
Features
• CMOS for optimum speed/power
• High speed
— 25 ns (Commercial)
• Low power
— 495 mW (Commercial)
• EPROM technology 100% programmable
• Slim 300-mil or standard 600-mil DIP or 28-pin LCC
• 5V ±10% V_CC, commercial and military
• TTL-compatible I/O
• Direct replacement for bipolar PROMs
• Capable of withstanding >2001V static discharge
Functional Description
The CY7C281A is a high-performance 1024-word by 8-bit
CMOS PROMs. It is packaged in 300-mil and 600-mil-wide
LogicBlockDiagram
A9
A8
A7
ROW
PROGRAMMABLE
A6
DECODER
ARRAY
A5
A4
A3
A2
COLUMN
A1
DECODER
A0
MULTIPLEXER
packages respectively. The CY7C281A is also available in a
28-pin leadless chip carrier. The memory cells utilize proven
EPROM floating-gate technology and byte-wide intelligent
programming algorithms.
The CY7C281A is a plug-in replacements for bipolar devices
and offer the advantages of lower power, superior perfor-
mance, and programming yield. The EPROM cell requires
only 12.5V for the super voltage, and low current requirements
allow for gang programming. The EPROM cells allow each
memory location to be tested 100% because each location is
written into, erased, and repeatedly exercised prior to encap-
sulation. Each PROM is also tested for AC performance to
guarantee that after customer programming, the product will
meet DC and AC specification limits.
Reading is accomplished by placing an active LOW signal on
CS₁ and CS₂, and active HIGH signals on CS₃ and CS₄. The
contents of the memory location addressed by the address
lines (A₀−A₉) will become available on the output lines
(O₀−O₇).
Pin Configurations
O7
DIP
Top View
A7 1
24 VCC
O6
A6 ₂
23 A8
A5 3
22 A9
A4 4
21 CS1
O5
A3 ₅
20 CS2
A2 ₆ 7C281A 19 CS3
A1 ₇
18 CS4
O4
A0 ₈
O0 ₉
17 O7
16 O6
O1 ₁₀
15 O5
O2 ₁₁
14 O4
O3
GND 12
13 O3
LCC/PLCC
O2
Top View
O1
4 3 2 1 28 27 26
A4 5
25 CS1
A3 6
24 CS2
A2 ₇
23 ^CS3
A1 ₈
7C281A ₂₂ CS4
O0
A0 ₉
21 NC
CS1
NC ₁₀
O0 ₁₁
20 O7
19 O6
CS2
121314151617 18
CS3
CS4
Cypress Semiconductor Corporation
Document #: 38-04003 Rev. *C
• 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600
Revised August 16, 2006
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