CY7C266 Datasheet, PDF (1/11 Pages) Cypress Semiconductor – 8Kx8 Power-Switched and Reprogrammable PROM

1CY7C266
CY7C266
Features
• CMOS for optimum speed/power
• Windowed for reprogrammability
• High speed
— 20 ns (Commercial)
• Low power
— 660 mW (Commercial)
• Super low standby power
— Less than 85 mW when deselected
• EPROM technology 100% programmable
• 5V ±10% V_CC, commercial and military
• TTL-compatible I/O
• Direct replacement for 27C64 EPROMs
Functional Description
The CY7C266 is a high-performance 8192-word by 8-bit
CMOS PROM. When deselected, the CY7C266 automatically
Logic Block Diagram
A₀
A₁
A₂
A₃
ROW
ADDRESS
PROGRAMMABLE
ARRAY
MULTIPLEXER
A₄
A₅
A₆
A₇
ADDRESS
DECODER
A₈
A₉
A₁₀
COLUMN
ADDRESS
A₁₁
A₁₂
POWER DOWN
CE
OE
8Kx8 Power-Switched and
Reprogrammable PROM
powers down into a low-power standby mode. It is packaged
in a 600-mil-wide package. The reprogrammable packages
are equipped with an erasure window; when exposed to UV
light, these PROMs are erased and can then be repro-
grammed. The memory cells utilize proven EPROM
floating-gate technology and byte-wide intelligent
programming algorithms.
The CY7C266 is a plug-in replacement for EPROM devices.
The EPROM cell requires only 12.5V for the super voltage and
low-current requirements allow for gang programming. The
EPROM cells allow for each memory location to be tested
100%, as each location is written into, erased, and repeatedly
exercised prior to encapsulation. 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
OE and CE. The contents of the memory location addressed
by the address lines (A₀ through A₁₂) will become available on
the output lines (O₀ through O₇).
Pin Configurations
O₇
CerDIP
Top View
V_CC 1
28 V_CC
A₁₂ 2
27 V_CC
O₆
A₇ 3
26 _NC
A₆ 4
25 A₈
A₅ 5
24 A₉
A₄ 6
23 A₁₁
O₅
A₃ 7
22 OE
A₂ 8
21 A₁₀
A₁ 9 _{7C266 20 CE}
A₀ 10
19 O₇
O₄
O₀ 11
18 O6
O₁ 12
17 O5
O₂ 13
16 O4
GND 14
15 O3
O₃
LCC
Top View
O₂
4 3 2 1 32 31 30
O₁
O₀
A₆
A₅
A₄
A₃
A₂
A₁
A₀
5
6
7
8
9
10
11
NC ₁₂
7C266
29 ^A8
28 ^A9
27 A11
26 NC
25 OE
24 ^A10
23 CE
22 O7
O₀ 13
21 O₆
14151617 181920
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
Document #: 38-04005 Rev. *B
Revised December 27, 2002