CY7C164_06 Datasheet, PDF (1/9 Pages) Cypress Semiconductor – 16K x 4 Static RAM

CY7C164
CY7C166
16K x 4 Static RAM
Features
• High speed
— 15 ns
• Output enable (OE) feature (CY7C166)
• CMOS for optimum speed/power
• Low active power
— 633 mW
• Low standby power
— 110 mW
• TTL-compatible inputs and outputs
• Automatic power-down when deselected
• CY7C164 is available in non Pb-free 22-pin (300-Mil)
Molded DIP, CY7C166 in non Pb-free 24-pin Molded SOJ
Functional Description
The CY7C164 and CY7C166 are high-performance CMOS
static RAMs organized as 16,384 by 4 bits. Easy memory
expansion is provided by an active LOW Chip Enable (CE) and
tri-state drivers. The CY7C166 has an active LOW Output
Enable (OE) feature. Both devices have an automatic power-
down feature, reducing the power consumption by 65% when
deselected.
Writing to the device is accomplished when the Chip Enable
(CE) and Write Enable (WE) inputs are both LOW (and the
Output Enable (OE) is LOW for the CY7C166). Data on the
four input/output pins (I/O₀ through I/O₃) is written into the
memory location specified on the address pins (A₀ through
A₁₃).
Reading the device is accomplished by taking Chip Enable
(CE) LOW (and OE LOW for CY7C166), while Write Enable
(WE) remains HIGH. Under these conditions the contents of
the memory location specified on the address pins will appear
on the four data I/O pins.
The I/O pins stay in a high-impedance state when Chip Enable
(CE) is HIGH (or Output Enable (OE) is HIGH for CY7C166).
A die coat is used to insure alpha immunity.
Logic Block Diagram
Pin Configurations
INPUT BUFFER
A₁
A₂
AA₃₄
16K x 4
AA₅₆
ARRAY
AA₇₈
DIP
Top View
SOJ
Top View
I/O₃
I/O₂
I/O₁
I/O₀
A_{5 1}
22 ^VCC
A₆ 2
21 A4
A₇ 3
20 A3
A₈ 4
19 A₂
A₉ 5
18 A1
A_{10 6} 7C164 17 _A0
A_{11 7}
16 _I/O3
A_{12 8}
15 I/O₂
A₁₃ 9
14 I/O₁
CE 10
13 I/O0
GND 11
12 WE
A_{5 1}
24 ^VCC
A₆ 2
23 ^A4
A₇ 3
22 A₃
A₈ 4
21 A2
A₉ 5
20 ^A1
A_{10 6} 7C166 _{19 A0}
A_{11 7}
18 NC
A_{12 8}
17 I/O₃
A₁₃ 9
16 ^I/O2
CE 10
15 ^I/O1
OE 11
14 I/O0
GND 12
13 _WE
COLUMN
DECODER
POWER
DOWN
CE
WE
(OE)
(7C166 ONLY)
Cypress Semiconductor Corporation • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600
Document #: 38-05025 Rev. *A
Revised August 3, 2006
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