CY7C1041AV33 Datasheet, PDF (1/9 Pages) Cypress Semiconductor – 256K x 16 Static RAM

33
PRELIMINARY
CY7C1041AV33/
GVT73256A16
Features
• Fast access times: 10, 12 ns
• Fast OE access times: 5, 6, and 7 ns
• Single +3.3V ±0.3V power supply
• Fully static—no clock or timing strobes necessary
• All inputs and outputs are TTL-compatible
• Three state outputs
• Center power and ground pins for greater noise
immunity
• Easy memory expansion with CE and OE options
• Automatic CE power-down
• High-performance, low power consumption, CMOS
double-poly, double-metal process
• Packaged in 44-pin, 400-mil SOJ and 44-pin, 400-mil
TSOP
Functional Block Diagram
256K x 16 Static RAM
Functional Description
The CY7C1049AV33\GVT73512A8 is organized as a 262,144
x 16 SRAM using a four-transistor memory cell with a high-per-
formance, silicon gate, low-power CMOS process. Cypress
SRAMs are fabricated using double-layer polysilicon, dou-
ble-layer metal technology.
This device offers center power and ground pins for improved
performance and noise immunity. Static design eliminates the
need for external clocks or timing strobes. For increased sys-
tem flexibility and eliminating bus contention problems, this de-
vice offers Chip Enable (CE), separate Byte Enable controls
(BLE and BHE) and Output Enable (OE) with this organization.
The device offers a low-power standby mode when chip is not
selected. This allows system designers to meet low standby
power requirements.
Pin Configuration
VCC
VSS
A0
A16
MEMORY ARRAY
512 ROWS X 256 X 16
COLUMNS
COLUMN DECODER
POWER
DOWN
BLE#
DQ1
DQ8
DQ9
DQ16
CE#
BHE#
WE#
OE#
SOJ/TSOP II
Top View
A₀ 1
A₁ 2
A₂ 3
A₃ 4
A₄ 5
CE 6
DQ₁ 7
DQ₂ 8
DQ₃ 9
DQ₄ 10
V_CC 11
V_SS 12
DQ₅ 13
DQ_{6 14}
DDQQ₇₈
15
16
WE 17
A₅ ¹⁸
A₆ 19
A₇ 20
A₈ 21
A₉ 22
44 _A17
43 A₁₆
42 _A15
41 _OE
40 _BHE
39 _BLE
38 _DQ16
37 _DQ15
36 _DQ14
35
34
VD_S^Q_S13
33 _VCC
32 DQ₁₂
31 DQ₁₁
30 DQ₁₀
29 DQ₉
28 _NC
27 _A14
26 A₁₃
25 A₁₂
24 ^A11
23 A₁₀
Selection Guide
Maximum Access Time (ns)
Maximum Operating Current (mA)
Maximum CMOS Standby Current (mA)
CY7C1049AV33-10/ CY7C1049AV33-12/
GVT73512A8-10
GVT73512A8-12
10
12
240
210
Com’l/Ind’l
10
10
Com’l
L
3.0
3.0
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
June 15, 2000