CY7C1020D Datasheet, PDF (1/11 Pages) Cypress Semiconductor – 512K (32K x 16) Static RAM

CY7C1020D
512K (32K x 16) Static RAM
Features
• Pin- and function-compatible with CY7C1020B
• High speed
— t_AA = 10 ns
• Low active power
— I_CC = 80 mA @ 10ns
• Low CMOS Standby Power
— I_SB2 = 3 mA
• 2.0V Data Retention
• Automatic power-down when deselected
• CMOS for optimum speed/power
• Independent control of upper and lower bits
• Available in Pb-free 44-pin 400-Mil wide Molded SOJ and
44-pin TSOP II packages
Logic Block Diagram
Functional Description ^[1]
The CY7C1020D is a high-performance CMOS static RAM
organized as 32,768 words by 16 bits. This device has an
automatic power-down feature that significantly reduces
power consumption when deselected.The input and output
pins (IO₀ through IO₁₅) are placed in a high-impedance state
when:
• Deselected (CE HIGH)
• Outputs are disabled (OE HIGH)
• BHE and BLE are disabled (BHE, BLE HIGH)
• When the write operation is active (CE LOW, and WE LOW)
Write to the device by taking Chip Enable (CE) and Write
Enable (WE) inputs LOW. If Byte Low Enable (BLE) is LOW,
then data from IO pins (IO₀ through IO₇), is written into the
location specified on the address pins (A₀ through A₁₄). If Byte
High Enable (BHE) is LOW, then data from IO pins (IO₈
through IO₁₅) is written into the location specified on the
address pins (A₀ through A₁₄).
Reading from the device by taking Chip Enable (CE) and
Output Enable (OE) LOW while forcing the Write Enable (WE)
HIGH. If Byte Low Enable (BLE) is LOW, then data from the
memory location specified by the address pins appears on IO₀
to IO₇. If Byte High Enable (BHE) is LOW, then data from
memory appears on IO₈ to IO₁₅. See the “Truth Table” on
page 8 for a complete description of read and write modes.
DATA IN DRIVERS
A₇
A₆
A₅
A₄
32K x 16
A₃
RAM Array
A₂
A₁
A₀
IO₀–IO₇
IO₈–IO₁₅
COLUMN DECODER
BHE
WE
CE
OE
BLE
Note
1. For guidelines on SRAM system design, please refer to the ‘System Design Guidelines’ Cypress application note, available on the internet at www.cypress.com.
Cypress Semiconductor Corporation
Document #: 38-05463 Rev. *E
• 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600
Revised February 22, 2007
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