CY7C1051DV33 Datasheet, PDF (1/11 Pages) Cypress Semiconductor – 8-Mbit (512K x 16) Static RAM

PRELIMINARY
CY7C1051DV33
8-Mbit (512K x 16) Static RAM
Features
• High speed
— t_AA = 10 ns
• Low active power
— I_CC = 110 mA @ 10 ns
• Low CMOS standby power
— I_SB2 = 20 mA
• 2.0V data retention
• Automatic power-down when deselected
• TTL-compatible inputs and outputs
• Easy memory expansion with CE and OE features
• Available in lead-free 48-ball FBGA and 44-pin TSOP II
packages
Logic Block Diagram
A₀
A₁
A₂
A₃
A₄
A₅
A₆
A₇
A₈
INPUT BUFFER
512K × 16
ARRAY
COLUMN
DECODER
Functional Description^[1]
The CY7C1051DV33 is a high-performance CMOS Static
RAM organized as 512K words by 16 bits.
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–IO₇), is written into the location
specified on the address pins (A₀–A₁₈). If Byte HIGH Enable
(BHE) is LOW, then data from IO pins (IO₈–IO₁₅) is written into
the location specified on the address pins (A₀–A₁₈).
Read 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 will appear on IO₀–IO₇.
If Byte HIGH Enable (BHE) is LOW, then data from memory
will appear on IO₈ to IO₁₅. See the “Truth Table” on page 8 for
a complete description of Read and Write modes.
The input/output pins (IO₀–IO₁₅) are placed in a
high-impedance state when the device is deselected (CE
HIGH), the outputs are disabled (OE HIGH), the BHE and BLE
are disabled (BHE, BLE HIGH), or a Write operation (CE LOW,
and WE LOW) is in progress.
The CY7C1051DV33 is available in a 44-pin TSOP II package
with center power and ground (revolutionary) pinout, as well
as a 48-ball fine-pitch ball grid array (FBGA) package.
IO₀–IO₇
IO₈–IO₁₅
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 #: 001-00063 Rev. *C
• 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600
Revised March 9, 2007
[+] Feedback