CY7C109D_11 Datasheet, PDF (1/14 Pages) Cypress Semiconductor – 1-Mbit (128 K × 8) Static RAM Low active power

CY7C109D
CY7C1009D
1-Mbit (128 K × 8) Static RAM
Features
■ Pin- and function-compatible with CY7C109B/CY7C1009B
■ High speed
❐ t_AA = 10 ns
■ Low active power
❐ I_CC = 80 mA at 10 ns
■ Low CMOS standby power
❐ I_SB2 = 3 mA
■ 2.0 V Data Retention
■ Automatic power-down when deselected
■ TTL-compatible inputs and outputs
■ Easy memory expansion with CE₁, CE₂ and OE options
■ CY7C109D available in Pb-free 32-pin 400-Mil wide Molded
SOJ and 32-pin TSOP I packages. CY7C1009D available in
Pb-free 32-pin 300-Mil wide Molded SOJ package
Logic Block Diagram
Functional Description ^[1]
The CY7C109D/CY7C1009D is a high-performance CMOS
static RAM organized as 131,072 words by 8 bits. Easy
memory expansion is provided by an active LOW Chip Enable
(CE₁), an active HIGH Chip Enable (CE₂), an active LOW
Output Enable (OE), and tri-state drivers.The eight input and
output pins (I/O₀ through I/O₇) are placed in a high-impedance
state when:
■ Deselected (CE₁ HIGH or CE₂ LOW),
■ Outputs are disabled (OE HIGH),
■ When the write operation is active (CE₁ LOW, CE₂ HIGH,
and WE LOW)
Write to the device by taking Chip Enable One (CE₁) and Write
Enable (WE) inputs LOW and Chip Enable Two (CE₂) input
HIGH. Data on the eight I/O pins (I/O₀ through I/O₇) is then
written into the location specified on the address pins (A₀
through A₁₆).
Read from the device by taking Chip Enable One (CE₁) and
Output Enable (OE) LOW while forcing Write Enable (WE) and
Chip Enable Two (CE₂) HIGH. Under these conditions, the
contents of the memory location specified by the address pins
appears on the I/O pins.
INPUT BUFFER
IO0
IO1
A0
A1
IO2
A2
A3
128K x 8
IO3
A4
A5
ARRAY
IO4
A6
A7
IO5
A8
IO6
CE1
COLUMN DECODER
POWER
DOWN
IO7
CE2
WE
OE
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 • 198 Champion Court
Document #: 38-05468 Rev. *G
• San Jose, CA 95134-1709 • 408-943-2600
Revised April 15, 2011
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