4-Mbit (128K x 32) Pipelined Sync SRAM

CY7C1339G

CypressSemiconductor Corporation • 198 Champion Court • San Jose,CA 95134-1709 • 408-943-2600
Document #: 38-05520 Rev. *F Revised July 5, 2006

Features

• Registered inputs and outputs for pipelined operation
• 128K × 32 common I/O architecture
• 3.3V core power supply (VDD)
• 2.5V/3.3V I/O power supply (VDDQ)
• Fast clock-to-output times
— 2.6 ns (for 250-MHz device)
• Provide high-performance 3-1-1-1 access rate
• User-selectable burst counter supporting Intel®
Pentium® interleaved or linear burst sequences
• Separate processor and controller address strobes
• Synchronous self-timed writes
• Asynchronous output enable
• Available in lead-free 100-Pin TQFP package, lead-free
and non-lead-free 119-Ball BGA package
• “ZZ” Sleep Mode Option
Functional Description[1]
The CY7C1339G SRAM integrates 128K x 32 SRAM cells with
advanced synchronous peripheral circuitry and a two-bit
counter for internal burst operation. All synchronous inputs are
gated by registers controlled by a positive-edge-triggered
Clock Input (CLK). The synchronous inputs include all
addresses, all data inputs, address-pipelining Chip Enable
(CE1), depth-expansion Chip Enables (CE2 and CE3), Burst
Control inputs (ADSC, ADSP, and ADV), Write Enables
(BW[A:D], and BWE), and Global Write (GW). Asynchronous
inputs include the Output Enable (OE) and the ZZ pin.
Addresses and chip enables are registered at rising edge of
clock when either Address Strobe Processor (ADSP) or
Address Strobe Controller (ADSC) are active. Subsequent
burst addresses can be internally generated as controlled by
the Advance pin (ADV).
Address, data inputs, and write controls are registered on-chip
to initiate a self-timed Write cycle.This part supports Byte Write
operations (see Pin Descriptions and Truth Table for further
details). Write cycles can be one to four bytes wide as
controlled by the byte write control inputs. GW when active
LOW causes all bytes to be written.
The CY7C1339G operates from a +3.3V core power supply
while all outputs may operate with either a +2.5 or +3.3V
supply. All inputs and outputs are JEDEC-standard
JESD8-5-compatible.
1
Note:
1. For best-practices recommendations, please refer to the Cypress application note System Design Guidelines on www.cypress.com.
ADDRESS
REGISTER
ADV
CLK BURST
COUNTER
AND
LOGIC
CLR
Q1
Q0
ADSP
ADSC
MODE
BWE
GW
CE
1
CE
2
CE
3
OE
ENABLE
REGISTER
OUTPUT
REGISTERS
SENSE
AMPS
OUTPUT
BUFFERS
E
PIPELINED
ENABLE
INPUT
REGISTERS
A0,A1,A
BW
B
BW
C
BW
D
BW
A
MEMORY
ARRAY
DQs
SLEEP
CONTROL
ZZ
A
[1:0]
2
DQA
BYTE
WRITEREGISTER
DQB
BYTE
WRITEREGISTER
DQC
BYTE
WRITEREGISTER
DQD
BYTE
WRITEREGISTER
DQA
BYTE
WRITEDRIVER
DQB
BYTE
WRITEDRIVER
DQC
BYTE
WRITEDRIVER
DQD
BYTE
WRITEDRIVER

Logic Block Diagram

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