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CY7C1372D-167AXC Datasheet(PDF) 1 Page - Cypress Semiconductor

Part # CY7C1372D-167AXC
Description  18-Mbit (512K X 36/1M X 18) Pipelined SRAM with NoBL Architecture
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY7C1372D-167AXC Datasheet(HTML) 1 Page - Cypress Semiconductor

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PRELIMINARY
18-Mbit (512K x 36/1M x 18) Pipelined
SRAM with NoBL™ Architecture
CY7C1370D
CY7C1372D
Cypress Semiconductor Corporation
3901 North First Street
San Jose
, CA 95134
408-943-2600
Document #: 38-05555 Rev. *A
Revised October 12, 2004
Features
• Pin-compatible and functionally equivalent to ZBT™
• Supports 250-MHz bus operations with zero wait states
— Available speed grades are 250, 225, 200, and
167 MHz
• Internally self-timed output buffer control to eliminate
the need to use asynchronous OE
• Fully registered (inputs and outputs) for pipelined
operation
• Byte Write capability
• Single 3.3V power supply
• 3.3V/2.5V I/O power supply
• Fast clock-to-output times
— 2.6 ns (for 250-MHz device)
— 2.8 ns (for 225-MHz device)
— 3.0 ns (for 200-MHz device)
— 3.4 ns (for 167-MHz device)
• Clock Enable (CEN) pin to suspend operation
• Synchronous self-timed writes
• Available in lead-Free 100 TQFP, 119 BGA, and 165 fBGA
packages
• IEEE 1149.1 JTAG Boundary Scan
• Burst capability—linear or interleaved burst order
• “ZZ” Sleep Mode option and Stop Clock option
Functional Description
The CY7C1370D and CY7C1372D are 3.3V, 512K x 36 and
1 Mbit x 18 Synchronous pipelined burst SRAMs with No Bus
Latency™ (NoBL
™) logic, respectively. They are designed to
support unlimited true back-to-back Read/Write operations
with no wait states. The CY7C1370D and CY7C1372D are
equipped with the advanced (NoBL) logic required to enable
consecutive Read/Write operations with data being trans-
ferred on every clock cycle. This feature dramatically improves
the throughput of data in systems that require frequent
Write/Read transitions. The CY7C1370D and CY7C1372D are
pin compatible and functionally equivalent to ZBT devices.
All synchronous inputs pass through input registers controlled
by the rising edge of the clock. All data outputs pass through
output registers controlled by the rising edge of the clock. The
clock input is qualified by the Clock Enable (CEN) signal,
which when deasserted suspends operation and extends the
previous clock cycle.
Write operations are controlled by the Byte Write Selects
(BWa–BWd for CY7C1370D and BWa–BWb for CY7C1372D)
and a Write Enable (WE) input. All writes are conducted with
on-chip synchronous self-timed write circuitry.
Three synchronous Chip Enables (CE1, CE2, CE3) and an
asynchronous Output Enable (OE) provide for easy bank
selection and output three-state control. In order to avoid bus
contention, the output drivers are synchronously three-stated
during the data portion of a write sequence.
A0, A1, A
C
MODE
BWa
BWb
WE
CE1
CE2
CE3
OE
READ LOGIC
DQs
DQPa
DQPb
DQPc
DQPd
D
A
T
A
S
T
E
E
R
I
N
G
O
U
T
P
U
T
B
U
F
F
E
R
S
MEMORY
ARRAY
E
E
INPUT
REGISTER 0
ADDRESS
REGISTER 0
WRITE ADDRESS
REGISTER 1
WRITE ADDRESS
REGISTER 2
WRITE REGISTRY
AND DATA COHERENCY
CONTROL LOGIC
BURST
LOGIC
A0'
A1'
D1
D0
Q1
Q0
A0
A1
C
ADV/LD
ADV/LD
E
INPUT
REGISTER 1
S
E
N
S
E
A
M
P
S
E
CLK
CEN
WRITE
DRIVERS
BWc
BWd
ZZ
SLEEP
CONTROL
O
U
T
P
U
T
R
E
G
I
S
T
E
R
S
Logic Block Diagram-CY7C1370D (512K x 36)


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