CY7C1461AV33
CY7C1463AV33, CY7C1465AV33
36 Mbit (1M x 36/2 M x 18/512K x 72)
Flow-Through SRAM with NoBL™ Architecture
Cypress Semiconductor Corporation
•
198 Champion Court
•
San Jose
, CA 95134-1709
•
408-943-2600
Document #: 38-05356 Rev. *G
Revised May 05, 2008
Features
■ No Bus Latency™ (NoBL™) architecture eliminates dead
cycles between write and read cycles
■ Supports up to 133 MHz bus operations with zero wait states
❐ Data is transferred on every clock
■ Pin compatible and functionally equivalent to ZBT™ devices
■ Internally self timed output buffer control to eliminate the need
to use OE
■ Registered inputs for flow through operation
■ Byte write capability
■ 3.3V and 2.5V IO power supply
■ Fast clock-to-output times
❐ 6.5 ns (for 133 MHz device)
■ Clock Enable (CEN) pin to enable clock and suspend operation
■ Synchronous self timed writes
■ Asynchronous Output Enable
■ CY7C1461AV33, CY7C1463AV33 available in
JEDEC-standard Pb-free 100-pin TQFP package, Pb-free and
non Pb-free 165-Ball FBGA package. CY7C1465AV33
available in Pb-free and non-Pb-free 209-Ball FBGA package
■ Three chip enables for simple depth expansion
■ Automatic power down feature available using ZZ mode or CE
deselect
■ IEEE 1149.1 JTAG-compatible boundary scan
■ Burst capability — linear or interleaved burst order
■ Low standby power
Functional Description
The CY7C1461AV33/CY7C1463AV33/CY7C1465AV33[1] are
3.3V, 1M x 36/2M x 18/512K x 72 Synchronous Flow-Through
Burst SRAMs designed specifically to support unlimited true
back-to-back read and write operations without the insertion of
wait states. The CY7C1461AV33/CY7C1463AV33/CY7C1465AV33 is
equipped with the advanced NoBL logic required to enable
consecutive read and write operations with data being trans-
ferred on every clock cycle. This feature dramatically improves
the throughput of data through the SRAM, especially in systems
that require frequent write-read transitions.
All synchronous inputs pass through input 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. Maximum
access delay from the clock rise is 6.5 ns (133 MHz device).
Write operations are controlled by the two or four Byte Write
Select (BWX) 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 tri-state control. To avoid bus contention,
the output drivers are synchronously tri-stated during the data
portion of a write sequence.
Selection Guide
133 MHz
100 MHz
Unit
Maximum Access Time
6.5
8.5
ns
Maximum Operating Current
310
290
mA
Maximum CMOS Standby Current
120
120
mA
Note
1. For best practices recommendations, refer to the Cypress application note System Design Guidelines on www.cypress.com.
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