CY7C1461AV33_12 Datasheet, PDF (1/24 Pages) Cypress Semiconductor – 36-Mbit (1 M × 36/2 M × 18) Flow-Through SRAM with NoBL™ Architecture

CY7C1461AV33
CY7C1463AV33
36-Mbit (1 M × 36/2 M × 18) Flow-Through
SRAM with NoBL™ Architecture
36-Mbit (1 M × 36/2 M × 18) Flow-Through SRAM with NoBL™ Architecture
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
■ 3.3 V and 2.5 V I/O 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.
■ Three chip enables for simple depth expansion
■ Automatic power down feature available using ZZ mode or CE
deselect
■ Burst capability – linear or interleaved burst order
■ Low standby power
Functional Description
The CY7C1461AV33/CY7C1463AV33 are 3.3 V,
1 M × 36/2 M × 18 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 is equipped with the advanced
NoBL logic required to enable consecutive read and write
operations with data being transferred 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 (BW_X) 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
Maximum Access Time
Maximum Operating Current
Maximum CMOS Standby Current
Description
133 MHz Unit
6.5
ns
310
mA
120
mA
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 38-05356 Rev. *L
• San Jose, CA 95134-1709 • 408-943-2600
Revised July 24, 2012