CY7C1440AV25
CY7C1446AV25
36-Mbit (1 M × 36/512 K × 72)
Pipelined Sync SRAM
36-Mbit (1
M × 36/512 K × 72) Pipelined Sync SRAM
Features
Functional Description
■ Supports bus operation up to 250 MHz
■ Available speed grades are 250 and 167 MHz
■ Registered inputs and outputs for pipelined operation
■ 2.5 V core power supply
The
CY7C1440AV25/CY7C1446AV25 SRAM
integrates
1 M × 36/512 K × 72 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 (BWX, and BWE), and Global Write (GW).
Asynchronous inputs include the Output Enable (OE) and the ZZ
pin.
■ 2.5 V power supply
■ Fast clock-to-output times
❐ 2.6 ns (for 250-MHz device)
■ Provide high-performance 3-1-1-1 access rate
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).
■ User-selectable burst counter supporting Intel Pentium
interleaved or linear burst sequences
■ Separate processor and controller address strobes
■ Synchronous self-timed writes
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 two or four bytes wide as
■ Asynchronous output enable
■ Single-cycle Chip Deselect
controlled by the byte write control inputs. GW when active
causes all bytes to be written.
LOW
■ CY7C1440AV25 available in Pb-free and non-Pb-free 165-ball
FBGA package. CY7C1446AV25 available in non-Pb-free
209-ball FBGA package
The CY7C1440AV25/CY7C1446AV25 operates from a +2.5 V
core power supply while all outputs may operate with a +2.5 V
supply. All inputs and outputs are JEDEC-standard
JESD8-5-compatible.
■ IEEE 1149.1 JTAG-Compatible Boundary Scan
■ “ZZ” Sleep Mode Option
For a complete list of related documentation, click here.
Selection Guide
Description
Maximum Access Time
250 MHz
2.6
167 MHz Unit
3.4
335
120
ns
Maximum Operating Current
435
mA
mA
Maximum CMOS Standby Current
120
Cypress Semiconductor Corporation
Document Number: 001-70167 Rev. *E
•
198 Champion Court
•
San Jose, CA 95134-1709
•
408-943-2600
Revised January 5, 2016