Cypress CY7C1440AV33, CY7C1446AV33 manual Features, Functional Description1, Selection Guide

CY7C1440AV33

CY7C1442AV33

CY7C1446AV33

36-Mbit (1M x 36/2M x 18/512K x 72) Pipelined Sync SRAM

Features

•Supports bus operation up to 250 MHz

•Available speed grades are 250, 200 and 167 MHz

•Registered inputs and outputs for pipelined operation

•3.3V core power supply

•2.5V/3.3V I/O power supply

•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

•Single Cycle Chip Deselect

•CY7C1440AV33, CY7C1442AV33 available in lead-free 100-pin TQFP package, lead-free and non-lead-free 165-ball FBGA package. CY7C1446AV33 available in lead-free and non-lead-free 209-ball FBGA package

•Also available in lead-free packages

•IEEE 1149.1 JTAG-Compatible Boundary Scan

•“ZZ” Sleep Mode Option

Functional Description[1]

The CY7C1440AV33/CY7C1442AV33/CY7C1446AV33 SRAM integrates 1M x 36/2M x 18 and 512K x 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.

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 two or four bytes wide as controlled by the byte write control inputs. GW when active LOW causes all bytes to be written.

The CY7C1440AV33/CY7C1442AV33/CY7C1446AV33 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.

Selection Guide

	250 MHz	200 MHz	167 MHz	Unit
Maximum Access Time	2.6	3.2	3.4	ns
Maximum Operating Current	475	425	375	mA
Maximum CMOS Standby Current	120	120	120	mA

Note:

1. For best-practices recommendations, please refer to the Cypress application note System Design Guidelines on www.cypress.com.

Cypress Semiconductor Corporation	•	198 Champion Court • San Jose, CA 95134-1709	•	408-943-2600
Document #: 38-05383 Rev. *E		Revised June 23, 2006

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