Cypress CY7C1365C manual Features, Selection Guide Functional Description1, MHz 100 MHz Unit

CY7C1365C

9-Mbit (256K x 32) Flow-Through Sync SRAM

Features

•256K x 32 common I/O

•3.3V core power supply (VDD)

•2.5V/3.3V I/O power supply (VDDQ)

•Fast clock-to-output times

— 6.5 ns (133-MHz version)

•Provide high-performance 2-1-1-1 access rate

•User-selectable burst counter supporting Intel® Pentium® interleaved or linear burst sequences

•Separate processor and controller address strobes

•Synchronous self-timed write

•Asynchronous output enable

•Supports 3.3V I/O level

•Available in JEDEC-standard lead-free 100-Pin TQFP package

•TQFP Available with 3-Chip Enable and 2-Chip Enable

•“ZZ” Sleep Mode option

Selection Guide

Functional Description[1]

The CY7C1365C is a 256K x 32 synchronous cache RAM designed to interface with high-speed microprocessors with minimum glue logic. Maximum access delay from clock rise is

6.5ns (133-MHz version). A 2-bit on-chip counter captures the first address in a burst and increments the address automati- cally for the rest of the burst access. 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[2]), Burst Control inputs (ADSC, ADSP, and ADV), Write Enables (BW[A:D], and BWE), and Global Write (GW). Asynchronous inputs include the Output Enable (OE) and the ZZ pin.

The CY7C1365C allows either interleaved or linear burst sequences, selected by the MODE input pin. A HIGH selects an interleaved burst sequence, while a LOW selects a linear burst sequence. Burst accesses can be initiated with the Processor Address Strobe (ADSP) or the cache Controller Address Strobe (ADSC) inputs. Address advancement is controlled by the Address Advancement (ADV) input.

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).

The CY7C1365C 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.

	133 MHz	100 MHz	Unit
Maximum Access Time	6.5	8.5	ns
Maximum Operating Current	250	180	mA
Maximum Standby Current	40	40	mA

Notes:

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

2.CE3 is not available on 2 Chip Enable TQFP package.

Cypress Semiconductor Corporation	•	198 Champion Court • San Jose, CA 95134-1709	•	408-943-2600
Document #: 38-05690 Rev. *E		Revised September 14, 2006

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