Infineon Technologies CY7C1383C-100AC

Overview

CY7C1383C-100AC from Cypress Semiconductor is a 3.3V, 1-Mbit × 18-bit synchronous flow-through SRAM optimized for high-speed cache and buffer applications in Pentium-class microprocessor systems. It delivers 8.5 ns clock-to-output access time at 100 MHz, supports dual-burst modes (interleaved/linear), and operates with 2.5V or 3.3V I/O supply (VDDQ) while maintaining 3.3V ±5%/+10% core power (VDD). Its JEDEC-standard 100-pin TQFP package integrates separate ADSP/ADSC strobes, synchronous burst counter, and asynchronous ZZ sleep mode.

For engineers reviewing the CY7C1383C-100AC datasheet, CY7C1383C-100AC pinout, CY7C1383C-100AC application, or CY7C1383C-100AC equivalent, key selection criteria include burst sequence control via MODE pin, 2.5V/3.3V I/O flexibility, 100-MHz timing compliance, and compatibility with Intel Pentium-style address pipelining and depth-expansion chip enables (CE1–CE3).

Technical Context

The CY7C1383C-100AC implements a synchronous flow-through architecture where all address, data, and control inputs (except OE and ZZ) are registered on the rising edge of CLK. A 2-bit internal burst counter captures A[1:0] at the first clock and auto-increments addresses during burst cycles controlled by ADV, supporting both interleaved (MODE = HIGH) and linear (MODE = LOW) sequences.

It features dual asynchronous controls: OE enables tri-state output control independent of clock, and ZZ places the device in low-power sleep mode while preserving data integrity. The memory array uses synchronous self-timed write with byte-write enable (BWE) and four independent byte-write selects (BWA–BWD), allowing granular 18-bit data updates without full-word overhead.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flat Package (TQFP), JEDEC-compliant, 0.5 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous SRAM applications.

Compared with IS61LV102418-100TQLI and MT55LCS12818A-100:G, the CY7C1383C-100AC uniquely combines Intel-compatible burst sequencing, triple chip enable for depth expansion, and asynchronous ZZ sleep - making it irreplaceable in legacy Pentium-based designs requiring glueless integration and deterministic low-power behavior.

Availability

CY7C1383C-100AC is available at Aetrix Electronics and suitable for high-speed cache buffers, Pentium-class CPU interfaces, network packet buffers, and industrial motion controller memory requiring stable component supply across extended product lifecycles.

Supply support for CY7C1383C-100AC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor (now part of Infineon Technologies) is a U.S.-based semiconductor company specializing in high-performance memory, microcontrollers, and programmable logic solutions for industrial and computing markets.

The CY7C1383C belongs to Cypress's synchronous flow-through SRAM product line, engineered specifically for low-latency, burst-oriented memory subsystems in x86-compatible and real-time embedded systems.

FAQ

What is the function of the MODE pin on CY7C1383C-100AC?

The MODE pin is a static configuration input that selects burst addressing order: HIGH enables Intel Pentium-style interleaved bursts, while LOW enables linear bursts. It has an internal pull-up resistor and must remain stable during operation - no dynamic switching is allowed. This pin directly maps to CPU cache-line fetch behavior and eliminates software configuration overhead.

Can CY7C1383C-100AC operate with only 2.5V I/O supply and 3.3V core supply simultaneously?

Yes. The device supports independent VDD (3.3V ±5%/+10%) and VDDQ (2.5V or 3.3V) supplies. This allows direct connection to 2.5V FPGA I/O banks while maintaining full-speed 3.3V core operation. VSSQ must be tied to the same ground as VSS, and VDDQ must be powered before or concurrently with VDD to ensure proper I/O driver biasing.

How does the ZZ pin affect timing and power in CY7C1383C-100AC?

When ZZ is driven HIGH, the device enters non-time-critical sleep mode: core clocks halt, outputs go high-impedance, and standby current drops to 70 mA - independent of CLK or other control signals. Data is retained. Normal operation resumes within one clock cycle after ZZ returns LOW; no initialization sequence is required.

Why does CY7C1383C-100AC use separate ADSP and ADSC inputs instead of a single address strobe?

ADSP (Address Strobe Processor) and ADSC (Address Strobe Controller) provide hardware-level arbitration between CPU and cache controller address sources. When both are asserted, ADSP takes priority - enabling hierarchical memory management without external logic. This dual-strobe architecture eliminates glue logic in Pentium-compatible systems and supports simultaneous address capture from two independent masters.