Infineon Technologies CY7C1383D-133AXI

Overview

CY7C1383D-133AXI from Cypress Semiconductor is a 18-Mbit (1M × 18) synchronous flow-through SRAM with 133 MHz bus operation, 6.5 ns clock-to-output delay, 3.3 V core supply (VDD), 2.5 V/3.3 V I/O supply (VDDQ), and JEDEC-standard 100-pin TQFP packaging. It serves as high-speed cache or buffer memory in Pentium-class microprocessor systems requiring burst-mode interfacing with minimal glue logic.

For engineers reviewing the CY7C1383D-133AXI datasheet, CY7C1383D-133AXI pinout, CY7C1383D-133AXI application, or CY7C1383D-133AXI equivalent, key selection criteria include burst sequence mode (interleaved/linear), dual address strobe support (ADSP/ADSC), synchronous self-timed write timing, ZZ sleep mode behavior, and VDDQ voltage flexibility for mixed-voltage system integration.

Technical Context

This SRAM implements a synchronous, flow-through architecture with a 2-bit on-chip burst counter that auto-increments addresses during burst reads/writes. All address, data, and control inputs (except OE and ZZ) are registered on the rising edge of CLK, enabling precise timing alignment with high-speed processors.

Burst initiation is supported via either ADSP (processor address strobe) or ADSC (cache controller address strobe), with ADV controlling internal address advancement. The MODE pin selects interleaved (HIGH) or linear (LOW) burst sequences, directly mapping to Intel Pentium-compatible memory access patterns.

Key Specifications

Pinout & Package

Package: 100-pin TQFP (14 × 20 × 1.4 mm), RoHS-compliant, JEDEC-standard footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61WV102418BLL-133TQLI and MT55LSD128H18P-133:G, the CY7C1383D-133AXI uniquely supports both 2.5 V and 3.3 V I/O, includes hardware-selectable burst modes, and provides an asynchronous ZZ sleep input-making it optimal for cost-sensitive, mixed-voltage, legacy-compatible systems requiring deterministic timing.

Availability

CY7C1383D-133AXI is available at Aetrix Electronics and suitable for high-speed CPU cache, network packet buffering, and industrial motion control applications requiring stable component supply across extended product lifecycles.

Supply support for CY7C1383D-133AXI 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 fabless semiconductor company specializing in memory, microcontrollers, and programmable solutions for embedded systems.

The CY7C138xD series was designed specifically for high-speed, low-latency memory interfacing in x86-compatible and industrial control platforms where flow-through timing and burst compatibility reduce system-level timing margin pressure.

FAQ

What is the correct connection for the ZZ pin on CY7C1383D-133AXI?

The ZZ pin (Pin 64) must be externally connected to ground per documented errata. Although internally pulled down, grounding ensures reliable entry into and exit from sleep mode. Leaving it floating may cause intermittent sleep activation or increased standby current due to noise coupling.

Can CY7C1383D-133AXI operate with 2.5 V VDDQ while using 3.3 V VDD?

Yes - the device supports independent 3.3 V core (VDD) and 2.5 V I/O (VDDQ) supplies. This allows direct interfacing with 2.5 V logic families while maintaining full 133 MHz performance. VDDQ must be stable within ±0.15 V during operation.

How does the MODE pin affect burst addressing behavior?

When MODE = HIGH, the device executes interleaved burst sequences (e.g., 0→2→4→6…); when MODE = LOW, it executes linear bursts (e.g., 0→1→2→3…). This selection is latched on power-up and remains fixed until reset or power cycle - no runtime reconfiguration is supported.

Is JTAG boundary scan functional on CY7C1383D-133AXI?

JTAG is physically present and IEEE 1149.1-compliant, but functional verification is limited. Per errata, JTAG testing must be performed in BYPASS mode only; full instruction register or data register operations are not guaranteed and should not be relied upon for production test.