Infineon Technologies CY7C1355C-133AXC

Overview

CY7C1355C-133AXC from Infineon Technologies (formerly Cypress) is a 9-Mbit synchronous flow-through SRAM with NoBL™ architecture, configured as 256K × 36-bit, operating at 133 MHz with zero wait states and 6.5 ns clock-to-output delay. It features registered inputs, byte write capability, three chip enables (CE1–CE3), and supports burst reads in linear or interleaved order for high-throughput memory subsystems in network packet buffers.

For engineers reviewing the CY7C1355C-133AXC datasheet, CY7C1355C-133AXC pinout, CY7C1355C-133AXC application, or CY7C1355C-133AXC equivalent, key selection criteria include synchronous self-timed writes, JTAG boundary-scan compliance (IEEE 1149.1), ZZ sleep mode power management, and TQFP-100 package compatibility with ZBT™-class timing interfaces.

Technical Context

This SRAM implements a true flow-through architecture where read and write operations execute back-to-back without bus latency-data transfers occur on every clock edge. Its internal logic uses rising-edge clocked input registers, synchronous self-timed write control, and tri-state output drivers qualified by OE and clock enable (CEN).

The device supports both single and burst access modes, with programmable burst order (linear/interleaved), automatic output buffer control eliminating external OE timing constraints, and depth expansion via three independent chip enables. Sleep mode is entered via ZZ pin or CE deselection, reducing standby current to 40 mA.

Key Specifications

Pinout & Package

Package: 100-pin TQFP (14 × 20 × 1.4 mm), RoHS-compliant, Pb-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V2115L133BG and IS61WV102436BLL-133TQLI, the CY7C1355C-133AXC uniquely integrates NoBL™ latency elimination, ZZ deep-sleep control, and production-ready JTAG testability-making it optimal for new designs prioritizing timing determinism, power efficiency, and manufacturing testability.

Availability

CY7C1355C-133AXC is available at Aetrix Electronics and suitable for network packet buffers, telecom line card caches, and industrial PLC data loggers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for CY7C1355C-133AXC 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

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power systems, sensors, and memory solutions for industrial, automotive, and communications markets.

This device belongs to Infineon's legacy Cypress synchronous SRAM product line, engineered specifically for high-throughput, low-latency memory subsystems in networking and telecom infrastructure where deterministic timing and burst efficiency are critical.

FAQ

What is the difference between CY7C1355C and CY7C1357C?

The CY7C1355C is organized as 256K × 36 bits (9 Mbit), while the CY7C1357C is 512K × 18 bits (9 Mbit) - same density but different width/depth mapping. They share identical timing, pinout (in TQFP), and feature set, but require different address decoding logic due to distinct memory geometry.

Does CY7C1355C-133AXC support 2.5 V I/O operation?

Yes - VDDQ is independently powered and supports either 3.3 V or 2.5 V, allowing direct interface with 2.5 V FPGAs or ASICs. VDD remains at 3.3 V for core logic; only the DQ pins and associated I/O circuitry operate at the selected VDDQ level.

How does the ZZ pin function during sleep mode?

Asserting ZZ places the device in deep power-down mode, reducing ICC to 40 mA while retaining all stored data. The part wakes instantly upon ZZ deassertion, with no initialization delay - unlike asynchronous SRAMs that require recovery time after power-up.

Is JTAG boundary scan enabled by default?

Yes - IEEE 1149.1 boundary scan is factory-enabled and active whenever TCK is toggled with TMS = 1. It can be disabled via the JTAG instruction register if board-level test is not required, but no hardware modification is needed for standard operation.