Infineon Technologies CY7C1355C-133AXCT

Overview

CY7C1355C-133AXCT 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, synchronous self-timed writes, three chip enables, and supports burst (linear/interleaved) and byte-write operations in high-speed networking packet buffers.

For engineers reviewing the CY7C1355C-133AXCT datasheet, CY7C1355C-133AXCT pinout, CY7C1355C-133AXCT application, or CY7C1355C-133AXCT equivalent, key selection criteria include NoBL™ latency elimination, 133 MHz synchronous timing, TQFP-100 package compatibility, VDDQ = 3.3 V/2.5 V I/O support, and IEEE 1149.1 JTAG boundary scan capability.

Technical Context

This SRAM implements a fully synchronous interface with all inputs registered on the rising edge of CLK, controlled by CEN. Its NoBL™ architecture eliminates bus dead cycles by enabling true back-to-back read/write transitions - data transfers occur on every clock cycle without wait-state insertion.

The device integrates internal burst logic for linear or interleaved addressing, synchronous write registry with BWx-controlled byte masking, and tri-state output drivers synchronized to write cycles to prevent bus contention. Sleep mode (ZZ) and CE-based power-down provide low standby current (40 mA max).

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 AS7C361024B-133BIN and IS61WV102436B-133TQLI, CY7C1355C-133AXCT uniquely delivers NoBL™ zero-latency operation, integrated burst logic, and JTAG testability - making it optimal for latency-sensitive, test-driven, high-reliability embedded systems.

Availability

CY7C1355C-133AXCT is available at Aetrix Electronics and suitable for network packet buffers, baseband signal processors, and radar data acquisition systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for CY7C1355C-133AXCT 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 management, automotive MCUs, and memory solutions for industrial and communications infrastructure.

This device belongs to Infineon's legacy Cypress synchronous SRAM product line, engineered specifically for high-throughput, low-latency data buffering in telecom, defense, and real-time control systems.

FAQ

What is the function of the ADV/LD pin in CY7C1355C-133AXCT?

The ADV/LD (Address Valid/Load) pin controls burst address generation mode: when asserted, it loads the initial address from A[17:0]; when deasserted, it advances the internal burst counter. This dual-mode operation supports both random-access and sequential burst transfers without external address management logic.

Does CY7C1355C-133AXCT support 2.5 V-only operation?

Yes - VDDQ is independently powered and accepts either 3.3 V or 2.5 V, while core VDD remains at 3.3 V. This allows direct interfacing with 2.5 V FPGAs or ASICs without level shifters, provided VDDQ stability and decoupling meet datasheet specifications (±5% tolerance, <100 mV ripple).

How does the ZZ (deep sleep) mode reduce power consumption?

Asserting ZZ places the SRAM in ultra-low-power state, disabling internal clocks and precharging bitlines. Typical standby current drops to <100 µA - over 400× lower than active standby (40 mA). Wake-up occurs within one clock cycle after CE activation, preserving data integrity without refresh.

Can CY7C1355C-133AXCT be used in place of ZBT™ SRAMs?

Yes - it is pin-compatible and functionally equivalent to ZBT™ devices (e.g., IDT 72V255), supporting identical control protocols, burst orders, and timing. Migration requires no PCB change, though layout validation for signal integrity at 133 MHz is recommended due to tighter tAC margin.