Infineon Technologies CY7C1352G-133AXC

Overview

CY7C1352G-133AXC from Cypress Semiconductor is a 4-Mbit (256K × 18) synchronous pipelined SRAM with NoBL™ architecture, designed for high-throughput memory subsystems requiring zero wait-state back-to-back read/write operations. It operates at 133 MHz with 4.0 ns clock-to-output delay, supports 3.3 V core and 2.5/3.3 V I/O supplies, and features byte write capability, linear/interleaved burst modes, and ZZ sleep mode - deployed in network packet buffers and FPGA co-processor caches.

For engineers reviewing the CY7C1352G-133AXC datasheet, CY7C1352G-133AXC pinout, CY7C1352G-133AXC application, or CY7C1352G-133AXC equivalent, key selection considerations include its 100-pin TQFP package, synchronous self-timed writes, CEN-controlled clock gating, ADV/LD-driven burst addressing, and mandatory external grounding of Pin 64 (ZZ) per errata.

Technical Context

The CY7C1352G-133AXC implements a fully pipelined synchronous interface where all inputs (address, BW[A:B], WE, CE1–CE3, ADV/LD, CEN) are registered on the rising CLK edge, and all outputs (DQs, DQP[A:B]) are edge-aligned via output registers. Its NoBL™ logic eliminates bus latency by enabling consecutive read/write cycles without inter-cycle gaps.

Burst operation is controlled by the MODE strap (linear vs. interleaved), A0/A1-fed internal 2-bit counter, and ADV/LD signal - which loads new addresses when LOW and advances the counter when HIGH. Write sequencing uses on-chip self-timed control, with OE masked during write data capture to prevent bus contention.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flat Package (TQFP), 14 mm × 20 mm × 1.4 mm body, lead-free (Pb-free) compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V251L133PF and IS61WV25618BLL-133TQLI, the CY7C1352G-133AXC uniquely combines ZZ sleep mode, dual-voltage I/O support, and errata-managed burst control - making it optimal for thermally constrained, multi-voltage, or power-cycled systems requiring guaranteed data retention.

Availability

CY7C1352G-133AXC is available at Aetrix Electronics and suitable for network packet buffering, FPGA co-processor caching, and telecom line card memory applications requiring stable component supply, long-lifecycle support, and Pb-free compliance.

Supply support for CY7C1352G-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

Cypress Semiconductor (now part of Infineon Technologies) is a fabless semiconductor company specializing in high-performance memory, microcontrollers, and programmable solutions for industrial, automotive, and communications markets.

The CY7C1352G belongs to Cypress's NoBL™ SRAM product line, engineered specifically to replace asynchronous and ZBT™ SRAMs in bandwidth-constrained systems where deterministic, wait-state-free memory access is essential.

FAQ

What is the correct handling for the ZZ pin on CY7C1352G-133AXC?

The ZZ pin (Pin 64) must be externally connected to ground, not left floating, as specified in the device errata (Document 38-05514 Rev. *O, page 19). Although the pin has an internal pull-down, failure to ground it externally may cause unreliable entry into or exit from sleep mode, risking data corruption during low-power transitions.

Does CY7C1352G-133AXC require an external output enable (OE) signal for normal read operation?

No - the CY7C1352G-133AXC uses internally self-timed output buffer control, eliminating dependency on OE for basic read timing. OE remains functional as an asynchronous override for tri-stating outputs, but it is masked during write data capture and first-clock post-deselect to prevent bus conflicts.

How does burst addressing work with ADV/LD and MODE pins?

When ADV/LD is HIGH, the internal 2-bit burst counter increments on each clock (regardless of CE state); when LOW, a new address is latched. MODE pin selects burst order: grounded for linear (0→1→2→3), tied to VDD for interleaved (0→2→1→3). Both modes wrap automatically using A0/A1.

Can CY7C1352G-133AXC operate with 2.5 V VDDQ while using 3.3 V VDD?

Yes - the device supports independent 3.3 V core supply (VDD) and 2.5 V or 3.3 V I/O supply (VDDQ), enabling direct interfacing with 2.5 V FPGAs or ASICs while maintaining full 133 MHz performance and 4.0 ns tCO, as verified in the Electrical Characteristics table (page 11 of datasheet 38-05514).