Infineon Technologies CY7C1351G-100AXCT

Overview

CY7C1351G-100AXCT from Infineon Technologies (formerly Cypress) is a 4-Mbit (128K × 36) synchronous flow-through SRAM with NoBL™ architecture, designed for zero-wait-state, back-to-back read/write operations in high-bandwidth memory subsystems. It operates at 100 MHz with 8.0 ns clock-to-output delay, supports 2.5 V/3.3 V I/O (VDDQ), and features registered inputs, byte write capability, and linear/interleaved burst modes.

For engineers reviewing the CY7C1351G-100AXCT datasheet, CY7C1351G-100AXCT pinout, CY7C1351G-100AXCT application, or CY7C1351G-100AXCT equivalent, key selection criteria include synchronous burst timing, 100-pin TQFP package compatibility, ZZ sleep mode control, and functional equivalence to ZBT™ SRAMs in telecom and networking buffer designs.

Technical Context

The CY7C1351G-100AXCT implements a fully pipelined, synchronous interface with rising-edge clock sampling for all control and address inputs. Its NoBL™ logic eliminates bus latency by enabling consecutive read/write cycles without wait states, using an internal burst counter driven by A0/A1 and controlled by ADV/LD and MODE pins.

It integrates synchronous self-timed write circuitry, three chip enables (CE1 active-low, CE2 active-high, CE3 active-low), asynchronous OE, and dedicated byte write selects (BWA–BWD). Output drivers are synchronously tristated during write data phases to prevent bus contention, and ZZ pin enables low-power sleep mode with data retention.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flat Package (TQFP), RoHS-compliant, body size 14 mm × 20 mm × 1.4 mm, lead pitch 0.5 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V2115L10PF and IS61WV102436B, the CY7C1351G-100AXCT uniquely delivers zero-wait-state back-to-back operation with integrated sleep control, making it optimal for latency-constrained telecom buffers where both throughput and dynamic power scaling matter.

Availability

CY7C1351G-100AXCT is available at Aetrix Electronics and suitable for telecom infrastructure, network switching, and industrial real-time data acquisition requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for CY7C1351G-100AXCT 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 high-performance memory solutions.

The CY7C1351G belongs to Infineon's legacy Cypress synchronous SRAM product line, engineered for ultra-low-latency, high-reliability memory buffering in carrier-grade communications equipment and mission-critical embedded systems.

FAQ

What is the function of the MODE pin on CY7C1351G-100AXCT?

The MODE pin is a static strap input that configures the on-chip burst counter's address sequence. When tied to GND, it selects linear burst order (0,1,2,3); when tied to VDD or left floating, it selects interleaved burst order (0,2,1,3). This setting must be stable before initialization and remains fixed during operation - it is not dynamically reconfigurable.

Why must the ZZ pin be externally connected to ground?

Per documented errata (page 19, Rev. *R), Pin 64 (ZZ) requires external grounding to ensure reliable operation. Although the pin has an internal pull-down, unconnected or floating ZZ causes undefined sleep-mode behavior and potential data corruption during power transitions. Grounding eliminates this risk and guarantees deterministic low-power state entry/exit.

How does the CY7C1351G-100AXCT handle bus contention during write cycles?

The device automatically tristates all DQ and DQP outputs during the data portion of any write sequence - regardless of OE state - using synchronous internal control logic. This prevents bus contention without requiring external bus transceivers or OE timing coordination, simplifying PCB layout and reducing system-level timing constraints.

Is CY7C1351G-100AXCT pin-compatible with ZBT™ SRAMs?

Yes - the CY7C1351G-100AXCT is explicitly designed to be pin-compatible and functionally equivalent to industry-standard ZBT™ SRAMs (e.g., IDT72V2115 series), including identical 100-pin TQFP footprint, signal naming, and burst timing behavior. No PCB redesign is needed for drop-in replacement in existing ZBT™-based systems.