Infineon Technologies CY7C1471V33-133AXCT

Overview

CY7C1471V33-133AXCT from Cypress Semiconductor is a 72-Mbit (2M × 36) synchronous flow-through SRAM with NoBL™ architecture, designed for zero-wait-state back-to-back read/write operations in high-speed memory subsystems. It operates at 133 MHz, delivers 6.5 ns clock-to-output delay, supports linear/interleaved burst modes, and features byte-write capability with three chip enables (CE1–CE3) for depth expansion in networking and telecom line cards.

For engineers reviewing the CY7C1471V33-133AXCT datasheet, CY7C1471V33-133AXCT pinout, CY7C1471V33-133AXCT application, or CY7C1471V33-133AXCT equivalent, key selection criteria include synchronous self-timed write timing, ZZ sleep mode power control, registered input timing compliance, and JEDEC-standard 100-pin TQFP package compatibility with ZBT™-based systems.

Technical Context

The device implements a fully pipelined synchronous interface with rising-edge clock sampling of all control and address inputs. Its NoBL™ architecture eliminates bus latency by enabling consecutive read/write cycles without dead cycles - data transfers occur on every clock edge, supported by internal burst counters and ADV/LD-controlled address sequencing.

All writes are executed via on-chip synchronous self-timed circuitry, eliminating external write-strobe coordination. Output drivers are synchronously tri-stated during write data capture, and OE remains masked during write sequences to prevent bus contention - ensuring deterministic signal integrity in high-frequency memory buses.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V2135L133BG and IS61WV102436BLL-133TQLI, CY7C1471V33-133AXCT uniquely combines NoBL™ zero-latency flow-through operation, hardware-configurable burst order, and integrated ZZ sleep - making it optimal for latency-constrained, power-aware telecom and radar subsystems.

Availability

CY7C1471V33-133AXCT is available at Aetrix Electronics and suitable for telecom line cards, network packet buffers, and radar signal processing systems requiring stable component supply, long-lifecycle support, and guaranteed Pb-free compliance.

Supply support for CY7C1471V33-133AXCT 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

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

CY7C1471V33 belongs to Cypress's NoBL™ SRAM product line, engineered specifically to replace ZBT™ devices in bandwidth-intensive applications demanding deterministic, zero-wait-state memory access - particularly in infrastructure equipment with tight thermal and timing constraints.

FAQ

What is the function of the MODE pin on CY7C1471V33-133AXCT?

The MODE pin is a static strap input that selects burst address sequence order: tied to GND for linear burst (0,1,2,3), or to VDD/floating for interleaved burst (0,2,1,3). It is sampled only at power-up or reset - not dynamically changeable during operation - and directly configures the internal 2-bit burst counter logic without software intervention.

How does the ZZ pin behave, and what is the errata requirement?

The ZZ pin is an asynchronous active-HIGH sleep control input. Per Errata on page 19 of Rev. *V datasheet, Pin 64 (ZZ) must be externally connected to ground during normal operation - it is not left floating due to internal pull-down limitations. Failure to ground ZZ may cause unpredictable sleep entry/exit and increased standby current beyond 120 mA specification.

Can CY7C1471V33-133AXCT operate with 2.5 V I/O while maintaining 3.3 V core voltage?

Yes - VDDQ (I/O supply) is independently rated for 2.5 V or 3.3 V operation, while VDD (core supply) remains fixed at 3.3 V. This allows direct interfacing with 2.5 V FPGA I/O banks without level shifters, provided VDDQ = 2.5 V ±0.2 V and all AC timing parameters (e.g., tCDV = 6.5 ns) are verified under those conditions per Electrical Characteristics table.

Is CY7C1471V33-133AXCT pin-compatible with ZBT™ SRAMs like CY7C1371V33?

Yes - it is explicitly designed as pin- and functionally compatible with ZBT™ devices including CY7C1371V33. Identical 100-pin TQFP footprint, matching signal names (CE1/CE2/CE3, ADV/LD, BWx, etc.), and identical burst timing behavior enable drop-in replacement - though NoBL™ eliminates the need for OE control in most configurations due to self-timed output enable.