Infineon Technologies CY7C1473BV33-133AXC

Overview

CY7C1473BV33 from Cypress Semiconductor is a 72-Mbit (4M × 18) synchronous flow-through SRAM with NoBL™ architecture, designed for high-throughput memory buffering in network packet processors and telecom line cards. It supports 133 MHz zero-wait-state bus operation, delivers 6.5 ns clock-to-output timing, and features synchronous self-timed writes, three chip enables (CE1/CE2/CE3), and asynchronous output enable (OE). Used in backplane interface buffers requiring true back-to-back read/write transitions.

For engineers reviewing the CY7C1473BV33 datasheet, CY7C1473BV33 pinout, CY7C1473BV33 application, or CY7C1473BV33 equivalent, key selection criteria include burst order configuration (linear/interleaved via MODE pin), byte-write select granularity (BWA/BWB), ZZ sleep mode power control, and TQFP-100 package compatibility with JEDEC-standard footprint.

Technical Context

This SRAM implements a synchronous, registered-input flow-through architecture where all address, control, and data inputs are latched on the rising edge of CLK, qualified by CEN. The internal burst counter advances on ADV/LD HIGH, enabling linear or interleaved burst sequences selected by the MODE strap pin.

Write operations use on-chip self-timed logic synchronized to CLK, eliminating external write pulse timing constraints. Output drivers are synchronously tri-stated during write data cycles and upon chip deselect, preventing bus contention without OE coordination.

Key Specifications

Pinout & Package

Package: JEDEC-standard Pb-free 100-pin thin quad flat pack (TQFP), 14 mm × 20 mm × 1.4 mm body height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V2115L133PF and IS61WV102418BLL-133TQLI, CY7C1473BV33 uniquely delivers NoBL™ zero-dead-cycle throughput, MODE-configurable burst sequencing, and hardware-managed ZZ sleep - making it optimal for latency- and power-sensitive telecom and defense signal processing.

Availability

CY7C1473BV33 is available at Aetrix Electronics and suitable for network packet buffering, telecom line card caching, and radar signal processing applications requiring stable component supply, long-term lifecycle assurance, and JEDEC-compliant TQFP packaging.

Supply support for CY7C1473BV33 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) designs high-performance memory and programmable solutions for communications, industrial, and automotive markets.

CY7C1473BV33 belongs to Cypress's NoBL™ SRAM product line, engineered specifically to eliminate bus latency in high-speed packet-forwarding and real-time signal processing systems.

FAQ

What is the function of the MODE pin on CY7C1473BV33?

The MODE pin is a static configuration input that selects burst address sequence behavior: tied to GND for linear burst (sequential address increment), or to VDD/floating for interleaved burst (address toggles MSB for cache-friendly access). It is sampled only at power-up or reset and cannot be changed dynamically during operation.

How does the ZZ sleep mode interact with chip enable signals?

ZZ sleep mode operates independently of CE1/CE2/CE3 states. When ZZ is driven HIGH, the device enters low-power retention regardless of chip enable status. CE signals remain functional during ZZ mode, allowing immediate wake-up and resumption of access upon ZZ deassertion - no reinitialization or timing recovery is required.

Can CY7C1473BV33 operate with 2.5 V I/O while maintaining 3.3 V core voltage?

Yes. VDDQ (I/O supply) and VDD (core supply) are independent. The device supports VDDQ = 2.5 V and VDD = 3.3 V simultaneously, enabling direct interfacing with 2.5 V logic families while retaining full 133 MHz performance and 6.5 ns access timing - verified per AC electrical specifications in the datasheet.

Is JTAG boundary scan supported in the TQFP-100 package?

No. The TQFP-100 package omits the TDO pin required for IEEE 1149.1 boundary scan output. JTAG functionality is only fully implemented in the 165-ball FBGA variant. For TQFP users, JTAG-based testing must rely on external emulation or alternative verification methods.