Infineon Technologies CY7C1373KV33-133AXI

Overview

CY7C1373KV33 from Cypress Semiconductor is a 18-Mbit synchronous flow-through SRAM with NoBL™ architecture and on-chip ECC, configured as 512K × 36 or 1M × 18. It supports true back-to-back read/write operations at 133 MHz with zero wait states, 6.5 ns clock-to-output delay, and 3.3 V/2.5 V I/O (VDDQ). Used in high-throughput packet buffering and network switching ASIC interfaces.

For engineers reviewing the CY7C1373KV33 datasheet, CY7C1373KV33 pinout, CY7C1373KV33 application, or CY7C1373KV33 equivalent, key selection criteria include burst order control (linear/interleaved), synchronous byte write capability, ZZ sleep mode, three chip enables for depth expansion, and ECC-enabled soft error mitigation in mission-critical memory paths.

Technical Context

The device implements a synchronous, clocked interface with registered inputs sampled on the rising edge of CLK, qualified by CEN. All writes are self-timed and controlled by WE and four byte-write signals (BWA–BWD), enabling granular 8-bit data updates without bus turnaround overhead.

Burst addressing is managed internally via a two-bit counter driven by A[1:0] and ADV/LD, supporting both linear and interleaved sequences selected by the MODE strap pin. Output drivers are synchronously tristated during write data cycles, eliminating external bus contention management.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with AS7C33128P-133JCIN and IS61WV102432BLL-133TQLI, CY7C1373KV33 uniquely combines ECC, selectable burst order, and dual-voltage VDDQ in a 100-pin TQFP - making it optimal for new designs where data integrity and interface flexibility are non-negotiable.

Availability

CY7C1373KV33 is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, and radar signal processing requiring stable component supply and long-term industrial availability.

Supply support for CY7C1373KV33 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 automotive, industrial, and communications markets.

This device belongs to Cypress's NoBL™ SRAM product line, engineered specifically for zero-wait-state, back-to-back memory access in bandwidth-constrained ASIC/FPGA interconnects and real-time signal processing subsystems.

FAQ

What is the function of the MODE pin on CY7C1373KV33?

The MODE pin is a static strap input that selects burst addressing order: tied to GND for linear burst (sequential address increment), or to VDD/floating for interleaved burst (bit-reversed increment). It is sampled only at power-up or reset, not dynamically during operation, and requires no external driver circuitry beyond pull-up/down resistors.

How does the ZZ sleep mode affect timing and power consumption?

When ZZ is asserted HIGH, the device enters a non-time-critical sleep state with data retention; core clocks halt and I/O drivers enter high-impedance. Power drops to ≤5 mA typical. No timing specifications apply during sleep, and recovery to active operation requires only one valid CLK cycle after ZZ returns LOW - no reset or initialization sequence needed.

Can CY7C1373KV33 operate with mixed VDD (3.3 V) and VDDQ (2.5 V) supplies?

Yes - VDD must be 3.3 V ±10% for core logic, while VDDQ may be independently set to either 2.5 V ±10% or 3.3 V ±10% to match interfacing ASIC/FPGA I/O voltage. This allows seamless integration into mixed-voltage systems without level shifters, provided VDDQ does not exceed VDD.

Is the ECC functionality configurable or always enabled?

ECC is hardwired and always active - there is no disable control. The SRAM automatically encodes parity bits on every write and decodes/corrects on every read. Single-bit errors are transparently corrected in hardware; double-bit errors trigger a detectable flag condition on DQP lines, allowing host software to initiate recovery actions.