Infineon Technologies CY7C1357C-133AXC

Overview

CY7C1357C-133AXC from Infineon Technologies (formerly Cypress) is a 9-Mbit synchronous flow-through SRAM with NoBL™ architecture, configured as 512K × 18, operating at 133 MHz with zero wait states and 6.5 ns clock-to-output delay. It supports true back-to-back read/write cycles, features synchronous self-timed writes, and uses 3.3 V/2.5 V I/O (VDDQ) for flexible system interfacing in high-speed networking buffers.

For engineers reviewing the CY7C1357C-133AXC datasheet, CY7C1357C-133AXC pinout, CY7C1357C-133AXC application, or CY7C1357C-133AXC equivalent, key selection criteria include burst mode support (linear/interleaved), three chip enables for depth expansion, JTAG boundary scan compliance, and ZZ sleep mode for low-power standby operation.

Technical Context

The CY7C1357C implements a synchronous flow-through architecture where all inputs are registered on the rising edge of CLK, and output data is driven without OE dependency due to internal self-timed buffer control. Its NoBL™ logic eliminates bus idle cycles between consecutive read and write operations.

Burst capability supports both linear and interleaved address orders, and write operations are managed by synchronous byte-write selects (BWA–BWD) and WE, with automatic data coherency maintained via on-chip write registry. Sleep mode is entered via ZZ pin or CE deselection, reducing standby current to 40 mA.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V2115L133BG and IS61WV51218BLL-133TQLI, the CY7C1357C-133AXC uniquely delivers true back-to-back access with no bus latency, integrated JTAG testability, and sub-µA ZZ sleep - making it optimal for space-constrained, power-aware telecom and embedded control systems requiring deterministic timing.

Availability

CY7C1357C-133AXC is available at Aetrix Electronics and suitable for network packet buffering, telecom line card caching, and industrial PLC data logging requiring stable component supply and long-term lifecycle support.

Supply support for CY7C1357C-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

Infineon Technologies is a global semiconductor leader focused on power systems, automotive MCUs, and memory solutions, with headquarters in Munich, Germany.

The CY7C1357C belongs to Infineon's legacy Cypress synchronous SRAM product line, engineered specifically for high-throughput, low-latency buffering in networking, telecom, and real-time industrial systems.

FAQ

What is the difference between CY7C1355C and CY7C1357C?

The CY7C1355C is configured as 256K × 36 (9 Mbit), while the CY7C1357C is 512K × 18 (also 9 Mbit). They share identical timing, NoBL™ architecture, and pinout in TQFP packages, but differ in data width organization and byte-write pin mapping - CY7C1357C uses BWA/BWB only, whereas CY7C1355C uses all four (BWA–BWD).

Does CY7C1357C-133AXC support interleaved burst mode?

Yes - the device supports both linear and interleaved burst orders, selectable via the MODE pin. Interleaved mode aligns with Intel Pentium-style burst sequences and is commonly used in x86-compatible embedded controllers and FPGA-based accelerators.

Can VDDQ be operated at 2.5 V while core VDD remains at 3.3 V?

Yes - VDDQ is independently supplied and rated for 2.5 V ±0.2 V or 3.3 V ±0.3 V, allowing direct interface to 2.5 V FPGAs or ASICs while maintaining 3.3 V core logic operation, as confirmed in the DC characteristics table (Rev. *N, p.21).

Is JTAG boundary scan enabled by default?

No - JTAG is disabled at power-up. It must be enabled via the TAP controller using the ENABLE instruction (0x04), as specified in the IEEE 1149.1 section (Rev. *N, pp.13–14); default operation uses standard SRAM functionality without scan overhead.