CYPRESS CY7C136-55JC PLCC52

Mfr. Part

CY7C136-55JC PLCC52

Manufacturer

Cypress Semiconductor

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Detailed Description

CY7C136-55JC is a Cypress Dual-Port Static RAM (DP SRAM), asynchronous, 55 ns access, in a PLCC-52 package. It lets two systems (two buses) read and write the same memory at the same time through independent ports, with built-in arbitration to prevent conflicts. Category: Integrated Circuits (ICs). Classification: Specialized ICs. This device is ideal for shared-memory designs, mailboxes, and high-throughput buffers between CPUs, MCUs, FPGAs, or DSPs.

Key Features

Two fully independent ports (A and B) for concurrent access

On-chip arbitration (semaphores, busy/interrupt logic) to prevent collisions

55 ns access time, asynchronous (no external clock needed)

TTL/CMOS-compatible I/O

Single 5 V supply (typical for JC variants)

Byte-wide interface per port (refer to datasheet for bus width and exact pinout)

Separate CS, OE, WE control signals per port

Tri-state outputs for easy bus sharing

Supports simultaneous operations to different addresses

Key Advantages

Simplifies multiprocessor communication — no external arbitration glue logic

Deterministic low-latency memory access for real-time systems

Enables true parallel read/write paths to boost throughput

Mature, proven architecture with broad ecosystem support

Low power and low heat, easy to integrate and operate

Packaging

Type: PLCC-52 (Plastic Leaded Chip Carrier with 52 J-leads)

Material: Molded epoxy body; copper alloy lead frame; tin-plated J-leads

Size: Compact square PLCC footprint; standard 1.27 mm lead pitch; socket-friendly

Pin configuration: 52 pins including Address, Data, per-port controls (CS, OE, WE), Busy/INT/Semaphore pins; see datasheet for the full pin map

Thermal characteristics: Low-power SRAM; typically no heatsink required; follow JEDEC PLCC guidelines for thermal performance

Electrical properties: 5 V VCC (typical for JC), TTL/CMOS input levels, 55 ns access, tri-stated outputs; consult datasheet for exact limits and timings

Lifecycle

Status: Mature legacy product. Some speed grades and packages are NRND or EOL depending on region and date. Availability can vary.

Alternatives and equivalents (verify pinout, voltage, speed, and timing before use):

- Cypress Dual-Port SRAM family: CY7C130 / CY7C131 / CY7C134 / CY7C135 / CY7C136 series in similar PLCC packages and speed grades

- Renesas (IDT) Dual-Port SRAM: IDT7130 / IDT7132 / IDT7134 / IDT7135 families (PLCC/DIP/TSOP) commonly used as drop-in DP SRAM options

- ISSI Dual-Port SRAM: IS61 / IS65 DP SRAM series with comparable densities and timings

- GSI Technology and MoSys offer DP SRAMs; check compatibility for package and signals

If you need an exact pin-compatible replacement for CY7C136-55JC PLCC52 and do not see it listed, contact Y-IC via our website. Our sales and engineering teams will help identify the best equivalent.

Key Application Areas

Inter-processor mailboxes and shared-memory in multiprocessor systems

Network and telecom shared buffers in routers, switches, and base stations

Video/graphics frame buffers and arbitration

Industrial control, motion control, PLCs, and robotics

Printer controllers, imaging systems, embedded systems with dual-bus access

Test/measurement equipment, data acquisition, and FPGA/MCU co-processing

Datasheet

Y-IC hosts the most authoritative datasheet for CY7C136-55JC PLCC52 on this page. Download it now to confirm capacity, full pinout, electrical limits, timing, and recommended operating conditions.

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