Cypress Semiconductor Corp CY7C135-20JCT

Mfr. Part

CY7C135-20JCT

Manufacturer

Cypress Semiconductor. Y-IC is a trusted quality distributor for Cypress products and we will provide you with the best products, fast service, and expert support.

Detailed Description

32 Kbit dual-port asynchronous SRAM, organized as 4K x 8. Parallel interface. 5 V supply (4.5 V to 5.5 V). 20 ns access time and 20 ns write cycle. Commercial temperature 0°C to 70°C. Surface-mount PLCC-52 with J-leads. Bulk packaging. RoHS not applicable.

Key Features

True dual-port SRAM for concurrent access from two systems

Asynchronous operation, no clock required

Parallel interface, easy to drop into legacy and existing designs

Fast 20 ns read access and 20 ns write cycle

5 V operation, TTL-compatible I/O

Memory organization 4K x 8 (32 Kbit total)

Separate control signals per port (typical CE, OE, WE)

Collision management and bus arbitration signals common to Cypress dual-port families

Volatile memory, no refresh needed

Key Advantages

Simple integration with 5 V TTL logic and parallel buses

Low latency random access for time-critical paths

Enables clean inter-processor communication and shared memory architectures

Proven, mature platform widely used in industrial and communications equipment

PLCC-52 J-lead package supports socketing and robust surface mounting

Ideal for maintaining and extending legacy systems that require 5 V dual-port SRAM

Packaging

Type: Bulk

Package family: 52-PLCC (Plastic Leaded Chip Carrier)

Material: Molded plastic body with J-lead tin/lead plating (RoHS not applicable)

Size: 19.13 mm x 19.13 mm nominal body outline

Mounting: Surface mount, J-leads provide strain relief and reliable solder joints

Pin configuration: 52 leads around the perimeter; dual port architecture with separate address/data/control per port (typical 12 address lines per port for 4K depth, 8-bit data bus per port, CE/OE/WE control)

Thermal characteristics: Commercial operation 0°C to 70°C; follow datasheet thermal guidelines for layout and airflow

Electrical properties: 4.5 V to 5.5 V VCC, TTL-compatible I/O, 20 ns access, 20 ns write, asynchronous read/write

Supplier device package: 52-PLCC (19.13 x 19.13)

Base product number: CY7C135

Lifecycle

Status: Mature legacy part. Availability can be limited in some regions and packages. Not RoHS compliant.

Discontinuation risk: Many older 5 V dual-port SRAMs are approaching end-of-life. Plan for lifecycle risk mitigation in new designs.

Equivalent or alternative models to consider

- Same family and speed-grade variants within Cypress CY7C135 series (different speed and temperature options). Contact us to match exact suffix and specifications.

- Renesas (IDT) IDT7134 series dual-port SRAM, 4K x 8, available in multiple speed grades and packages (SA, LA variants). Check pinout and control signal compatibility.

- Consider larger or newer dual-port SRAM families if capacity or RoHS compliance is required; we will help map to pin-compatible or functionally compatible parts.

If you need a pin-for-pin or functionally equivalent replacement, or RoHS-compliant alternatives, please contact our sales team via Y-IC.com for a detailed cross-reference and availability.

Key Application Areas

Inter-processor communication and shared memory between two CPUs or microcontrollers

Telecom and networking equipment (switch fabrics, packet processing)

Industrial control systems and PLCs needing deterministic shared data

Imaging, instrumentation, and medical devices

Printer and copier controllers

RAID/storage controllers and bus arbitration buffers

Legacy system maintenance where 5 V dual-port SRAM is required

Datasheet

Our website hosts the most authoritative and up-to-date datasheet for CY7C135-20JCT. We recommend downloading the datasheet directly from this product page on Y-IC for complete electrical specifications, timing diagrams, pin descriptions, and mechanical details.

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