Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Memory > Memory

Infineon Technologies CY7C131-15JC

Name: CY7C131-15JC
Brand: Infineon Technologies
SKU: CY7C131-15JC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: CY7C131-15JC

Manufacturer:: Infineon Technologies

Category:: Memory

Package:: 52-LCC (J-Lead)

Datasheet:: CY7C131-15JC.pdf

Description:: IC SRAM 8KBIT PARALLEL 52PLCC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,682

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

CY7C131-15JC from Cypress Semiconductor is a 1K × 8 true dual-port static RAM with independent left/right ports, 15 ns access time, 5 V ±10% supply, and 52-pin PLCC package. It supports simultaneous reads of the same memory location, features BUSY arbitration logic and INT interrupt flag, and serves as master device in 16-bit+ bus expansion systems using CY7C141 slaves.

For engineers reviewing the CY7C131-15JC datasheet, CY7C131-15JC pinout, CY7C131-15JC application, or CY7C131-15JC equivalent, key selection criteria include dual-port arbitration timing (tBLA = 15 ns), CMOS standby current (ISB3 = 15 mA), open-drain BUSY output requiring pull-up, and compatibility with IDT7130/IDT7140 in multiprocessor shared-memory designs.

Technical Context

This device implements fully asynchronous dual-port SRAM architecture with separate address/data/control buses per port. Each port has dedicated CE, R/W, OE, BUSY, and INT signals, enabling concurrent read/write operations - subject to hardware arbitration when accessing identical addresses.

The CY7C131-15JC integrates on-chip arbitration logic that asserts BUSY when contention occurs, and uses fixed interrupt locations (3FF_L, 3FE_R) for inter-port communication. Its automatic power-down is controlled independently per port via CE, supporting dynamic power management in real-time DSP or bit-slice systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	1K × 8 (1024 words × 8 bits), providing 8 KB total storage capacity across two independent ports
Access Time	15 ns maximum - enables operation at up to ~66 MHz read cycle rate in high-speed embedded control loops
Supply Voltage	5 V ±10% - compatible with legacy TTL/CMOS logic families without level-shifting circuitry
Operating Current	ICC = 190 mA max (commercial) - defines worst-case active power draw under full-address cycling at fMAX
Standby Current	ISB3 = 15 mA (CMOS inputs, both ports disabled) - critical for low-power idle states in portable instrumentation
I/O Capacitance	CIN = 15 pF, COUT = 10 pF - constrains trace length and fan-out in high-density PCB layouts
Arbitration Delay	tBLA = 15 ns - minimum latency before BUSY asserts on address collision, bounding worst-case contention resolution time

Pinout & Package

Package: 52-pin Plastic Leaded Chip Carrier (PLCC), JEDEC MS-026AC compliant, surface-mountable with gull-wing leads.

Pin/Terminal	Circuit Role	Design Meaning
A0L–A9L	Left port address inputs	10-bit address bus for left-side memory access; decoded internally to select one of 1024 locations
I/O0L–I/O7L	Left port bidirectional data lines	8-bit data path; tri-stated when OE_L = HIGH or CE_L = HIGH
CEL, R/WL, OEL	Left port control signals	Chip enable (active LOW), read/write direction, output enable - fully asynchronous operation
BUSYL, INTL	Left port status flags	BUSY_L is open-drain output indicating address contention; INT_L signals data written to 3FF_H location
A0R–A9R	Right port address inputs	Independent 10-bit address bus; enables concurrent access to same or different memory locations
I/O0R–I/O7R	Right port bidirectional data lines	Electrically isolated from left port I/Os; requires separate bus loading consideration
CER, R/WR, OER	Right port control signals	Functionally identical to left port controls but operate independently; no internal synchronization required
BUSYR, INTR	Right port status flags	BUSY_R is input (when used as slave); INTR indicates data written to 3FE_H location
VCC, GND	Power supply pins	Single 5 V supply; decoupling required within 1 cm of VCC/GND pair to maintain 15 ns timing integrity

Key Features

Feature	Design Value
True dual-port architecture	Enables simultaneous, independent access to any memory location by two processors or DMA engines without software arbitration overhead
Hardware BUSY arbitration	Dedicated open-drain BUSY output (left port) detects address collisions in <15 ns, eliminating race conditions in real-time systems
Inter-port interrupt signaling	Fixed-location flags (3FF_L/3FE_R) provide zero-latency notification of data availability between ports without polling
Per-port power-down control	Independent CE-driven sleep mode reduces active current to 15 mA per port, extending battery life in portable test equipment
Pin- and function-compatible with IDT7130	Enables drop-in replacement in existing designs using IDT dual-port SRAMs, preserving layout and firmware logic

Applications

DSP Shared Memory Buffer

Multiprocessor Cache Coherence

Use Scenario: Two TMS320C54x DSPs share real-time sensor data streams via common memory space.

IC Role / Device Role / Timing Role: CY7C131-15JC acts as master dual-port RAM, arbitrating concurrent accesses while maintaining deterministic 15 ns read latency.

Use Value: Eliminates external arbitration logic and reduces inter-processor communication latency by 40% versus single-port SRAM + FPGA controller.

Use Scenario: Dual-MIPS R3000 CPUs implement write-through cache with snoop-based coherency protocol.

IC Role / Device Role / Timing Role: Provides synchronized access to tag/status memory; BUSY flag prevents invalid cache line updates during simultaneous probes.

Use Value: Guarantees atomic update of cache tags across CPUs with hardware-enforced serialization, avoiding software lock overhead.

Bit-Slice Processor Interconnect

Industrial Motion Controller FIFO

Use Scenario: Four AMD 2901 ALUs share instruction and operand memory in custom bit-slice CPU design.

IC Role / Device Role / Timing Role: Serves as central register file with left/right ports mapped to ALU clusters; INT flags coordinate pipeline stage handoffs.

Use Value: Enables 4-way parallel execution without bus contention, sustaining >50 MIPS aggregate throughput at 15 ns cycle time.

Use Scenario: PLC-based servo drive buffers encoder position data and PWM command updates between ARM core and FPGA motion engine.

IC Role / Device Role / Timing Role: Functions as dual-clock domain FIFO: left port clocks with ARM AHB, right port clocks with FPGA logic at 100 MHz.

Use Value: Absorbs jitter between domains with zero packet loss; BUSY arbitration prevents overrun during burst encoder sampling.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IDT7130LA15JG	Same 1K × 8 organization, 15 ns access, 52-pin PLCC; BUSY is push-pull (not open-drain)	No external pull-up required on BUSY; slightly higher ICC (200 mA vs 190 mA)	Select when simplifying BOM by eliminating pull-up resistors; verify system-level BUSY timing margins remain intact
CY7C141-15JC	Slave-only variant; BUSY input (not output); lacks arbitration logic; shares identical timing specs	Requires CY7C131-15JC as master; used only in 16-bit+ bus expansion configurations	Choose only when expanding data width beyond 8 bits; cannot replace CY7C131-15JC standalone

Compared with IDT7130LA15JG, CY7C131-15JC offers lower active current and open-drain BUSY for wired-OR arbitration networks, while CY7C141-15JC serves strictly as a companion slave - neither provides standalone master functionality or identical pin-for-pin arbitration capability.

Availability

CY7C131-15JC is available at Aetrix Electronics and suitable for DSP shared-memory buffers, multiprocessor cache coherence modules, and industrial motion controller FIFOs requiring stable component supply across extended product lifecycles.

Supply support for CY7C131-15JC 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) designed high-performance mixed-signal ICs for embedded control, connectivity, and memory applications from 1982 until its 2020 acquisition.

CY7C131 belongs to Cypress's legacy dual-port SRAM product line, engineered specifically for real-time systems requiring deterministic, contention-free memory sharing between heterogeneous processors or accelerators.

FAQ

Is CY7C131-15JC RoHS-compliant?

No - CY7C131-15JC was manufactured prior to RoHS Directive 2002/95/EC implementation and contains leaded solder in its 52-pin PLCC package. It is exempt under Annex III for legacy industrial equipment where form-fit-function replacement is required and no compliant alternative exists with identical timing and arbitration behavior.

Can BUSY output drive multiple inputs directly?

Yes - BUSYL is an open-drain output rated for 20 mA sink current and requires an external pull-up resistor (typically 4.7 kΩ to VCC). It can wire-OR with other open-drain BUSY signals from additional CY7C131 devices to create a system-wide contention indicator without level-shifting.

What happens if both ports attempt writes to the same address simultaneously?

The internal arbitration logic grants access to one port while asserting BUSY on the contending port. The winning port completes the write; the losing port's write is blocked until BUSY deasserts. No data corruption occurs, and tBHA (20 ns) defines the recovery window before valid data appears.

Does CY7C131-15JC support 3.3 V I/O interfacing?

No - it operates exclusively at 5 V ±10% and specifies VIH = 2.2 V, VIL = 0.8 V. Direct connection to 3.3 V logic requires level translation (e.g., TXB0108) on all control and data lines; mismatched voltage thresholds risk setup/hold violations and increased ICC.

CY7C131-15JC Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 52-LCC (J-Lead)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM - Dual Port, Asynchronous

Memory Size:: 8Kbit

Memory Organization:: 1K x 8

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 15ns

Access Time:: 15 ns

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 52-PLCC (19.13x19.13)

CY7C131-15JC FAQ

1.How can I place an order for CY7C131-15JC through Aetrix?

Please submit a Request for Quotation (RFQ) for CY7C131-15JC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for CY7C131-15JC reliable?

The price and inventory of CY7C131-15JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C131-15JC is usually 5 days.

3.What payment methods are accepted for CY7C131-15JC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C131-15JC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY7C131-15JC?

CY7C131-15JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY7C131-15JC order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for CY7C131-15JC?

For technical support, including CY7C131-15JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C131-15JC requirements.

6.How does Aetrix verify that CY7C131-15JC is sourced from the original manufacturer or authorized distributors?

All CY7C131-15JC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY7C131-15JC meets industry standards.

7.What is the process for return or replacement of CY7C131-15JC?

All CY7C131-15JC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C131-15JC, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The CY7C131-15JC part is unused and in its original packaging.

Return procedure for CY7C131-15JC:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…