Infineon Technologies CY7C006A-20JC

Overview

CY7C006A-20JC from Cypress Semiconductor is a 16K × 8 true dual-port static RAM with independent left/right address, data, and control buses, 20 ns maximum access time, 180 mA typical active current, and 0.05 mA typical CMOS-level standby current. It enables simultaneous asynchronous read/write access to the same memory location in interprocessor communication systems using on-chip BUSY arbitration and semaphore logic.

For engineers reviewing the CY7C006A-20JC datasheet, CY7C006A-20JC pinout, CY7C006A-20JC application, or CY7C006A-20JC equivalent, this device supports deterministic port-to-port handshaking via INT/SEM flags, master/slave expansion for 16-bit bus width, and automatic power-down per port - critical for real-time embedded co-processor buffering and video frame store designs.

Technical Context

The CY7C006A-20JC implements fully asynchronous dual-port architecture with separate A0L–A13L/A0R–A13R address buses, I/O0L–I/O7L/I/O0R–I/O7R 8-bit data paths, and independent CE/OE/R/W control per port. Its on-chip arbitration resolves contention within tPS = 5 ns (min), asserting BUSYL/BUSYR outputs to stall conflicting accesses.

It integrates eight dedicated semaphore latches accessible via SEML/SEMR with A0–A2 addressing, enabling software-controlled resource locking without external logic. The M/S pin configures BUSY as output (master) or input (slave), supporting daisy-chained expansion to wider memory widths without discrete glue logic.

Key Specifications

Pinout & Package

68-pin PLCC (Plastic Leaded Chip Carrier) package with 27.94 mm × 27.94 mm body, 1.27 mm pitch, and J-lead profile - optimized for through-hole reflow assembly and thermal dissipation in dense PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70V25L20PF and IS61LV25616AL-20TQLI, the CY7C006A-20JC uniquely delivers 5V TTL compatibility, integrated BUSY/SEM/INT logic, and PLCC packaging - making it irreplaceable in legacy industrial controllers where board space, voltage alignment, and hardware synchronization are non-negotiable.

Availability

CY7C006A-20JC is available at Aetrix Electronics and suitable for interprocessor communication, dual-port video buffering, and industrial PLC data exchange requiring stable component supply across extended production lifecycles.

Supply support for CY7C006A-20JC 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) is a U.S.-based semiconductor company specializing in programmable solutions for embedded systems, USB connectivity, and memory products.

The CY7C006A belongs to Cypress's legacy dual-port SRAM product line, designed specifically for deterministic, low-latency memory sharing between heterogeneous processors in real-time industrial and communications equipment.

FAQ

What is the function of the M/S pin on CY7C006A-20JC?

The M/S (Master/Slave) pin configures the device's BUSY signal behavior: when HIGH, BUSYL and BUSYR become outputs for master-mode arbitration; when LOW, they become inputs for slave-mode operation. This enables daisy-chained expansion of memory width without external logic, directly supporting 16-bit or wider data paths using multiple CY7C006A devices.

How does semaphore operation work without external software coordination?

Semaphore latches are accessed via SEML/SEMR with A0–A2 addressing; writing '0' to I/O0 locks the latch, causing the opposite port to read '1' until release. The read value is latched to prevent corruption during concurrent writes. This atomic hardware mechanism ensures mutual exclusion for shared resources like UART buffers or configuration registers without OS or driver intervention.

Can CY7C006A-20JC operate with mixed 3.3 V and 5 V interfaces?

No - CY7C006A-20JC is strictly a 5 V device (VCC = 5.0 V ±10%). Its VIH = 2.2 V and VIL = 0.8 V thresholds are TTL-compatible but not 3.3 V–tolerant. Direct connection to 3.3 V logic risks input overvoltage and unreliable operation; level-shifting circuitry is required for interoperability with 3.3 V FPGAs or microcontrollers.

What happens during simultaneous write attempts to the same address?

When both ports assert CE and present matching addresses within tPS = 5 ns, on-chip arbitration asserts BUSYL or BUSYR to stall the losing port. The winning port completes its write; the stalled port retries after BUSY deasserts. If tPS is violated, arbitration still occurs but port priority becomes unpredictable - hence strict timing compliance is mandatory for deterministic behavior.