Infineon Technologies CY7C019V-15AXC

Overview

CY7C019V-15AXC from Cypress Semiconductor is a 3.3V, 128K × 9 true dual-port static RAM with 15 ns access time, on-chip arbitration logic, semaphores, and INT/BUSY flags for interprocessor communication. It supports independent asynchronous read/write on left and right ports, operates across commercial temperature range (0°C to +70°C), and is packaged in 100-pin TQFP for embedded multiprocessor buffering and video memory applications.

For engineers reviewing the CY7C019V-15AXC datasheet, CY7C019V-15AXC pinout, CY7C019V-15AXC application, or CY7C019V-15AXC equivalent, key selection considerations include dual-port arbitration timing (tBLA = 15 ns), CMOS-level standby current (ISB3 = 10 µA), M/S pin configuration for master/slave expansion, and x9 data bus support for 18-bit systems.

Technical Context

The CY7C019V-15AXC implements fully asynchronous dual-port architecture with separate address, data, and control buses per port (A0L–A16L/I/O0L–I/O8L/R/WL/OEL/CEL and A0R–A16R/I/O0R–I/O8R/R/WR/OER/CER). Arbitration is handled by hardware BUSY flag generation and priority resolution via tPS = 5 ns port setup timing.

Semaphore logic includes eight shared latches controllable by either port, enabling software handshaking without external logic; INT flag supports mailbox-style inter-port signaling with tINS/tINR = 15 ns set/reset timing. The M/S pin configures device role in 18-bit master/slave configurations without discrete glue logic.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Plastic Flatpack (TQFP), 14 mm × 14 mm body, 0.5 mm lead pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70V27L15PF and IS61WV12818BLL-15TLI, CY7C019V-15AXC uniquely integrates M/S pin configuration, on-chip semaphores, and dual BUSY/INT flags-reducing BOM count and eliminating arbitration firmware overhead in tightly coupled multiprocessor systems.

Availability

CY7C019V-15AXC is available at Aetrix Electronics and suitable for communications buffering, video frame memory, multiprocessor interconnect, and industrial PLC data exchange requiring stable component supply and long-term obsolescence management.

Supply support for CY7C019V-15AXC 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) designs high-reliability memory and programmable solutions for industrial, automotive, and communications markets.

The CY7C019V belongs to Cypress's dual-port SRAM product line, engineered specifically for deterministic interprocessor communication in real-time embedded systems with minimal external logic.

FAQ

What is the function of the M/S pin on CY7C019V-15AXC?

The M/S (Master/Slave) pin configures the device for 18-bit memory expansion without external logic: when asserted HIGH, it enables master mode with active BUSY output; when LOW, it enters slave mode with BUSY input. This allows two CY7C019V devices to form a seamless 128K × 18 memory array using dedicated CE0/CE1 and semaphore coordination.

How does the semaphore logic operate in CY7C019V-15AXC?

The CY7C019V-15AXC contains eight dedicated semaphore latches accessible via SEML/SEMR and address lines. Each latch can be atomically acquired or released by either port using specific control sequences. When a port holds a semaphore, the other port reads its state as busy until explicitly released-enabling robust software handshaking for shared peripheral access.

Can CY7C019V-15AXC retain data during power loss?

Yes - in data retention mode, CY7C019V-15AXC maintains stored data with VCC as low as 2.0 V and ICCDR1 ≤ 50 µA. To activate retention, both CE pins must be held HIGH within VCC to VCC – 0.2 V, and the device must remain unaccessed; this mode is validated across 0°C to +70°C ambient.

What distinguishes CY7C019V-15AXC from CY7C009V-15AXC?

CY7C019V-15AXC provides 128K × 9 organization with A0–A16 addressing and I/O0–I/O8 data bus, whereas CY7C009V-15AXC is 128K × 8 (I/O0–I/O7) with identical timing and package. The extra bit enables parity support or 18-bit expansion in master/slave configurations, making CY7C019V preferred for fault-tolerant or wide-data-path systems.