Renesas 70V27S15PF

Overview

70V27S15PF from Integrated Device Technology is a high-speed 32K × 16 dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same address, 15 ns maximum read cycle time (tRC), LVTTL-compatible 3.3 V ±0.3 V single supply, and integrated on-chip port arbitration logic for real-time inter-processor communication in embedded control systems.

For engineers reviewing the 70V27S15PF datasheet, 70V27S15PF pinout, 70V27S15PF application, or 70V27S15PF equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial temperature operation (−40°C to +85°C), and two rigorously cross-checked alternative parts for bus-width expansion, semaphore-based synchronization, and master/slave memory architectures.

Technical Context

The 70V27S15PF implements fully asynchronous dual-port architecture with independent left/right address, control, and I/O buses-enabling concurrent read/write operations without external arbitration logic. Its on-chip semaphore logic supports eight hardware flags addressed via A0–A2, with dedicated SEM, INT, and BUSY signaling for deterministic inter-port coordination.

It features dual chip enables (CE0/CE1) per port for selective power-down, separate upper-byte (UB) and lower-byte (LB) controls for 8-bit sub-word access, and push-pull BUSY/INT outputs (non-tri-state) that function as outputs in Master mode (M/S = VIH) and inputs in Slave mode (M/S = VIL).

Key Specifications

Pinout & Package

70V27S15PF is housed in a 100-pin Thin Quad Flatpack (TQFP) with 0.5 mm pitch, body size 14 mm × 14 mm × 1.4 mm. All VDD pins require local decoupling; all VSS pins must be connected to ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC and R1EX24032AS0C-15, the 70V27S15PF uniquely combines industrial temperature rating, hardware M/S cascading, and sub-20 ns BUSY-to-data delay-making it the sole choice for safety-critical, wide-bus, and thermally demanding dual-processor architectures.

Availability

70V27S15PF is available at Aetrix Electronics and suitable for industrial PLC communication buffers, automotive ADAS sensor fusion memory, and medical imaging data pipelines requiring stable component supply across long production lifecycles.

Supply support for 70V27S15PF 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

Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, and RF solutions for high-performance computing and communications infrastructure.

The IDT70V27 family was designed specifically for deterministic inter-processor communication in real-time embedded systems-emphasizing hardware arbitration, low-latency access, and seamless bus-width scalability without external logic.

FAQ

What is the maximum operating frequency supported by the 70V27S15PF?

The 70V27S15PF does not operate on a clock signal-it is fully asynchronous. Its performance is defined by timing parameters: 15 ns maximum read cycle time (tRC) and 15 ns maximum address access time (tAA). This enables reliable operation with microcontrollers or FPGAs running up to ~67 MHz in tightly timed control loops, provided setup/hold times are met per AC specifications.

Does the 70V27S15PF support both Master and Slave configurations on the same PCB?

Yes-the 70V27S15PF supports dynamic Master/Slave role assignment via the M/S pin. When M/S = VIH, BUSYL/BUSYR become push-pull outputs for arbitration; when M/S = VIL, they become inputs that inhibit writes during contention. Multiple 70V27S15PF devices can be cascaded on one board-one configured as Master, others as Slaves-to build 32-bit or wider memory systems without external logic.

How does semaphore functionality work on the 70V27S15PF?

The 70V27S15PF provides eight hardware semaphore flags accessed via A0–A2 and controlled by SEM pins. Writing to I/O0 sets a flag; reading any I/Ox returns the flag state. Semaphores are shared between ports and require no software polling-enabling atomic resource locking in real-time OS environments. The 70V27S15PF guarantees flag update within 10 ns (tSOP) and resolves contention within 5 ns (tSPS).

Is the 70V27S15PF pin-compatible with other members of the IDT70V27 family?

Yes-all IDT70V27 variants (e.g., 70V27S20PF, 70V27L15PF) share identical 100-pin TQFP packaging and pinout. Differences lie in speed grade (15/20/25/35/55 ns) and power profile (S = standard active/standby, L = ultra-low standby). A 70V27S15PF can be substituted for a 70V27S20PF in the same footprint, though timing margins will improve at the expense of higher standby current.

What are the voltage tolerance limits for the 70V27S15PF's I/O pins?

The 70V27S15PF's I/O pins are LVTTL-compatible with absolute maximum ratings of −0.5 V to +4.6 V (VTERM). Under normal operation, inputs accept VIH ≥ 2.0 V and VIL ≤ 0.8 V at VDD = 3.3 V ±0.3 V. Outputs drive VOH ≥ 2.4 V (at −4 mA) and VOL ≤ 0.4 V (at +4 mA). Input leakage remains ≤10 µA across the full industrial temperature range.