Renesas 70V27L55PF8

Overview

70V27L55PF8 from Integrated Device Technology (IDT) is a high-speed, low-power 32K × 16 dual-port static RAM with true simultaneous access capability, 55 ns maximum read/write cycle time, 3.3 V ±0.3 V single-supply operation, and industrial temperature range (–40°C to +85°C). It enables real-time inter-processor communication in embedded control systems requiring deterministic memory arbitration.

For engineers reviewing the 70V27L55PF8 datasheet, 70V27L55PF8 pinout, 70V27L55PF8 application, or 70V27L55PF8 equivalent, key selection criteria include BUSY/INT flag timing, semaphore support for multi-core synchronization, LVTTL-compatible I/O, 100-pin TQFP package compatibility, and standby current of 660 µW (typ.) in full CMOS-disable mode.

Technical Context

The 70V27L55PF8 implements fully asynchronous dual-port architecture with independent left/right address, control, and 16-bit bidirectional I/O buses. Its on-chip arbitration logic resolves port contention via address-match or chip-enable priority, generating push-pull BUSY flags with tBAA ≤ 55 ns and tBDD ≤ 50 ns.

It supports MASTER/SLAVE cascading for 32-bit+ data width expansion using M/S pin configuration, and integrates full hardware semaphore signaling across eight flags addressed by A0–A2 - enabling lock-free resource sharing between heterogeneous processors without external logic.

Key Specifications

Pinout & Package

70V27L55PF8 is housed in a 100-pin TQFP (PN100-1) with 0.5 mm pitch, 14 mm × 14 mm footprint, and 1.4 mm height. 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-55AXC and AS7C33256P-55JCIN, the 70V27L55PF8 delivers integrated arbitration, semaphore, and interrupt functionality in a single chip - reducing BOM count, PCB area, and firmware development effort for safety-critical real-time systems.

Availability

70V27L55PF8 is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS modules, medical imaging buffers, and avionics control units requiring stable component supply across extended product lifecycles.

Supply support for 70V27L55PF8 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, RF, and power management ICs for communications, computing, and industrial markets.

The IDT70V27 family was designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems - emphasizing hardware-accelerated arbitration, semaphore support, and ultra-low-power standby operation.

FAQ

What is the maximum operating speed of the 70V27L55PF8?

The 70V27L55PF8 has a maximum read/write cycle time of 55 ns, corresponding to a theoretical maximum frequency of ~18.2 MHz for continuous random access. This timing applies across the full industrial temperature range (–40°C to +85°C) and 3.3 V ±0.3 V supply, with tAA, tACE, and tABE all guaranteed ≤55 ns.

Does the 70V27L55PF8 support hardware semaphore functionality?

Yes, the 70V27L55PF8 includes full on-chip hardware semaphore logic supporting eight independent flags. These are accessed via A0–A2 address lines and controlled by SEM pins; writes to I/O0 set the flag, and reads return the value across all 16 I/O bits - enabling atomic resource locking without CPU intervention.

How does the BUSY arbitration mechanism work on the 70V27L55PF8?

The 70V27L55PF8 implements dual-mode BUSY arbitration: address-match mode asserts BUSY when both ports access the same location, and CE-timing mode prioritizes the port whose CE goes active first. In MASTER mode (M/S = VIH), BUSY is an output; in SLAVE mode (M/S = VIL), it is an input that inhibits writes when asserted.

What is the standby power consumption of the 70V27L55PF8?

The 70V27L55PF8 achieves 660 µW typical standby power (ISB3) when both ports are fully disabled using CMOS-level inputs (CE > VDD – 0.2 V). This ultra-low quiescent current is enabled by its low-power CMOS process and makes it suitable for battery-backed or energy-harvesting applications.

Can the 70V27L55PF8 be used in MASTER/SLAVE configurations for wider data buses?

Yes, the 70V27L55PF8 supports cascaded MASTER/SLAVE operation using the M/S pin. When configured as MASTER (M/S = VIH), BUSY is an output flag; as SLAVE (M/S = VIL), BUSY is an input that blocks writes. This allows seamless expansion to 32-bit or wider data paths without external glue logic.