Renesas 70V7599S166BF

Overview

70V7599S166BF from IDT (now Renesas) is a high-speed, 128K × 36 (4 Mbit), synchronous bank-switchable dual-ported SRAM with independent left/right ports, 166 MHz operation (3.6 ns clock-to-data), pipelined or flow-through output mode, and selectable 2.5V/3.3V I/O interface per port - used in high-bandwidth packet buffering and real-time telecom switching systems.

For engineers reviewing the 70V7599S166BF datasheet, 70V7599S166BF pinout, 70V7599S166BF application, or 70V7599S166BF equivalent, key selection criteria include bank-switchable access arbitration, dual chip enables for depth expansion, JTAG IEEE 1149.1 compliance, and industrial temperature support up to +85°C in the BF208 fpBGA package.

Technical Context

This device implements a true synchronous SRAM core-not legacy dual-port-enabling full clock-synchronous operation on both ports with 5 ns cycle time at 200 MHz and self-timed write for minimal latency. It features 64 independent 2K × 36 banks, each accessible via dedicated BA0–BA5 address lines per port.

Bank conflict detection is user-managed: simultaneous left/right access to the same bank invalidates both reads/writes, requiring external arbitration logic. The counter-enable and repeat functions support burst-addressed streaming without external address generation, while separate byte enables (BE0–BE3) enable 9-bit byte granularity per port.

Key Specifications

Pinout & Package

70V7599S166BF is housed in a 208-pin fine-pitch Ball Grid Array (BF208) package with 0.8 mm ball pitch, 15 mm × 15 mm body, and thermal pad-compatible layout. Power and ground balls are distributed across all four quadrants for low-noise operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362KV18 and 70V9269L15PF8, the 70V7599S166BF uniquely delivers 166 MHz performance in the compact BF208 package with bank-switchable arbitration - making it the sole option for space-constrained, high-throughput telecom and radar systems requiring deterministic concurrent access.

Availability

70V7599S166BF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and medical imaging systems requiring stable component supply, long-term lifecycle assurance, and industrial temperature support.

Supply support for 70V7599S166BF 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

IDT (Integrated Device Technology), now part of Renesas Electronics, is a leader in high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 70V7599S family was designed specifically for ultra-low-latency, high-bandwidth dual-access memory applications in telecom switches, radar processors, and real-time control systems - emphasizing bank-level concurrency and flexible I/O voltage scaling.

FAQ

What is the maximum operating frequency of the 70V7599S166BF?

The 70V7599S166BF is rated for 166 MHz operation (3.6 ns clock-to-data valid in pipelined mode) over the industrial temperature range (–40°C to +85°C). This speed grade requires VDDQ = 3.3V per port (OPTL/OPTR = VIH) and is supported only in the BF208 package - not available in 256-pin BGA at this speed.

Does the 70V7599S166BF support mixed-voltage operation between its two ports?

Yes, the 70V7599S166BF supports independent I/O voltage selection per port: OPTL sets left-port VDDQL (2.5V or 3.3V), and OPTR sets right-port VDDQR (2.5V or 3.3V). This allows one port to interface with a 2.5V FPGA bank while the other connects to a 3.3V microcontroller - no external level shifters required.

How does bank conflict handling work in the 70V7599S166BF?

The 70V7599S166BF does not resolve bank conflicts internally. If BA0L–BA5L equals BA0R–BA5R while both ports attempt access simultaneously, neither access is guaranteed - writes may corrupt data and reads return invalid values. System-level arbitration logic must ensure bank address uniqueness before asserting CE0/CE1 on both ports.

What is the purpose of the CNTEN and REPEAT signals in the 70V7599S166BF?

CNTEN enables automatic address increment on each clock cycle, allowing burst-mode sequential access without external address counters. REPEAT resets the internal counter to the last valid address loaded via ADS - enabling rapid re-read of a block (e.g., header data) without reloading the address bus. Both operate independently per port.

Is JTAG boundary-scan supported on the 70V7599S166BF?

Yes, the 70V7599S166BF fully complies with IEEE 1149.1 and includes dedicated TDI, TDO, TCK, TMS, and TRST pins. The JTAG interface supports boundary-scan testing of interconnects and internal register visibility - critical for validation in dense telecom line cards where physical probe access is limited.