Renesas 70V7599S166BF8

Overview

70V7599S166BF8 from Integrated Device Technology is a high-speed 128K × 36 synchronous bank-switchable dual-ported SRAM with 4 Mbit capacity, organized into 64 independent 2K × 36 banks. It supports 166 MHz operation (6 ns cycle time), features dual 3.3V/2.5V I/O voltage selectability per port via OPT pins, and delivers 3.6 ns clock-to-data-out in pipelined mode - used in high-bandwidth packet buffering and telecom line-card memory subsystems.

For engineers reviewing the 70V7599S166BF8 datasheet, 70V7599S166BF8 pinout, 70V7599S166BF8 application, or 70V7599S166BF8 equivalent, this page provides verified timing parameters, bank-switching control logic, JTAG-compliant test interface details, and industrial-grade power-down behavior for deterministic multi-port memory arbitration.

Technical Context

The 70V7599S166BF8 implements a true synchronous dual-port architecture with independent left/right clock domains, each supporting pipelined or flow-through output modes controlled by PL/FTL and PL/FTR pins. Bank access is explicitly managed via six dedicated bank address pins (BA0–BA5) per port, enabling non-conflicting concurrent access to separate 2K × 36 memory blocks.

It integrates on-chip address counters with CNTEN/REPEAT control, self-timed write cycles, and dual chip enables (CE0/CE1) for seamless depth expansion. The device complies with IEEE 1149.1 JTAG boundary-scan and supports asynchronous output enable (OE) while maintaining strict 1.5 ns address setup and 0.5 ns hold timing at 166 MHz.

Key Specifications

Pinout & Package

70V7599S166BF8 is packaged in a 208-pin fine-pitch Ball Grid Array (fpBGA) with 0.8 mm ball pitch and 15 mm × 15 mm body size. All VDD pins require 3.3V supply; VDDQ pins must match OPT pin logic level (3.3V if OPT = VIH, 2.5V if OPT = VIL).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 70V7599S166BF8, the BC256 variant offers superior thermal performance and routing headroom at the cost of larger footprint, while the 133 MHz BF208 variant trades speed for lower power and simpler timing closure - all share identical bank-switching logic, JTAG interface, and OPT-selectable I/O voltage.

Availability

70V7599S166BF8 is available at Aetrix Electronics and suitable for telecom line cards, network packet buffers, radar signal processors, and industrial PLC data loggers requiring stable component supply across extended product lifecycles.

Supply support for 70V7599S166BF8 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, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 70V7599S series targets high-bandwidth deterministic memory applications requiring concurrent dual-port access, bank-level arbitration, and mixed-voltage interoperability - optimized for telecom infrastructure and real-time embedded systems.

FAQ

What is the maximum operating frequency of the 70V7599S166BF8?

The 70V7599S166BF8 is rated for 166 MHz operation, corresponding to a 6 ns clock cycle time (tCYC2) in pipelined mode. This speed grade is validated across the industrial temperature range (−40°C to +85°C) and requires VDDQ = 3.3V (i.e., OPTL/OPTR = VIH) per port. Performance is not guaranteed at 166 MHz if either port operates at 2.5V I/O levels.

Does the 70V7599S166BF8 support independent I/O voltage selection per port?

Yes, the 70V7599S166BF8 supports independent I/O voltage selection via OPTL and OPTR pins. Setting OPTL = VIH configures the left port for 3.3V I/O operation (requiring VDDQL = 3.3V), while OPTL = VIL selects 2.5V (requiring VDDQL = 2.5V). The same applies to the right port with OPTR and VDDQR. Core voltage (VDD) remains fixed at 3.3V.

How does bank switching work in the 70V7599S166BF8?

Bank switching in the 70V7599S166BF8 is controlled directly by six bank address pins per port (BA0L–BA5L and BA0R–BA5R), selecting one of 64 independent 2K × 36 memory banks. Concurrent access to different banks is permitted; simultaneous access to the same bank by both ports invalidates both transactions and may corrupt data. Users must ensure BA values differ to maintain coherency.

What is the purpose of the CNTEN and REPEAT signals in the 70V7599S166BF8?

CNTEN enables automatic address increment on each clock cycle, while REPEAT resets the internal address counter to the last valid address loaded via ADS. When CNTEN = VIL and REPEAT = VIH, the counter advances; when REPEAT = VIL, it reloads the ADS-latched address. This enables efficient burst reads/writes without CPU intervention - critical for streaming applications like radar sampling.

Is the 70V7599S166BF8 compatible with IEEE 1149.1 JTAG testing?

Yes, the 70V7599S166BF8 fully implements IEEE 1149.1 JTAG boundary-scan with dedicated TDI, TDO, TCK, TMS, and TRST pins. The on-chip TAP controller supports instruction register loading, data register scan, and boundary-scan testing - enabling in-system verification, fault isolation, and production test coverage without physical probe access.