Renesas 70V7599S166BC8

Overview

70V7599S166BC8 from Integrated Device Technology 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), selectable pipelined or flow-through output mode, and dual 3.3 V / 2.5 V I/O interface support per port. It is used in high-bandwidth packet buffering and real-time data co-processing applications requiring concurrent read/write access to shared memory banks.

For engineers reviewing the 70V7599S166BC8 datasheet, 70V7599S166BC8 pinout, 70V7599S166BC8 application, or 70V7599S166BC8 equivalent, key selection criteria include bank-switchable arbitration control, JTAG-compliant IEEE 1149.1 testability, 256-pin BGA package compatibility, industrial temperature range (–40°C to +85°C), and dual-voltage I/O flexibility with OPT pin configuration.

Technical Context

This device implements a true synchronous SRAM core-not a traditional dual-port architecture-enabling full clock-synchronized operation on both ports with 5 ns cycle time at 200 MHz and self-timed write for minimal latency. Each port has dedicated address, control, and 36-bit I/O buses, with bank access governed by six independent BA[0:5] pins per port.

It supports depth expansion via dual chip enables (CE0/CE1), automatic power-down via CE assertion, and burst-mode address generation using CNTEN/REPEAT logic with wraparound across 64 × 2K banks. The JTAG TAP controller provides boundary-scan testing capability compliant with IEEE 1149.1.

Key Specifications

Pinout & Package

70V7599S166BC8 is packaged in a 256-pin BGA (package code BC256), with 17 mm × 17 mm footprint, 1.0 mm ball pitch, and 1.4 mm height. Power and ground balls are distributed across the array for low-noise operation; VDD (3.3 V core) and VDDQ (3.3 V or 2.5 V I/O) are separately routed per port.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362KV18-166BZI and AS7C3256B-166JCIN, the 70V7599S166BC8 uniquely delivers bank-switchable arbitration, per-port voltage configurability, and integrated JTAG - making it the only option supporting scalable, mixed-voltage, high-bandwidth synchronous buffering in new industrial and telecom designs.

Availability

70V7599S166BC8 is available at Aetrix Electronics and suitable for packet buffering in network switches, real-time signal processing co-processor memory, and industrial PLC data exchange requiring stable component supply across extended product lifecycles.

Supply support for 70V7599S166BC8 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, specializes in high-performance timing, memory interface, and RF solutions for communications, computing, and industrial markets.

The 70V7599S product line was designed for high-bandwidth, low-latency shared-memory applications in telecom infrastructure, test equipment, and real-time embedded systems requiring deterministic dual-port access and flexible voltage interfacing.

FAQ

What is the maximum operating frequency of the 70V7599S166BC8, and under what conditions is it guaranteed?

The 70V7599S166BC8 is rated for 166 MHz operation across the industrial temperature range (–40°C to +85°C), with guaranteed 3.6 ns clock-to-data valid (tCD2) timing in pipelined mode. This performance requires VDDQ = 3.3 V (i.e., OPTL/OPTR = VIH) and is validated only in the BC256 256-pin BGA package - the BF208 fpBGA variant does not support 166 MHz at industrial temperatures.

How does bank-switching work in the 70V7599S166BC8, and what happens if both ports access the same bank simultaneously?

The 70V7599S166BC8 uses BA0L–BA5L and BA0R–BA5R to independently select one of 64 banks per port. If both ports assert identical bank addresses concurrently, neither access is valid: writes may corrupt data, and reads return invalid output. The device does not arbitrate - users must implement external logic or software coordination to avoid BA[0:5] collisions.

Can the left and right ports of the 70V7599S166BC8 operate at different I/O voltages, and how is this configured?

Yes - the 70V7599S166BC8 supports independent I/O voltage selection per port. OPTL set to VIH (3.3 V) configures the left port for 3.3 V signaling with VDDQL = 3.3 V; OPTR set to VIL (0 V) configures the right port for 2.5 V signaling with VDDQR = 2.5 V. Both configurations are electrically isolated and validated per datasheet Table 5a/5b.

Does the 70V7599S166BC8 support JTAG boundary-scan, and which pins are required?

Yes, the 70V7599S166BC8 fully complies with IEEE 1149.1 JTAG. Required pins are TDI (pin R1), TDO (pin A4), TCK (pin T2), TMS (pin P3), and TRST (pin R3). These signals are dedicated and do not share functionality with memory control pins, enabling reliable system-level test and debug without compromising memory operation.

What is the purpose of the CNTEN and REPEAT pins, and how do they improve burst-mode performance?

CNTEN enables automatic address increment on each clock cycle; REPEAT resets the internal counter to the last ADS-loaded address. Together, they eliminate external address generation logic for sequential accesses - e.g., streaming packet headers or FFT bins - reducing FPGA resource usage and improving timing closure in high-speed designs using the 70V7599S166BC8.