Renesas 70V7339S166BC

Overview

70V7339S166BC from Integrated Device Technology is a high-speed 512K × 18 (9 Mbit) synchronous bank-switchable dual-ported SRAM with independent left/right ports, 166 MHz operation (3.6 ns access), industrial temperature support (–40°C to +85°C), and selectable 3.3 V or 2.5 V I/O interfaces per port. It enables concurrent read/write access to separate 8K × 18 memory banks in telecom switching fabric and real-time packet buffering.

For engineers reviewing the 70V7339S166BC datasheet, 70V7339S166BC pinout, 70V7339S166BC application, or 70V7339S166BC equivalent, key selection criteria include bank-switchable arbitration, pipelined/flow-through output mode selection, JTAG IEEE 1149.1 compliance, dual chip enable depth expansion, and independent VDDQ voltage control per port.

Technical Context

The 70V7339S166BC implements a true SRAM core-not traditional dual-port-enabling bank-switchable access across 64 independent 8K × 18 blocks. Bank selection is controlled directly via six dedicated BA0–BA5 pins per port, with collision detection when both ports target identical banks.

It supports fully synchronous operation on both ports: 5 ns cycle time at 200 MHz (14 Gbps aggregate bandwidth), 3.4 ns clock-to-data-out in pipelined mode, and 1.5 ns setup / 0.5 ns hold timing for all inputs at 200 MHz. The automatic power-down feature uses CE0/CE1 to place each port into low-standby current mode independently.

Key Specifications

Pinout & Package

70V7339S166BC is housed in a 256-pin Ball Grid Array (BC256) package with 1.0 mm ball pitch and 17 mm × 17 mm footprint. Power delivery includes dedicated VDD (3.3 V core), VDDQL/VDDQR (port-selectable I/O supply), and multiple VSS balls for low-noise grounding.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-166BAXI and AS7C3256A-166BIN, the 70V7339S166BC uniquely delivers bank-switchable concurrency, per-port voltage flexibility, and integrated JTAG - making it the sole option for industrial telecom and medical imaging systems demanding scalable, testable, and thermally robust dual-port memory.

Availability

70V7339S166BC is available at Aetrix Electronics and suitable for telecom switching fabric, real-time packet buffering, industrial motion control, and medical imaging data pipeline applications requiring stable component supply across extended product lifecycles.

Supply support for 70V7339S166BC 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 sensor signal conditioning ICs for communications and computing infrastructure.

The 70V7339S product line was designed specifically for high-bandwidth, low-latency dual-ported memory applications in telecom, networking, and industrial automation - emphasizing bank-switchable arbitration, mixed-voltage I/O, and JTAG testability.

FAQ

What is the maximum operating frequency of the 70V7339S166BC, and under what conditions is it guaranteed?

The 70V7339S166BC is rated for 166 MHz operation with guaranteed 3.6 ns maximum access time. This performance is validated over the full industrial temperature range (–40°C to +85°C) and requires VDD = 3.3 V ±150 mV and VDDQ = 3.3 V (i.e., OPTL/OPTR = VIH). At 2.5 V I/O, timing remains compliant but is not speed-binned to 166 MHz.

Does the 70V7339S166BC support true simultaneous read/write between ports, and how is bank contention resolved?

Yes - the 70V7339S166BC supports true concurrent access when left and right ports target different banks (BA0L–BA5L ≠ BA0R–BA5R). If both ports attempt access to the same bank, neither operation completes successfully and data corruption may occur. The device does not arbitrate; resolution must be implemented externally via bank address coordination.

Can the left and right ports of the 70V7339S166BC operate at different I/O voltages, and how is this configured?

Yes - the 70V7339S166BC supports independent I/O voltage selection per port. Setting OPTL = VIH configures the left port for 3.3 V I/O (with VDDQL = 3.3 V), while OPTR = VIL configures the right port for 2.5 V I/O (with VDDQR = 2.5 V). Both ports may use the same or different voltages simultaneously.

What is the purpose of the REPEAT pin on the 70V7339S166BC, and how does it interact with the address counter?

The REPEAT pin resets the internal address counter to the last valid address loaded via ADS. When asserted (REPEAT = VIL), it causes the counter to reuse that address on the next CLK edge - enabling burst reads/writes from a fixed location without reloading the address bus. It does not affect bank address bits unless explicitly included in the ADS-latched value.

Is the 70V7339S166BC pin-compatible with other speed grades in the 70V7339S family, such as the 70V7339S200 or 70V7339S133?

Yes - all 70V7339S variants (including 70V7339S166BC, 70V7339S200, and 70V7339S133) share identical 256-pin BC256 packaging and pinout. Speed grade differentiation is purely electrical and thermal; no PCB layout change is needed when upgrading/downgrading within the same package variant.