Renesas 70V7339S166BC8

Overview

70V7339S166BC8 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 at industrial temperature (−40°C to +85°C), 3.6 ns max clock-to-data-out in pipelined mode, and selectable 3.3 V or 2.5 V I/O interface per port. It serves as shared memory in real-time DSP systems requiring concurrent read/write access across two processing domains.

For engineers reviewing the 70V7339S166BC8 datasheet, 70V7339S166BC8 pinout, 70V7339S166BC8 application, or 70V7339S166BC8 equivalent, key selection criteria include bank-switchable arbitration for non-blocking multi-port access, JTAG IEEE 1149.1 compliance for boundary scan, dual chip enables for seamless depth expansion, and independent OPT-pin-controlled I/O voltage selection per port.

Technical Context

The 70V7339S166BC8 implements a true SRAM core-not traditional dual-port RAM-enabling deterministic bank-switched access across 64 independent 8K × 18 banks. Each port uses separate address decode, bank decode, and I/O control logic, allowing simultaneous access to different banks without contention.

Its timing architecture supports both pipelined (3.6 ns tCD2 @ 166 MHz) and flow-through (12 ns tCD1) output modes, with fully synchronous operation on both ports, 1.5 ns address setup, and self-timed write enabling minimal cycle time. The counter enable (CNTEN) and repeat (REPEAT) features support burst address generation without external logic.

Key Specifications

Pinout & Package

70V7339S166BC8 is housed in a 256-pin Ball Grid Array (BC256) package with 1.0 mm ball pitch, 17 mm × 17 mm body size, and thermal pad-compatible layout. Pin functions are symmetrically distributed across left (L) and right (R) ports, with dedicated VDD, VDDQ, and VSS balls for power integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-166AXC and AS7C35128P-166BIN, the 70V7339S166BC8 uniquely delivers per-port I/O voltage selection, bank-switch arbitration, and integrated JTAG - making it optimal for complex, mixed-voltage, test-critical embedded systems.

Availability

70V7339S166BC8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, medical imaging, and defense electronics requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 70V7339S166BC8 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 solutions for communications, computing, and industrial markets.

The 70V7339S166BC8 belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered for deterministic, low-latency shared memory in real-time signal processing and packet-forwarding systems.

FAQ

What is the maximum operating temperature range supported by the 70V7339S166BC8?

The 70V7339S166BC8 is rated for industrial temperature operation from −40°C to +85°C. This specification is validated for the 166 MHz speed grade and applies to the BC256 package variant. The BF208 fpBGA package does not support 166 MHz at industrial temperatures per datasheet note on page 8.

How does bank switching prevent port contention in the 70V7339S166BC8?

The 70V7339S166BC8 uses BA0L–BA5L and BA0R–BA5R to select one of 64 independent banks. If both ports attempt access to the same bank simultaneously, neither operation is valid and data corruption may occur. The device provides no internal arbitration - contention avoidance must be managed by system-level bank address coordination.

Can the left and right ports of the 70V7339S166BC8 operate at different I/O voltages?

Yes. The 70V7339S166BC8 supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL = VIH configures VDDQL for 3.3 V operation; setting OPTL = VIL configures it for 2.5 V. The same applies to OPTR/VDDQR. Core supply VDD remains fixed at 3.3 V.

What is the significance of the PL/FTL and PL/FTR pins on the 70V7339S166BC8?

PL/FTL and PL/FTR are DC-level control inputs that configure each port's output timing mode: VIH selects pipelined mode (3.6 ns tCD2 @ 166 MHz), while VIL selects flow-through mode (12 ns tCD1). These pins must remain stable during operation and are not sampled dynamically - they define static output latency behavior.

Does the 70V7339S166BC8 support JTAG boundary scan, and what pins are required?

Yes, the 70V7339S166BC8 complies with IEEE 1149.1 JTAG. Required pins are TCK (Test Clock), TMS (Test Mode Select), TDI (Test Data In), TDO (Test Data Out), and TRST (Test Reset). All five are assigned to dedicated balls in the BC256 package and require proper termination per JTAG specification.