Renesas 70V7339S133BCI

Overview

70V7339S133BCI from Integrated Device Technology is a high-speed 512K × 18 (9 Mbit) synchronous bank-switchable dual-ported SRAM with independent left/right ports, 133 MHz operation (4.2 ns max access), industrial temperature range (–40°C to +85°C), and selectable 3.3 V or 2.5 V I/O interface 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 70V7339S133BCI datasheet, 70V7339S133BCI pinout, 70V7339S133BCI application, or 70V7339S133BCI 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 70V7339S133BCI 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 BA0–BA5 pins on each port, with collision detection when both ports target identical banks.

It supports full synchronous operation on both ports: 5 ns cycle time at 200 MHz (not applicable to this speed grade), but for 70V7339S133BCI specifically, it guarantees 25 ns flow-through clock cycle (tCYC1) and 7.5 ns pipelined clock cycle (tCYC2), with 4.2 ns max clock-to-data (tCD2) in pipelined mode and 15 ns in flow-through mode.

Key Specifications

Pinout & Package

70V7339S133BCI 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. Power delivery includes dedicated VDD (3.3 V core), VDDQL/VDDQR (port-selectable 3.3 V/2.5 V I/O), and multiple VSS balls for low-noise grounding.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133BZI and AS7C35128PFS-133BIN, the 70V7339S133BCI uniquely delivers bank-switchable arbitration, per-port voltage selection, and integrated JTAG - reducing system-level complexity in high-reliability telecom and medical designs.

Availability

70V7339S133BCI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, medical imaging systems, and aerospace data acquisition requiring stable component supply across extended product lifecycles.

Supply support for 70V7339S133BCI 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 and computing markets.

The 70V7339S series was designed for high-bandwidth, low-latency memory subsystems in telecom switches, network processors, and real-time embedded systems demanding concurrent dual-port access and deterministic timing.

FAQ

What is the maximum guaranteed operating frequency for the 70V7339S133BCI?

The 70V7339S133BCI is rated for 133 MHz operation across the industrial temperature range (–40°C to +85°C). Its AC specifications guarantee 25 ns flow-through clock cycle time (tCYC1) and 7.5 ns pipelined clock cycle time (tCYC2), with 4.2 ns max clock-to-data (tCD2) in pipelined mode. This speed grade is only available in the 256-pin BC256 package.

Does the 70V7339S133BCI support independent I/O voltage levels on its two ports?

Yes, the 70V7339S133BCI supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL to VIH (3.3 V) configures VDDQL for 3.3 V operation, while setting it to VIL (0 V) configures VDDQL for 2.5 V. The same applies to OPTR and VDDQR. The core VDD remains fixed at 3.3 V ±150 mV.

How does bank-switching prevent data corruption in the 70V7339S133BCI?

The 70V7339S133BCI uses BA0–BA5 pins on each port to select one of 64 independent 8K × 18 banks. If both ports attempt to access the same bank simultaneously, neither access is valid and data may be corrupted during writes or invalid during reads. The architecture requires software/hardware coordination to ensure BA0L–BA5L ≠ BA0R–BA5R at all times - no internal arbitration logic is provided.

What JTAG capabilities does the 70V7339S133BCI provide?

The 70V7339S133BCI implements full IEEE 1149.1 JTAG boundary-scan functionality with TDI, TDO, TCK, TMS, and TRST pins. It supports device identification, interconnect testing, and visibility into internal control signals - enabling in-system validation of memory subsystem wiring and signal integrity without physical probe access.

Can the 70V7339S133BCI operate in both pipelined and flow-through output modes simultaneously?

Yes, the 70V7339S133BCI supports independent output mode configuration per port via PL/FTL (left) and PL/FTR (right) pins. One port can be set to pipelined mode (PL/FTx = VIH) for higher throughput, while the other operates in flow-through mode (PL/FTx = VIL) for minimal latency - enabling asymmetric system timing optimization.