Renesas 70V9289L9PFI8

Overview

70V9289L9PFI8 from IDT (Integrated Device Technology) is a high-speed, 3.3V, 64K × 18-bit synchronous dual-port pipelined SRAM with true dual-ported memory cells enabling simultaneous read/write access to the same address on left and right ports. It supports industrial temperature range (–40°C to +85°C), 12 ns pipelined cycle time (83 MHz operation), and flow-through/pipelined output mode selection via FT/PIPE pins. Used in real-time DSP co-processing, network packet buffering, and FPGA-based protocol bridging where deterministic latency and port independence are critical.

For engineers reviewing the 70V9289L9PFI8 datasheet, 70V9289L9PFI8 pinout, 70V9289L9PFI8 application, or 70V9289L9PFI8 equivalent, key selection criteria include pipelined vs. flow-through timing modes, dual chip enable depth expansion capability, separate upper/lower byte controls for bus matching, and industrial-grade 3.3V LVTTL compatibility with 4 ns address setup time.

Technical Context

The 70V9289L9PFI8 implements fully synchronous operation on both ports with clocked address, data, and control registers-requiring only 4 ns setup and 0 ns hold time relative to CLK. Its self-timed write architecture decouples internal write pulse generation from clock edge timing, enabling fast cycle times independent of clock duty cycle.

It features dual independent address counters per port (enabled via CNTEN/ADSL/CNTRST), allowing burst-mode sequential access without external address increment logic. The device supports depth expansion using CE0/CE1 pairing across multiple units without additional decoding logic, and provides asynchronous OE for flexible bus interfacing while maintaining synchronous core operation.

Key Specifications

Pinout & Package

70V9289L9PFI8 is housed in a 128-pin Thin Quad Flatpack (TQFP) package measuring 14 mm × 20 mm × 1.4 mm, with exposed thermal pad (not electrically connected). All VDD pins require local 3.3V decoupling; all VSS pins must be solidly grounded.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-12BGXI and AS7C3316200B-12TIN, the 70V9289L9PFI8 uniquely integrates dual address counters and dual chip enables-reducing external logic count and PCB area while maintaining industrial temperature operation and 12 ns performance in a 128-pin TQFP.

Availability

70V9289L9PFI8 is available at Aetrix Electronics and suitable for telecom packet buffering, DSP co-processor interfacing, FPGA-based protocol bridging, and industrial motion control applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature qualification.

Supply support for 70V9289L9PFI8 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 70V9289L9PFI8 belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for real-time systems requiring deterministic, low-latency, concurrent memory access across independent clock domains.

FAQ

What is the maximum operating frequency of the 70V9289L9PFI8 in pipelined mode?

The 70V9289L9PFI8 achieves a 12 ns clock cycle time in pipelined output mode, supporting a maximum operating frequency of 83 MHz. This specification is guaranteed over the full industrial temperature range (–40°C to +85°C) and 3.3 V ± 0.3 V supply voltage, with all synchronous inputs meeting 4 ns setup and 0 ns hold timing requirements relative to CLK.

Does the 70V9289L9PFI8 support independent address counters on both ports?

Yes, the 70V9289L9PFI8 includes dedicated address counter logic on both left and right ports, controlled by CNTENL/CNTRSTL/ADSL and CNTENR/CNTRSTR/ADSR signals. Each counter operates independently, enabling burst-mode sequential access without external increment logic-critical for DSP and packet processing applications.

Can the 70V9289L9PFI8 be used for depth expansion without external logic?

Yes, the 70V9289L9PFI8 supports seamless depth expansion using its dual chip enables (CE0/CE1 per port). By tying CE0 of one device to CE1 of another and controlling them with a single higher-order address bit (e.g., A16), multiple 70V9289L9PFI8 units can be stacked without additional decoding gates or CPLDs.

What is the standby power consumption of the 70V9289L9PFI8?

The 70V9289L9PFI8 draws only 0.4 mA typical (1.3 mW at 3.3 V) in full standby mode (ISB3), achieved when both ports are disabled via CMOS-level chip enables (CE > VDD – 0.2 V). This ultra-low standby current supports energy-efficient operation in battery-backed or intermittently active industrial systems.

Is the 70V9289L9PFI8 pin-compatible with other members of the IDT70V9x89 family?

No-the 70V9289L9PFI8 uses a 128-pin TQFP package with specific pin assignments for dual address counters and byte controls. While functionally related to IDT70V9389L variants, it is not pin-compatible due to differences in I/O mapping (e.g., I/O0–I/O15 vs. I/O0–I/O17) and counter signal placement. Always verify pinout against PK128 package drawing 4856 drw 02b before board design.