Renesas 7134LA25JI8

Overview

IDT7134LA25JI8 from Renesas Electronics is a high-speed 4K × 8 dual-port static RAM with independent left/right asynchronous ports, 25 ns maximum access time (industrial grade), 1 μA typical standby current, and battery-backed data retention down to 2 V - deployed in real-time interprocessor communication, video frame buffering, and military avionics systems requiring concurrent read/write access without arbitration logic.

For engineers reviewing the 7134LA25JI8 datasheet, 7134LA25JI8 pinout, 7134LA25JI8 application, or 7134LA25JI8 equivalent, this page delivers verified package mapping (52-pin PLCC), confirmed dual-port timing parameters (tRC = 25 ns, tAOE = 15 ns), industrial temperature support (–40°C to +85°C), and validated low-power operation (ISB3 = 0.2 mA) - all extracted from Renesas' official 7134SA/LA datasheet revision May 2021.

Technical Context

The 7134LA25JI8 implements fully asynchronous dual-port architecture with separate address, control, and bidirectional I/O buses per port - enabling simultaneous, independent memory access without on-chip arbitration. Each port features dedicated CE, OE, R/W, and address lines, with no internal bus contention resolution logic.

Its CMOS-based design supports TTL-compatible signaling at 5 V ±10%, includes automatic power-down via chip enable (CE), and delivers true data retention at V_CC = 2 V (LA-only feature). The device operates across –40°C to +85°C and meets MIL-PRF-38535 QML for select military variants - though 7134LA25JI8 itself is industrial-grade PLCC packaging.

Key Specifications

Pinout & Package

7134LA25JI8 is housed in a 52-pin Plastic Leaded Chip Carrier (PLCC, package code PLG52), body size ≈ 0.75 in × 0.75 in × 0.17 in, with J-lead configuration and pin 1 index marker. All V_CC and GND pins must be externally decoupled per datasheet note.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 7134LA25JI8, CY7C024AV-25AXC offers wider data bus but mandates 3.3 V infrastructure, while AS7C34098B-25JCIN adds JTAG debug capability at the cost of voltage compatibility - neither provides the 2 V data retention or 5 V TTL interoperability essential for retrofitting industrial or avionics platforms.

Availability

7134LA25JI8 is available at Aetrix Electronics and suitable for industrial motion control, avionics data logging, interprocessor communication, and video buffering applications requiring stable component supply across extended product lifecycles.

Supply support for 7134LA25JI8 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

Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The IDT7134 family was originally developed by Integrated Device Technology (acquired by Renesas in 2019) to address deterministic, low-latency memory sharing in real-time embedded systems - particularly where external arbitration is impractical or undesirable.

FAQ

What is the operating temperature range for the 7134LA25JI8?

The 7134LA25JI8 is rated for industrial temperature operation from –40°C to +85°C, as confirmed in Renesas' official ordering information table (page 12) and DC operating conditions section (Table 03). This range is validated for continuous operation under full electrical load and applies specifically to the "I" suffix in the part number, which denotes industrial grade.

Does the 7134LA25JI8 support true data retention at 2 V?

Yes - the "LA" designation explicitly indicates low-power battery backup capability. Per Table 07 (Data Retention Characteristics), the 7134LA25JI8 maintains valid data at V_CC = 2.0 V minimum across all temperature ranges, with ICCDR ≤ 4000 µA (military) or ≤ 1500 µA (commercial), confirming functional retention without active refresh.

Which package type does the 7134LA25JI8 use?

The 7134LA25JI8 uses a 52-pin Plastic Leaded Chip Carrier (PLCC), designated PLG52 in Renesas' ordering information (page 12). Pin configuration matches the top-view diagram in Figure 03 ("52-Pin PLCC Top View"), with index corner and J-lead geometry compliant with JEDEC MO-047AB.

Can both ports of the 7134LA25JI8 perform simultaneous read/write operations?

Yes - the 7134LA25JI8 supports fully independent, asynchronous access: one port may read while the other writes to the same or different addresses. However, simultaneous access to the exact same memory location requires external arbitration to ensure data integrity, as stated in the Functional Description (page 2): "It is the user's responsibility to ensure data integrity when simultaneously accessing the same memory location from both ports."

What is the maximum power consumption of the 7134LA25JI8 during active operation?

Per Table 06a (DC Electrical Characteristics), the 7134LA25JI8 exhibits a typical dynamic operating current (ICC) of 160 mA and a maximum of 280 mA under both ports active at fMAX, V_CC = 5.0 V, and TA = +25°C. At industrial temperature extremes (–40°C/+85°C), max ICC rises to 310 mA - consistent with its 25 ns speed grade and LA power optimization.