Renesas 7130SA25J8

Overview

7130SA25J8 from IDT (Integrated Device Technology) is a high-speed 1K × 8 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, 25 ns maximum access time, TTL-compatible 5V ±10% supply, and industrial temperature range (–40°C to +85°C). It enables error-free 16-bit-or-wider memory expansion when paired with IDT7140 SLAVE devices in real-time communication systems.

For engineers reviewing the 7130SA25J8 datasheet, 7130SA25J8 pinout, 7130SA25J8 application, or 7130SA25J8 equivalent, key selection criteria include BUSY-flag arbitration timing (tBAA ≤ 25 ns), dual-port asynchronous read/write independence, open-drain BUSY output requiring external pull-up, and compatibility with 48-pin ceramic flatpack (J8) packaging for ruggedized embedded control.

Technical Context

The 7130SA25J8 implements fully asynchronous dual-port operation: left and right ports support independent address, control, and I/O lines with no shared timing constraints. Its on-chip arbitration logic resolves port contention via BUSY flag assertion-BUSYL and BUSYR are open-drain outputs requiring external pull-up resistors per datasheet Note 1.

As a MASTER device, it provides BUSY outputs and INTL/INTR flags for inter-port signaling, while SLAVE IDT7140 devices accept BUSY inputs to inhibit writes during contention. The device supports battery backup data retention only in LA variants-not applicable to this SA-grade part.

Key Specifications

Pinout & Package

7130SA25J8 is packaged in a 48-pin ceramic flatpack (FP48), body size ≈ 0.75 in × 0.75 in × 0.11 in, with pins arranged in dual in-line configuration and index mark at Pin 1 (top-left corner).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C131-25JC and IDT7142S25JG, the 7130SA25J8 uniquely delivers MASTER arbitration logic in a drop-in ceramic flatpack, reducing BOM count and eliminating timing-critical external logic-critical for certified avionics and military platforms.

Availability

7130SA25J8 is available at Aetrix Electronics and suitable for real-time digital signal processing, industrial programmable logic controllers, military communications baseband, and avionics data concentrators requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 7130SA25J8 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

IDT (Integrated Device Technology) is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions, now part of Renesas Electronics since 2019.

The IDT7130/7140 family was designed specifically for deterministic, contention-free dual-processor memory sharing in high-reliability embedded systems-emphasizing hardware arbitration, industrial/military temperature support, and legacy 5V system compatibility.

FAQ

What is the operating temperature range specified for the 7130SA25J8?

7130SA25J8 is rated for industrial temperature operation from –40°C to +85°C. This range is validated per the datasheet's Recommended Operating Temperature table and applies across all DC and AC electrical specifications, including 25 ns access time and standby current limits. It does not support commercial (0°C to +70°C) or military (–55°C to +125°C) grades-those are covered by other suffix variants like 7130SC or 7130SM.

Does the 7130SA25J8 support battery backup data retention?

No, the 7130SA25J8 does not support battery backup data retention. That feature is exclusive to LA-suffix variants (e.g., 7130LA25J8), which specify VDR = 2.0 V minimum and ICCDR ≤ 4000 µA under data retention mode. The SA suffix denotes standard active power profile only, with typical active current of 550 mW and standby current of 30 mA (ISB1).

How many GND and VCC pins does the 7130SA25J8 have, and why?

The 7130SA25J8 has four GND pins (1, 24, 25, 48) and two VCC pins (23, 26) in its 48-pin ceramic flatpack package. This multi-pin power/ground distribution minimizes impedance in high-speed switching paths, reduces simultaneous switching noise, and ensures stable voltage delivery across the die-critical for maintaining 25 ns timing margins and preventing BUSY arbitration glitches.

Can the 7130SA25J8 be used without external pull-up resistors on BUSY and INT pins?

No, external pull-up resistors are mandatory for BUSYL, BUSYR, INTL, and INTR pins on the 7130SA25J8. These are open-drain outputs per datasheet Note 1 and Figure 3; without pull-ups, asserted states cannot be reliably detected. Typical values are 4.7 kΩ to VCC, selected to meet VOL ≤ 0.5 V at IOL = 16 mA while minimizing rise time.

Is the 7130SA25J8 pin-compatible with the IDT7140 SLAVE device?

No, the 7130SA25J8 is not pin-compatible with IDT7140 devices. While both share the same 48-pin FP48 footprint, their pin functions differ significantly: 7130SA25J8 has BUSYL/BUSYR as outputs, whereas IDT7140 uses those pins as inputs. Additionally, interrupt behavior (INTL/INTR generation vs. sensing) and internal arbitration logic are asymmetric-requiring careful PCB layout separation in MASTER/SLAVE designs.