Renesas 7203L12JG8

Overview

IDT7203L12JG8 from Integrated Device Technology is a 2,048 x 9-bit asynchronous CMOS FIFO memory buffer with 12 ns access time, operating at 5 V supply, and housed in a 32-lead PLCC (J) package. It supports simultaneous independent read/write operations, features Empty/Full/Half-Full status flags, and enables retransmit functionality for data replay in rate-mismatched interfaces such as UART-to-DSP bridging.

For engineers reviewing the IDT7203L12JG8 datasheet, IDT7203L12JG8 pinout, IDT7203L12JG8 application, or IDT7203L12JG8 equivalent, key selection criteria include its 12 ns access timing, 5 V single-supply operation, PLCC-32 footprint compatibility, industrial temperature range support (–40°C to +85°C), and dual-purpose XI/XO expansion logic for depth/width scalability.

Technical Context

The IDT7203L12JG8 implements a fully asynchronous dual-port architecture with independent write and read pointers managed by internal control logic. Its 9-bit data path includes D0–D8 inputs and Q0–Q8 outputs, with status flags (EF, FF, XO/HF) driven synchronously to read/write edges but not clocked - enabling seamless integration between mismatched bus domains.

It supports three primary operating modes: Single Device (XI grounded), Depth Expansion (XI tied to prior XO), and Width Expansion (parallel devices sharing R/W/RS). Retransmit (RT) resets only the read pointer without affecting write position, and the Half-Full Flag (HF) is active only in Single Device Mode - both functions are disabled during depth expansion.

Key Specifications

Pinout & Package

Package: 32-lead Plastic Leaded Chip Carrier (PLCC), J32-1, body size 11.43 mm × 11.43 mm, gull-wing leads, JEDEC MS-026 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FIFO memory applications.

Compared with SN74ACT2227N and ICS7203L12JG, the IDT7203L12JG8 offers unique retransmit capability and expansion flexibility - making it superior for multi-device buffering systems where deterministic replay or scalable depth is required, while ICS7203L12JG provides identical performance with enhanced lifecycle support.

Availability

IDT7203L12JG8 is available at Aetrix Electronics and suitable for industrial PLCs, test equipment, legacy bus adapters, and embedded communication interfaces requiring stable component supply across extended product lifecycles.

Supply support for IDT7203L12JG8 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, Inc. (IDT) was a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance interconnect solutions before its acquisition by Renesas Electronics in 2019.

The IDT7203L12JG8 belongs to the IDT720x family of asynchronous FIFOs, designed specifically for rate-matching and data buffering in mixed-speed digital systems - especially where deterministic latency and hardware flow control are critical.

FAQ

What is the maximum operating frequency supported by the IDT7203L12JG8?

The IDT7203L12JG8 does not operate on a clock signal - it is fully asynchronous. Its maximum effective throughput is determined by access time (12 ns) and cycle timing: t_RC = 20 ns read cycle and t_WC = 20 ns write cycle support sustained 50 MHz data rates in ideal conditions. Real-world throughput depends on host interface timing margins and flag response latency.

Does the IDT7203L12JG8 support 3.3 V operation?

No, the IDT7203L12JG8 is specified only for 4.5 V to 5.5 V operation. Its input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) and output drive levels (VOH = 2.4 V min, VOL = 0.4 V max) are optimized for 5 V TTL/CMOS compatibility. Using it with 3.3 V logic requires level-shifting circuitry.

Can the IDT7203L12JG8 be used in depth expansion mode with other IDT720x family members?

Yes - all IDT720x devices (IDT7203 through IDT7208) share identical pinouts and expansion logic. The IDT7203L12JG8 can serve as the first device in a depth chain with any higher-capacity variant (e.g., IDT7204L12JG) as downstream units, provided FL/RT is grounded on the first and pulled high on others, and XI/XO signals are daisy-chained correctly.

What happens to the read pointer during a retransmit operation on the IDT7203L12JG8?

During a retransmit (RT pulse LOW), the read pointer is reset to the first memory location (address zero), while the write pointer remains unchanged. This allows immediate replay of buffered data from the beginning without disturbing ongoing write operations - a feature confirmed in the functional description and truth table for Single Device Mode.

Is the PLCC package of the IDT7203L12JG8 lead-free compliant?

The "G" suffix in IDT7203L12JG8 denotes green (lead-free) construction per IDT's ordering nomenclature. It uses matte tin plating over copper leads and complies with RoHS Directive 2011/65/EU. Legacy SnPb versions (without "G") were discontinued per PDN# SP-17-02.