Renesas 7201LA15TPGI

Overview

7201LA15TPGI from Renesas Electronics (formerly IDT) is a 512 × 9-bit asynchronous CMOS FIFO memory IC used for rate buffering and data synchronization between mismatched clock domains or bus protocols. It features 15 ns access time, ultra-low active power (440 mW max), full/half-full/empty status flags, and retransmit capability. It is deployed in industrial communications interfaces requiring deterministic latency and overflow/underflow protection.

For engineers reviewing the 7201LA15TPGI datasheet, 7201LA15TPGI pinout, 7201LA15TPGI application, or 7201LA15TPGI equivalent, key selection considerations include its 512-word depth, 9-bit data width with parity support, TSSOP-28 package, industrial temperature range (–40°C to +85°C), and compatibility with depth/width expansion architectures.

Technical Context

The 7201LA15TPGI implements a dual-port ring-buffer architecture with independent read/write pointers, eliminating address management overhead. Its asynchronous operation allows fully independent W and R control signals, enabling simultaneous read/write without handshake logic.

It supports three operating modes: single-device (XI grounded), depth expansion (daisy-chained via XI/XO), and width expansion (parallel data buses). The FL/RT pin serves dual roles-first-load enable in depth expansion and retransmit trigger in single mode-while XO/HF provides half-full indication or expansion signaling depending on configuration.

Key Specifications

Pinout & Package

7201LA15TPGI is housed in a 28-pin Thin Plastic DIP (TP) package, measuring 0.300" wide, with gull-wing leads and RoHS-compliant green finish (suffix 'G'). Pin count and layout match industry-standard 28-pin DIP footprints.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 7201LA15TPGI, the 7201LA20TPGI trades 5 ns of access speed for marginal power reduction and cost savings, while the 7201LA15SOI maintains identical timing but changes package form factor - affecting thermal dissipation, board space, and soldering process compatibility.

Availability

7201LA15TPGI is available at Aetrix Electronics and suitable for industrial serial bridges, motor control data buffering, legacy protocol repeaters, and test equipment pattern memory requiring stable component supply and long-term obsolescence management.

Supply support for 7201LA15TPGI 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 timing solutions, formed through the merger of NEC Electronics and Renesas Technology.

The IDT7200/7201/7202 family was originally developed by Integrated Device Technology (acquired by Renesas in 2019) to address deterministic data buffering needs in industrial, military, and telecom infrastructure where asynchronous rate adaptation is critical.

FAQ

What is the memory organization of the 7201LA15TPGI?

The 7201LA15TPGI implements a 512 × 9-bit first-in/first-out memory array. This means it stores up to 512 words, each 9 bits wide - the extra bit beyond standard 8-bit bytes supports parity generation or control signaling. The architecture uses internal ring pointers, so no external address lines are needed; data is loaded and unloaded sequentially via W and R strobes. This organization is confirmed in the IDT7201LA datasheet section "Features" and "Description".

Does the 7201LA15TPGI support industrial temperature operation?

Yes, the 7201LA15TPGI is rated for industrial temperature operation from –40°C to +85°C. This is explicitly stated in the "Recommended DC Operating Conditions" table and reinforced in the "Ordering Information" section, where the 'I' suffix denotes industrial temperature range. The device uses CMOS technology qualified to meet these specifications across all speed grades, including the 15 ns variant.

How does the retransmit (RT) function work on the 7201LA15TPGI?

The RT function on the 7201LA15TPGI resets the internal read pointer to the first memory location when the FL/RT pin is pulsed LOW, while leaving the write pointer unchanged. This enables immediate replay of buffered data - useful in communication protocols requiring retransmission after error detection. The feature is only active in single-device mode (XI grounded) and is disabled during depth expansion. Timing requirements for RT pulse width and setup are specified in the AC Electrical Characteristics table.

What package type is used for the 7201LA15TPGI?

The 7201LA15TPGI uses a 28-pin Thin Plastic DIP (TP) package, also referred to as TSSOP-28 in modern terminology. The 'TP' in the part number directly maps to this package per the IDT ordering guide. It features a 0.300"-wide body, gull-wing leads, and RoHS-compliant green finish (indicated by the final 'G'). Pinout matches standard 28-pin DIP footprints, enabling drop-in replacement in legacy designs.

Can multiple 7201LA15TPGI devices be cascaded for greater depth?

Yes, the 7201LA15TPGI supports depth expansion via its XI (Expansion In) and XO/HF (Expansion Out) pins. By connecting XO of one device to XI of the next and grounding FL on the first device, up to any number of units can be daisy-chained to increase total word depth - e.g., three devices yield 1,536 × 9 bits. However, in this mode, the RT and HF functions are disabled, and composite EF/FF flags must be generated externally using OR logic across all units.