Renesas 74FCT3244APGG8

Overview

74FCT3244APGG8 from Renesas Electronics is a 3.3V CMOS octal buffer/line driver with dual-nibble 3-state control, 4.8 ns max propagation delay (FCT3244A), ±60 mA output drive, and industrial temperature range (–40°C to +85°C). It serves as a memory address/data driver or clock distribution buffer in high-speed digital systems.

For engineers reviewing the 74FCT3244APGG8 datasheet, 74FCT3244APGG8 pinout, 74FCT3244APGG8 application, or 74FCT3244APGG8 equivalent, key selection criteria include 3-state enable timing (tPZH/tPHZ ≤ 6.2 ns), rail-to-rail output swing, low static power (0.4 μW typ.), and TSSOP-20 package compatibility with dense PCB layouts.

Technical Context

The 74FCT3244APGG8 implements two independent 4-bit groups (1A1–1A4/1Y1–1Y4 and 2A1–2A4/2Y1–2Y4), each controlled by its own active-low 3-state enable (1OE, 2OE). Inputs feature hysteresis (150 mV typ.) for noise immunity in noisy bus environments.

It operates across VCC = 2.7V–3.6V with guaranteed logic levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V), supports TTL-compatible inputs, and delivers VOH ≥ 2.4 V at –8 mA and VOL ≤ 0.2 V at 16 mA under industrial conditions.

Key Specifications

Pinout & Package

TSSOP-20 package (PGG20), 4.4 mm × 6.5 mm body, 0.65 mm lead pitch, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal buffer applications.

Compared with 74FCT3244APGG8, the 74LVC244APW offers lower power but reduced noise margin and drive strength, while the SN74AHCT244N provides 5 V compatibility at the cost of speed and 3.3 V operation - making the 74FCT3244APGG8 optimal for new industrial 3.3 V designs requiring robustness and timing precision.

Availability

74FCT3244APGG8 is available at Aetrix Electronics and suitable for industrial control systems, network interface cards, and embedded computing platforms requiring stable component supply and long-term lifecycle support.

Supply support for 74FCT3244APGG8 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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and enterprise applications.

The 74FCT3244APGG8 belongs to Renesas' FCT logic family, engineered for high-speed, low-power 3.3 V bus interfacing in industrial and communications equipment where timing accuracy and noise resilience are critical.

FAQ

What is the maximum operating frequency supported by the 74FCT3244APGG8?

The 74FCT3244APGG8 does not specify a maximum clock frequency directly, but its 4.8 ns maximum propagation delay (tPLH/tPHL) supports reliable operation in synchronous bus systems up to approximately 150 MHz when used with appropriate setup/hold margins. Actual usable frequency depends on load capacitance, trace routing, and system-level timing constraints - design validation is required for frequencies above 100 MHz.

Does the 74FCT3244APGG8 support hot-swap or live-insertion?

No, the 74FCT3244APGG8 is not designed for hot-swap operation. Its absolute maximum terminal voltage ratings (e.g., VTERM = –0.5 V to VCC+0.5 V on outputs) and lack of power-up/down sequencing protection mean that applying signal voltages before VCC stabilization may cause latch-up or damage. System-level hot-swap capability requires external protection circuitry and controlled power sequencing.

Is the 74FCT3244APGG8 pin-compatible with the 74FCT3244APGG?

Yes, the 74FCT3244APGG8 is functionally and pin-compatible with the tube-packaged 74FCT3244APGG. Both share identical TSSOP-20 (PGG20) footprint, pinout, electrical specifications, and timing characteristics. The "8" suffix denotes tape-and-reel packaging, not a functional revision - no PCB layout changes are needed when substituting between these variants.

What is the purpose of the hysteresis on the 74FCT3244APGG8 inputs?

The 150 mV typical input hysteresis on the 74FCT3244APGG8 increases noise immunity on control inputs such as 1OE and 2OE by creating separate threshold voltages for rising and falling edges. This prevents multiple output transitions during slow or noisy signal edges - especially valuable in industrial environments with EMI-prone wiring or long traces carrying chip-select or enable signals.

Can the 74FCT3244APGG8 drive a 50 Ω transmission line directly?

Yes, the 74FCT3244APGG8 can drive a 50 Ω transmission line directly under DC conditions: its ±60 mA output drive exceeds the 60 mA required for a 3.3 V signal into 50 Ω (66 mA). However, for high-frequency signals (>20 MHz), impedance matching and signal integrity require careful PCB layout (controlled impedance traces, proper termination), as the device's output impedance is not precisely 50 Ω and lacks slew-rate control.