PT2221-001 Infrared Remote Control Transmitter IC SMD

PT2221-001 Infrared Remote Control Transmitter IC SMD

The PT2221-001 is a compact CMOS infrared remote-control encoder packaged in a 20-pin SO footprint, engineered for handheld consumer remote transmitters. It integrates a key-scan matrix and internal timing/encoding logic so multiple keypad inputs can be converted into serial IR code with minimal external circuitry. The small footprint and low standby current make it ideal for battery-powered handsets.

Internally the PT2221 scans key inputs, encodes function/customer codes and provides the serial data stream suitable for IR LED drivers and transmitter front-ends. A dedicated SEL input enables extended code sets, allowing designers to double the available function codes without changing the basic hardware. The device is pin-to-pin compatible with common NEC encoder parts, easing redesign or replacement.

The datasheet includes simple application circuits (oscillator/resonator, LED driver resistor and key-matrix wiring) so engineers can move from prototype to production quickly. With a recommended supply range that supports single-cell battery operation and low quiescent consumption, the PT2221-001 is a practical choice for TVs, audio equipment, set-top boxes and other consumer electronics requiring a reliable, low-cost IR encoder.

Features:

• CMOS technology.
• Low power consumption (VDD = 2.0 – 5.5 V).
• Pin-to-pin compatible with NEC µPD6121.
• SEL input supports expanded function/code capacity (64 + 6 with SEL).
• Simple application circuit for quick prototyping.

Specifications:

Pin Configuration:

Applications:

• Audio Equipment.
• Television (TV).
• Cable TV Tuner.
• Video Cassette Recorder (VCR).
• Cassette Deck.
• Air Conditioner.
• Video Compact Disk (VCD).
• DVD ROM/Player.
• Computer / Multi-Media Personal Computer System.

Package Contents:

• 1x PT2221-001 Infrared Remote Control Transmitter IC SMD

Datasheet