The µPD6121, 6122 are infrared remote control transmission ICs using the NEC transmission format that are ideally suited for TVs, VCRs, audio equipment, air conditioners, etc. By combining external diodes and resistors, a maximum of 65,536 custom codes can be specified. These ICs come in small packages, thus facilitating the design of light and compact remote control transmitters. The NEC transmission format consists of leader codes, custom codes (16 bits), and data codes (16 bits). It can be used for various systems through decoding by a microcontroller.

Low-voltage operation: VDD 3.3 V Low current dissipation: 1 µA Max. (at standby) Custom codes: 65,536 (set by external diodes and resistors) Data codes: µPD6121: 32 codes (single input), 3 codes (double input), expandable to 64 codes through SEL pin µPD6122: 64 codes (single input), 3 codes (double input), expandable to 128 codes through SEL pin

µPD6121, 6122 are transmission code-compatible (NEC transmission format) with the µPD1913CNote, 1943GNote,

µPD6121G-001 is pin-compatible with the µPD1943G (However, capacitance of capacitor connected to oscillator pin and other parameters vary) µPD6122G-001 is pin-compatible with the µPD6102G (However, capacitance of capacitor connected to oscillator pin and other parameters vary)

Note Provided for maintenance purpose only When using this product (in NEC transmission format), please order custom codes from NEC. New custom codes for the µPD6121G-002, µPD6122G-002 cannot be ordered.

The information in this document is subject to change without notice. Document No. U10114EJ6V0DS00 (6th edition) (Previous No. IC-1813) Date Published October 1995 P) Printed in Japan The mark

Part number µPD6122G-001 µPD6122G-002 Package 20-pin plastic SOP (375 mil) 20-pin plastic SOP (375 mil) 24-pin plastic SOP (375 mil) 24-pin plastic SOP (375 mil) Description Standard (Ver I spec.) Standard (Ver II spec.) Standard (Ver I spec.) Standard (Ver II spec.)

CCS KI 7 LMP : Custom code selection input Key input Key input/output Lamp output Resonator connection pin REM : SEL SS : Remote output SEL input Power supply pin GND pin

Part number Item Operating voltage Current consumption (at standby) Custom codes Data codes No. of KI pins No. of KI/O pins SEL pin Transmission format Package 32 Provided NEC transmission format 20-pin plastic SOP (375 mil) 24-pin plastic SOP (375 mil) 65,536 (16-bit setting) 8 µPD6121 VDD 1 µA MAX. µPD6122