NTE1738 Integrated Circuit TV Remote Control Receiver Description: The NTE1738 is a 29–function remote–control receiver circuit manufactured by aluminum–gate CMOS technology for use in television receivers, audio equipment, and the like using infrared for transmission. It enables direct control of 12 functions at the receiver. Features: D Single Power Supply D Wide Supply Voltage Range: 8V to 14V D Low Power Dissipation D On–Chip Oscillator D Low–Cost LC or Ceramic Oscillator used in Determining Reference Frequency (480kHz or 455kHz) D Information is Transmitted by Pulse Code Modulation D Good Noise Immunity–Instructions are not Executed unless the Same Code is Received Three or more Times in Succession D Single Transmission Frequency (40kHz or 38kHz) for Carrier Wave D 16 TV Channels Selected Directly D Three Analog Functions — Volume, Brightness and Color Saturation — are Independently Controlled to 64 Stages by Three 6–Bit D/A Converters. D 12 Instructions are Controlled at the NTE1738 Receiver, as well. D Has Large Tolerance in Operating Frequency between the Transmitter and the Receiver Application: D Remote–Control Receiver for TV or other Applications Function: The NTE1738 is designed to decode and execute instructions after three successive receptions of the identical instruction code, providing a good noise immunity. Instructions comprise direct selection of 16 channels, channel position high and low, color saturation high and low, normalization of volume, brightness and color saturation, sound mute on and off, TV main power on and off, and output CALL on and off. In addition, 12 functional instructions can be entered from the receiver. Absolute Maximum Ratings: Supply Voltage (With respect to VSS), VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 15V Input Voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VSS ≤ VI ≤ VDD Output Voltage, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VSS ≤ VO ≤ VDD Maximum Power Dissipation (TA = +25°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300mW Operating Free–Air Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +126°C Recommended Operating Conditions: Parameter Symbol Test Conditions Min Typ Max Unit Supply Voltage VDD 8 12 14 V Oscillation Frequency fOSC – 455 – kHz – 480 – kHz 5 – – VP–P Input Voltage, SI VI Electrical Characteristics: (TA = +25°C, VDD = 12V unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Supply Voltage VDD TA = –30° to +70°C, fOSC = 455kHz 8 12 14 V Supply Current IDD fOSC = 455kHz – 2 5 mA Pull–Up Resistance I1 to I3 RI – 20 – kΩ Low Level Output Currents FA to FD IOL VO = 12V 5 – – mA Low Level Output Currents CH UP, CH DOWN, CH RESET IOL VO = 12V 20 – – mA Off–State Output Currents CH UP, CH DOWN, CH RESET IOZH VO = 12V – – 1 µA Low Level Output Currents P0 to P3 IOL VO = 12V 20 – – mA Off–State Output Currents P0 to P3 IOZH VO = 12V – – 1 µA High Level Output Currents VO, BR, CS IOH VO = 0V –7 – – mA Low Level Output Currents VO, BR, CS IOL VO = 12V 7 – – mA High Level Output Currents POWER ON/OFF, CALL MUTE IOH VO = 0V –20 – – mA Low Level Output Currents POWER ON/OFF, CALL MUTE IOL VO = 12V 5 – – mA High Level Output Current IR IOH VO = 0V –15 – – mA Low Level Output Current IR IOL VO = 12V 5 – – mA Pin Connection Diagram Power ON Input (0V) VSS Transmission Signal Input Automatic Clear Input Key Input I1 Key Input I2 Key Input I3 Scanner Output FA Scanner Output FB Scanner Output FC Scanner Output FD OSC Input OSC Output VDD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 1 15 28 Reception Indication Output CH RESET CH UP CH RUN Channel Control Output P0 Channel Control Output P1 Channel Control Output P2 Channel Control Output P3 Power ON/OFF Control Output Call Control Output Sound Mute Indication Output D/A Output VO D/A Output BR D/A Output CS 1.469 (37.32) Max .540 (13.7) .250 (6.35) .100 (2.54) 1.300 (33.02) .122 (3.1) Min .600 (15.24)