NTE1414 Integrated Circuit Digital AC Clock Timer for VCR Description: The NTE1414 is an LSI integrated circuit in a 40–Lead DIP type package designed for AC INPUT clock timers capable of randomly setting “ON hour” and “OFF hour” by a unit of a minute. This device can also work as a stopwatch timing up to 1 hour, 59 minutes and 59 seconds, and as a sleep timer operating for not more than 1 hour and 59 minutes once it is set. A current hour, “ON hour”, and “OFF hour” can be set easily in one of the following three modes: FAST mode, in which the data of figures of minutes are sent fast at 50Hz or 60Hz; SLOW mode, in which they are sent slow at 2Hz; and REVERSE, mode in which they are sent reversely. Features: D Complete Two–Operation/24 Hour Timer D Alternate Current of 50Hz/60Hz Entered D AM/PM or 24 Hour Display D Hours can be Set in FORWARD or REVERSE Mode D Sleep Timer Operation for not more than 1 Hour, 59 Minutes once it is Set D Stopwatch Timing up to 1 Hour, 59 Minutes, and 59 Seconds D Capable of Directly Driving a Fluorescent Lamp Tube D Power Failure Indicator Absolute Maximum Ratings: (VSS = 0, TA = +25°C unless otherwise specified) Supply Voltage, VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –16 to +0.3V Input Voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –17 to +0.3V Output Voltage, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –26 to +0.3V Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C Recommended Operating Conditions: (TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Supply Voltage VDD VSS = 0 –10 – –15 V Supply Voltage Fall Detect Voltage VPF VSS = 0 – – –10 V Electrical Characteristics: (VDD = –12V, VSS = 0, TA = +25°C unless otherwise specified) Parameter Symbol Supply Current IDD Test Conditions No Load Min Typ Max Unit – 1.3 5.0 mA DC 50/60 10k Hz 50Hz/60Hz Input Terminal Input Frequency fi High Level Input Voltage VIH (1) VSS = 0 0 – –1 V Low Level Input Voltage VIL (1) VSS = 0 VDD+1 – –16 V High Level Input Voltage VIH (2) VSS = 0 0 – –1 V Low Level Input Voltage VIL (2) VSS = 0 VDD+1 – VDD V – 12 – mA – – –22 V – 6 – mA All Other Input Terminals PM Output Terminal (In 24 Hour Display Mode) High Level Output Current IOH (1) VO = –3V Output Voltage Breakdown BVO (1) IO = –10µA 10’s of Hour and 10’s of Minute – Figure Display Output Terminal (b & c) (a & d) High Level Output Current IOH (2) VO = 3V Output Voltage Breakdown BVO (2) IO = –10µA – – –22 V High Level Output Current IOH (3) – 3 – mA Output Voltage Breakdown BVO (3) IO = –10µA – – –22 V 500 – – µA – – –22 V Other Display Output Terminals VO = –3V Other Output Terminals High Level Output Current IOH (4) VO = –2V Output Voltage Breakdown BVO (4) IO = –10µA Pin Connection Diagram AM 1 40 PM 10 Hrs – b & c 2 39 1Hz Output Hrs – f 3 38 12/24 Select Hrs – g 4 37 Blanking Hrs – a 5 36 50/60 Select Hrs – b 6 Hrs – d 7 35 50/60 Input 34 Forward/Reverse Hrs – c 8 33 Slow Hrs – e 9 32 Fast 10 Mins – f 10 31 MS 1 10 Mins – g 11 10 Mins – a & d 12 30 MS 2 10 Mins – b 13 29 MS 3 10 Mins – e 14 28 VSS 27 VDD 10 Mins – c 15 26 Timer OFF Input Mins – f 16 25 Timer ON Input Mins – g 17 24 Timer Output Mins – a 18 Mins – b 19 23 Timer Output 22 Mins – c Mins – e 20 21 Mins – a 40 21 1 20 2.055 (52.2) .550 (13.9) Max .155 (3.9) .100 (2.54) .019 (0.5) .137 (3.5) .650 (16.5)