TC7211AM Datasheet | TelCom Semiconductor

BUS PATIBLE 4-DIGIT CMOS DECODER/DRIVER Features s s s s s 4-Digit Non-Multiplexed 7-Segment LCD Outputs With Backplane Driver Input and Digit Select Data Latches RC Oscillator On-Chip Generates Backplane Drive Signal Eliminates DC Bias Which Degrades LCD Life Backplane Input/Output Pin Permits Synchronization of Cascaded Slave Device to a Master Backplane Signal Binary and BCD Inputs Decoded to Code B (0 to 9, - , E, H, L, P, Blank) Pin patible and Functionally Equivalent to ICM7211AM 2 3 4 5 6 7 GENERAL DESCRIPTION The TC7211AM (LCD Decoder/driver) is a CMOS direct drive, 4-digit, 7-segment display decoder and driver. The TC7211AM drives conventional LCDs. An RC oscillator, divider chain, backplane driver, and 28-segment outputs are provided on a single CMOS chip. The segment drivers supply square waves of the same frequency as the backplane, but in-phase for an OFF segment and out-ofphase for an ON segment. The net DC voltage applied between driver segment and backplane is near zero maximizing display lifetime. The four bit binary input is decoded into the seven segment alphanumeric code known as "Code B". The "Code B" output format results in a 0 to 9,- , E, H, L, P or blank display. True BCD or binary inputs will be correctly decoded to the seven segment display format. s s PIN CONFIGURATIONS ORDERING INFORMATION V+ E1 G1 F1 BP A2 B2 C2 D2 1 2 3 4 5 6 7 8 9 40 D1 39 C1 Part No. TC7211AMIPL Driver Type Input Package Code 40-Pin Code B Plastic DIP Output Config. Data and Digit Select Latches 38 B1 37 A1 36 OSCILLATOR 35 GND 34 CHIP SELECT 2 (CS2) 33 CHIP SELECT 1 (CS1) 32 DIGIT SELECT 2 (DS2 31 DIGIT SELECT 1 (DS1 TC7211AM (LCD) 30 B3 29 B2 28 B1 27 B0 26 F4 25 G4 24 E4 23 D4 22 C4 21 B4 DATA INPUTS .. E2 10 G2 11 F2 12 A3 13 B3 14 C3 15 D3 16 E3 17 G3 18 F3 19 A4 20 TC7211AM-4 11/14/96 TEL SEMICONDUCTOR, INC. 6-7 BUS PATIBLE, 4-DIGIT CMOS DECODER/DRIVER TC7211AM FUNCTIONAL BLOCK...