|Description||Bus Compatible 4-digit CMOS Decoder/driver|
|Datasheet||Download TC7211AMIPL datasheet
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 L, P, Blank) Pin Compatible and Functionally Equivalent to ICM7211AM
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 P or blank display. True BCD or binary inputs will be correctly decoded to the seven segment display format.
A1 36 OSCILLATOR 35 GND 34 CHIP SELECT (CS2) 33 CHIP SELECT (CS1) 32 DIGIT SELECT (DS2 31 DIGIT SELECT (DS1 TC7211AM (LCD) 21 B4 DATA INPUTSD4 SEGMENT OUTPUTS g 7 WIDE DRIVER 7 WIDE LATCH ENABLE PROGRAMMABLE 4-TO-7 DECODER B3 a
7 WIDE DRIVER 7 WIDE LATCH ENABLE PROGRAMMABLE 4-TO-7 DECODER
2-TO-4 DECODER ENABLE BACK PLANE DRIVER ENABLE BACKPLANE (INPUT/OUTPUT)
Supply Voltage........................................................ +6.5V Input Voltage, Any Terminal (Note V+ +0.3V, GND 0.3V Power Dissipation TA 70°C (Note 1)................... 1.23W Operating Temperature Range................ to +85°C Storage Temperature Range................. to +150°C Lead Temperature (Soldering, 10 sec)................. +300°C
*Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. NOTES: 1. This limit refers to that of the package and will not be realized during normal operation. 2. Due to the SCR structure inherent in the CMOS process, connecting any terminal to voltages greater than V+ or less than GND may cause destructive latch-up. For this reason, it is recommended that inputs from external sources not operating on the same power supply not be applied to the device before its supply is established, and, in multiple supply systems, the supply to the TC7211AM be turned on first.VSUP IOP IOSCI tRFS tRFB fOSC fBP VIH VIL IILK CIN IBPLK CBPI
Operating Voltage Range Operating Current Oscillator Input Current Segment Rise/Fall Time Backplane Rise/Fall Time Oscillator Frequency Backplane Frequency Logic "1" High Input Voltage Logic "0" Low Input Voltage Input Leakage Current Input Capacitance BP Input Current Leakage BP Input CapacitanceChip Select Active Pulse Width Data Setup Time Data Hold Time Inter-Chip Select Time
NOTE: 1. Other chip select (CS) is either held at logic zero or both CS1 and CS2 driven together.
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