TC7211AM

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 PermitsSynchronization 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 Compatible and Functionally Equivalent to ICM7211AM

Supply Voltage ............................................................ +6.5V
Input Voltage, Any Terminal
(Note 2) .............................................. V+ +0.3V, GND 0.3V
Power Dissipation TA £ 70°C (Note 1) ........................1.23W
Operating Temperature Range ................ 20°C to +85°C
Storage Temperature Range ................. 65°C 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, itis 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.

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 of the TC7211AM 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.