TC7211AM Datasheet, PDF (1/7 Pages) TelCom Semiconductor, Inc – BUS COMPATIBLE 4-DIGIT CMOS DECODER/DRIVER

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TC7211AM
BUS COMPATIBLE 4-DIGIT CMOS DECODER/DRIVER
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FEATURES
GENERAL DESCRIPTION
s 4-Digit Non-Multiplexed 7-Segment LCD Outputs
With Backplane Driver
s Input and Digit Select Data Latches
s RC Oscillator On-Chip Generates Backplane
Drive Signal
s Eliminates DC Bias Which Degrades LCD Life
s Backplane Input/Output Pin Permits
Synchronization of Cascaded Slave Device to
a Master Backplane Signal
s Binary and BCD Inputs Decoded to Code B
(0 to 9, —, E, H, L, P, Blank)
s Pin Compatible and Functionally Equivalent to
ICM7211AM
PIN CONFIGURATIONS
The TC7211AM (LCD Decoder/driver) is a CMOS di-
rect drive, 4-digit, 7-segment display decoder and driver.
The TC7211AM drives conventional LCDs. An RC os-
cillator, divider chain, backplane driver, and 28-segment
3 ^{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-of-
phase for an ON segment. The net DC voltage applied
between driver segment and backplane is near zero maxi-
mizing display lifetime.
The four bit binary input is decoded into the seven
segment alphanumeric code known as "Code B". The "Code
4 ^{B" output format results in a 0 to 9,—, E, H, L, P or blank}
display. True BCD or binary inputs will be correctly de-
coded to the seven segment display format.
ORDERING INFORMATION
V⁺ 1
40 D1
E1 2
39 C1
G1 3
38 _B1
F1 4
37 A1
BP 5
36 OSCILLATOR
A2 6
35 GND
B2 7
34 CHIP SELECT 2 (CS2)
C2 ⁸
33 CHIP SELECT 1 (CS1)
D2 9
32 DIGIT SELECT 2 (DS2
E2 10
31 DIGIT SELECT 1 (DS1
G2 11 ^{TC7211AM (LCD)} 30 B3
F2 12
A3 13
29 B2
28 _B1
DATA
INPUTS
B3 14
27 B0
C3 15
26 F4
D3 16
25 _G4
E3 17
24 E4
G3 18
23 D4
F3 19
22 C4
A4 20
21 _B4
TELCOM SEMICONDUCTOR, INC.
Part No.
Driver
Input
Type Package Code
TC7211AMIPL LCD
40-Pin Code B
Plastic DIP
Output
5 ^Config.
Data and
Digit Select
Latches
6
7
TC7211AM-4 11/14/96
6-7
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