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TC7211AMIPL Datasheet

  • TC7211AMIPL

  • BUS COMPATIBLE 4-DIGIT CMOS DECODER/DRIVER

  • 91.41KB

  • 7頁

  • TELCOM

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1
TC7211AM
BUS COMPATIBLE 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, 鈥? E, H, L, P, Blank)
Pin Compatible and Functionally Equivalent to
ICM7211AM
2
3
4
5
6
7
GENERAL DESCRIPTION
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
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
B" output format results in a 0 to 9,鈥? E, H, L, P or blank
display. True BCD or binary inputs will be correctly de-
coded 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
LCD
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
8
TC7211AM-4 11/14/96
TELCOM SEMICONDUCTOR, INC.
6-7

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