TC7211AMIPL TELCOM [TelCom Semiconductor, Inc], TC7211AMIPL Datasheet

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TC7211AMIPL

Manufacturer Part Number
TC7211AMIPL
Description
BUS COMPATIBLE 4-DIGIT CMOS DECODER/DRIVER
Manufacturer
TELCOM [TelCom Semiconductor, Inc]
Datasheet
FEATURES
PIN CONFIGURATIONS
BUS COMPATIBLE 4-DIGIT CMOS DECODER/DRIVER
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 Compatible and Functionally Equivalent to
ICM7211AM
TELCOM SEMICONDUCTOR, INC.
D2
E2
G2
F2
A3
B3
C3
D3
E3
G3
A4
V
E1
G1
F1
BP
A2
B2
C2
F3
+
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
TC7211AM (LCD)
39
32
31
30
28
40
38
37
36
35
34
33
29
27
26
25
24
23
22
21
A1
OSCILLATOR
GND
CHIP SELECT 2 (CS2)
CHIP SELECT 1 (CS1)
DIGIT SELECT 2 (DS2
DIGIT SELECT 1 (DS1
B3
B2
B1
B0
F4
G4
E4
D4
C4
B4
D1
C1
B1
DATA
INPUTS
GENERAL DESCRIPTION
rect drive, 4-digit, 7-segment display decoder and driver.
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.
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 de-
coded to the seven segment display format.
ORDERING INFORMATION
Part No.
TC7211AMIPL
The TC7211AM (LCD Decoder/driver) is a CMOS di-
The TC7211AM drives conventional LCDs. An RC os-
The four bit binary input is decoded into the seven
Driver
Type
LCD
Package Code
40-Pin
Plastic DIP
Input
Code B
TC7211AM
TC7211AM-4 11/14/96
Digit Select
Data and
Config.
Output
Latches
6-7
1
2
3
4
5
6
7
8

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TC7211AMIPL Summary of contents

Page 1

... B". The "Code B" output format results 9,— blank display. True BCD or binary inputs will be correctly de- coded to the seven segment display format. ORDERING INFORMATION Part No. TC7211AMIPL DATA INPUTS TC7211AM Driver Input Output ...

Page 2

TC7211AM FUNCTIONAL BLOCK DIAGRAM TC7211AM GND LATCH ENABLE PROGRAMMABLE 4-TO-7 DECODER DATA 4-BIT 29 B2 INPUTS LATCH 30 B3 ENABLE 31 DS1 DIGIT 2-BIT SELECT 32 DS2 LATCH INPUTS ENABLE 33 ...

Page 3

BUS COMPATIBLE, 4-DIGIT CMOS DECODER/DRIVER ABSOLUTE MAXIMUM RATINGS* Supply Voltage ........................................................ +6.5V Input Voltage, Any Terminal (Note 2) .................................... V Power Dissipation (Note 1) ................... 1.23W A Operating Temperature Range ................ – +85 C Storage ...

Page 4

TC7211AM TIMING DIAGRAMS CS1 (CS2) CS2 (CS1) DATA AND DIGIT SELECT CODE OSCILLATOR FREQUENCY BACKPLANE INPUT/OUTPUT OFF SEGMENTS ON SEGMENTS 6-10 t CSA t ICS DON’T CARE Figure 1: BUS Interface Timing Diagram 128 CYCLES 64 ...

Page 5

BUS COMPATIBLE, 4-DIGIT CMOS DECODER/DRIVER INPUT DEFINITIONS + In this table, V and GND are considered to be normal operating input logic levels. For lowest power consumption, input signals should swing over the full supply. Input Pin No. Condition + ...

Page 6

TC7211AM TYPICAL CHARACTERISTICS Operating Supply Current vs Supply Voltage 30 LCD DEVICES DISPLAY BLANK – PIN 36 OPEN + + ...

Page 7

BUS COMPATIBLE, 4-DIGIT CMOS DECODER/DRIVER portion duration is less than 1 sec. The backplane disable sensing circuit will not respond to such a short signal 8-DIGIT LCD BACKPLANE BACKPLANE MASTER SLAVE 28 ...

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