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U426B-FP Datasheet

  • U426B-FP

  • INFRARED DRIVER

  • 6頁

  • TEMIC

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U426B
Infrared Driver
Description
The U426B is an IR-driver IC for IR data communication.
The circuit contains a programmable constant current
source (DRV) to drive the IRED. The current is pro-
grammed by an external resistor (R
S
). With the internal
comparator (COMP) an external voltage can be moni-
tored. The low-power standby mode, controlled by means
of the WAKE input, makes the circuit well suited for bat-
tery-powered systems.
Features
D
D
D
D
D
Programmable constant current 200 mA to 1.2 A
Signal frequency up to 500 kHz
Low-power standby mode
Internal voltage comparator
Wide voltage range 2.4 V to 12 V
Applications
D
Keyless entry systems
D
Remote control
D
Wireless data communication
Ordering Information
Extended Type Number
U426B-FP
Package
SO8
Remarks
V
Batt
U426B
Controller
DATA
WAKE
MON鈥揙
R
S
MON鈥揑
DRV
I
RED
COMP
95 9947
Figure 1. Block diagram for an IR transmitter
Rev. A2, 15-Oct-98
1 (6)

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