tfdu7100 Vishay, tfdu7100 Datasheet - Page 2

• Manufacturer Part Number: tfdu7100
• Description: Infrared Transceiver Module Fir, 4 Mbit/s For Irda Combined With Remote Control Receiver 36 Khz To 38 Khz Carrier
• Manufacturer: Vishay

TFDU7100
Vishay Semiconductors
Functional Block Diagram
Pin Description
www.vishay.com
2
Pin Number
1
2
3
4
5
6
7
8
IRED Cathode
IRED Anode
Function
RC-RXD
V
V
GND
RXD
TXD
SD
CC2
CC1
19597
TXD
SD
(echo-on). No external pull-up or pull-down resistor is required. Floating with
This Schmitt-Trigger input is used to transmit serial data when SD is low. An
standard CMOS or TTL loads. During transmission the RXD output is active
IRED anode to be externally connected to V
on-chip protection circuit disables the IRED driver if the TXD pin is asserted
Open Collector Output. This output is active during transmission (echo-on).
necessary for controlling the IRED current when a current reduction below
Received Data Output, push-pull CMOS driver output capable of driving
This pin is allowed to be supplied from an uncontrolled power supply
Amplifier
Amplifier
IRED Cathode, internally connected to the driver transistor
Figure 1. Functional Block Diagram
a weak pull-up of 500 k: (typ.) in shutdown mode.
External pull-up resistor to be added (e.g. 10 k:).
V
separated from the controlled V
CC1
Shutdown for IRDA channel only
Comparator
Envelope
Generator
Logic
&
Control
for longer than 80 Ps.
300 mA is intended.
Supply Voltage
Description
GND
Ground
Controlled Driver
CC2
Open Collector
Push-Pull
Driver
. An external resistor is only
CC1
RC-RXD
- supply
Output
RXD
V
CC2
Document Number 84773
Rev. 1.1, 27-Sep-06
I/O
O
O
I
I
Active
HIGH
HIGH
LOW
LOW