TFDU4101 Datasheet, PDF (2/16 Pages) Vishay Siliconix – Infrared Transceiver Module (SIR, 115.2 kbit/s) for IrDA Applications

TFDU4101
Vishay Semiconductors
Functional Block Diagram
Vcc1
Amplifier
Comparator
Tri-State
Driver
RXD
18468
SD
TXD
Logic
&
Control
GND
Vcc2
Controlled
Driver
IRED C
Pin Description
Pin Number Function
Description
I/O
"U"
1
V_CC2
IRED anode to be externally connected to V_CC2. An external resistor is only
IRED Anode ^{necessary for controlling the IRED current when a current reduction below}
300 mA is intended to operate in IrDA low power mode.
This pin is allowed to be supplied from an uncontrolled power supply
separated from the controlled V_CC1 - supply.
2
IRED
IRED cathode, internally connected to driver transistor
Cathode
3
TXD
This Schmitt-Trigger input is used to transmit serial data when SD is low. An
I
on-chip protection circuit disables the LED driver if the TXD pin is asserted
for longer than 50 µs (max 300 µs).
4
RXD
Received Data Output, push-pull CMOS driver output capable of driving
O
standard CMOS or TTL loads. During transmission the RXD output is
inactive. No external pull-up or pull-down resistor is required. Floating with
a weak pull-up of 500 kΩ (typ.) in shutdown mode.
5
SD
Shutdown
I
6
V_CC1
Supply Voltage
7
NC
No internal connection
I
8
GND
Ground
Pinout
TFDU4101
weight 200 mg
"U" Option BabyFace
(Universal)
IRED
Detector
Active
HIGH
LOW
HIGH
17087
1 2 34 5 6 7 8
www.vishay.com
172
Document Number 81288
Rev. 1.0, 11-Jul-06