Datasheet

TFBS4711
www.vishay.com
Vishay Semiconductors
Rev. 3.1, 03-Jul-2018
2
Document Number: 82633
For technical questions within your region: [e-mail]
, [e-mail], [e-mail]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
FUNCTIONAL BLOCK DIAGRAM
PINOUT
TFBS4711
weight 50 mg
Definitions:
In the Vishay transceiver datasheets the following
nomenclature is used for defining the IrDA operating modes:
SIR: 2.4 kbit/s to 115.2 kbit/s, equivalent to the basic serial
infrared standard with the physical layer version IrPhy 1.0
MIR: 576 kbit/s to 1152 kbit/s
FIR: 4 Mbit/s
VFIR: 16 Mbit/s
MIR and FIR were implemented with IrPhy 1.1, followed by
IrPhy 1.2, adding the SIR low power standard.
PRODUCT SUMMARY
PART NUMBER
DATA RATE
(kbit/s)
DIMENSIONS
H x L x W
(mm)
LINK DISTANCE
(m)
OPERATING
VOLTAGE
(V)
IDLE SUPPLY
CURRENT
(mA)
TFBS4711 115.2 1.9 x 3 x 6 0 to ≥ 0.7 2.4 to 5.5 0.07
18282
Controlled driver
Push-pull
driver
GND
TXD
RXD
V
CC2
V
CC1
Amplifier
Comparator
SD
Logic
and
control
REDC
19428
Pin 1
PIN DESCRIPTION
PIN
NUMBER
SYMBOL DESCRIPTION I/O ACTIVE
1
V
CC2
IRED
anode
Connect IRED anode directly to the power supply (V
CC2
). IRED current can be decreased
by adding a resistor in series between the power supply and IRED anode. A separate
unregulated power supply can be used at this pin
2TXD
This Schmitt-Trigger input is used to transmit serial data when SD is low. An on-chip
protection circuit disables the LED driver if the TXD pin is asserted for longer than 100 μs.
The input threshold voltage adapts to and follows the logic voltage swing defined by the
applied supply voltage
IHigh
3RXD
Received data output, push-pull CMOS driver output capable of driving standard CMOS or
TTL loads. During transmission the RXD output is active and mirrors the transmit signal. No
external pull-up or pull-down resistor is required. Floating with a weak pull-up of
500 kΩ (typ.) in shutdown mode. The voltage swing is defined by the applied supply
voltage
OLow
4SD
Shutdown. The input threshold voltage adapts to and follows the logic voltage swing
defined by the applied supply voltage
IHigh
5V
CC1
Supply voltage
6GND Ground