TFDU6102 Datasheet, PDF (3/16 Pages) Vishay Siliconix – Fast Infrared Transceiver Module (FIR, 4 Mbit/s) for 2.7 V to 5.5 V Operation

VISHAY
TFDU6102
Vishay Semiconductors
Pin Description
Pin Number Function
Description
I/O
"U"
1
V_CC2
Connect IRED anode directly to V_CC2. For voltages higher than 3.6 V an
IRED Anode external resistor might be necessary for reducing the internal power
dissipation.
An unregulated separate power supply can be used at this pin.
2
IRED
Cathode
IRED cathode, internally connected to driver transistor
3
Txd
This input is used to transmit serial data when SD is low. An on-chip
I
protection circuit disables the LED driver if the Txd pin is asserted for longer
than 80 µs. When used in conjunction with the SD pin, this pin is also used
to receiver speed mode.
4
Rxd
Received Data Output, push-pull CMOS driver output capable of driving a
O
standard CMOS or TTL load. 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, also used for dynamic mode switching. Setting this pin active
I
places the module into shutdown mode. On the falling edge of this signal,
the state of the Txd pin is sampled and used to set receiver low bandwidth
(Txd = Low, SIR) or high bandwidth
(Txd = High, MIR and FIR) mode. Will be overwritten by the mode pin input,
which must float, when dynamic programming is used.
6
V_CC1
Supply Voltage
7
Mode
HIGH: High speed mode, MIR and FIR; LOW: Low speed mode, SIR only
I
(see chapter "Mode Switching"). Must float, when dynamic programming is
used.
Mode
The mode pin can also be used to indicate the dynamically programmed
O
mode. The maximum load is limited to 50 pF. High indicates FIR/MIR-, low
indicates SIR-mode
8
GND
Ground
Active
HIGH
LOW
HIGH
Document Number 82550
Rev. 1.5, 24-Jun-04
www.vishay.com
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