RPM971-H14E3A Rohm Semiconductor, RPM971-H14E3A Datasheet - Page 4

• Manufacturer Part Number: RPM971-H14E3A
• Description: Fiber Optic Transmitters, Receivers, Transceivers IRDA IR COMM SIDE VIEW W/SHIELD
• Manufacturer: Rohm Semiconductor

Specifications of RPM971-H14E3A

• Product: Transceiver
• Data Rate: 4 Mbps
• Wavelength: 870 nm
• Maximum Rise Time: 20 ns
• Maximum Fall Time: 20 ns
• Pulse Width Distortion: 2.3 us
• Operating Supply Voltage: 2.4 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Idle Current, Typ @ 25° C: 1mA
• Link Range, Low Power: 20cm, 60cm
• Operating Temperature: -25°C ~ 85°C
• Orientation: Side View
• Shutdown: *
• Size: 8mm x 2.9mm x 2.2mm
• Standards: IrPHY 1.4
• Supply Voltage: 2.4 V ~ 3.6 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Photo Link Module
PWDOWN
Timing chart
(a) FIR Mode
1. Mode Setting (SIR / MIR / FIR)
2. Timing chart (use example)
(a) Emitting
/ Mode
Mode
TXD
With RPM971-H14 there is a need for mode switch according to communication rate. For the mode setting, there
are “PWDOWN/Mode” and “TXD”. Please see below diagram for the set up of mode.
When a pulse is inputted to TXD terminal, LED is emitting, and a signal is transmitted.
But, when “H” condition follows TXD terminal, LED turns off the lights in the range of TLEDmax.
LED emitting
TXD
PWDOWN
ts 200ns
= >
less than TLEDmax
ts 200ns
= >
tdmax=200µs
FIR Mode
(4Mbps)
more than TLEDmax
TLEDmax
Fig. 1
PWDOWN
(b) SIR / MIR Mode
/ Mode
Mode
TXD
ts 200ns
= >
ts 200ns
= >
tdmax=200µs
RPM971-H14
SIR / MIR Mode
(9.6k-1.152Mbps)
4/8