ZHX3403MA012THTR Zilog, ZHX3403MA012THTR Datasheet - Page 12

• Manufacturer Part Number: ZHX3403MA012THTR
• Description: Fiber Optic Transmitters, Receivers, Transceivers
• Manufacturer: Zilog

Specifications of ZHX3403MA012THTR

• Product: Transceiver
• Data Rate: 115.2 Kbps
• Wavelength: 870 nm
• Maximum Rise Time: 600 ns, 50 ns
• Maximum Fall Time: 600 ns, 50 ns
• Pulse Width Distortion: 1.39 us, 1 us
• Operating Supply Voltage: 2.4 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 30 C
• Package / Case: UltraSlim
• Idle Current, Typ @ 25° C: 0.1µA
• Link Range, Low Power: 30cm
• Operating Temperature: -30°C ~ 85°C
• Orientation: Side View
• Shutdown: *
• Size: 7.3mm x 2.8mm x 1.9mm
• Standards: IrPHY 1.3
• 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

Shutdown and Bandwidth Change
PS011606-0303
Note:
Simple power management and bandwidth switching are available by using a
method similar to the “Legacy Mode” found in many FIR transceivers. Assertion of
the SD pin high places the module into shutdown mode whereby current con-
sumption is reduced to 100 nA (typical). On the falling edge of this signal, the state
of the TX pin is sampled and used to set receiver low bandwidth (TX=Low) or high
bandwidth (TX=High) mode.
The ZHX3403 powers up on with the upper limit of the receiver bandwidth set to
115.2 Kbits/s operation. To set the bandwidth for operation at 1.15 Mbits/s, apply
timings as shown in Table 7 and Figure 4 to the SD and the TX inputs.
It is recommended that the SD pin be connected to GND if the bandwidth adjust-
ment and shutdown modes are not required.
Table 7. Shutdown and Bandwidth Control Timing
Figure 4. Shutdown and Bandwidth Control Timing
Symbol
T1
T2
Tpd
The internal LED driver is disabled when SD is active and is not
enabled until the next rising edge of TX. This ensures that the
LED is not active during bandwidth adjustment.
Conditions
TXD to SD low setup time
SD low to TXD hold time
SD high to power down
P
R
E
L
I
M
I
N
A
MIR UltraSlim Transceiver (IrMC)
Minimum
50
50
200
R
Y
ns
Unit
ns
µs
8