PIN FUNCTION TABLE
Pin
DIN
IOUT
STRETCH
Differential data inputs.
Differential open collector outputs.
Control input to select the amount of duty cycle pre-distortion. When the pin is left open, no pre-distortion is introduced.
If the pin is connected to VCC, the output LOW state current pulse width is increased by 155ps. When it is connected to
VEE, the current pulse width is increased by 310ps.
Resistor to set LED drive current. This resistor sets the tail current of the output current switch and should be connected
to the VEE plane. Since the RSET voltage compensation circuit is referenced to VEE, the RSET voltage will track 1:1 with
VEE changes, thus the voltage across the RSET resistor will remain constant.
Terminals for positive temperature tracking resistor. This resistor controls the temperature tracking rate of the voltage at
the RSET pin, which in turn sets the LED drive current tracking. If the two pins are shorted together, the nominal tracking
rate is 1.4mV/°C and when a 2kΩ resistor is connected across the pins, the nominal tracking rate is 4.9mV/°C.
Most positive power supply input. +5V for PECL operation or ground for standard ECL operation.
Most negative power supply input. Ground for PECL operation or –5.2V for standard ECL operation.
Reference voltage for use in single ended applications or when the input signal is AC coupled into the device.
Function
RSET
RTCO1, RTCO2
VCC
VEE
VBB
+5.0V
SUPPLY
DECOUPLING
CAPACITORS
10Ω
10Ω
16
VEE
15
Stretch
14
VEE
13
IOUT
12
RSET
11
IOUT
10
VCC
9
VEE
VEE
1
VCC
2
VBB
3
DIN
4
DIN
5
RTCO1
6
RTCO2
7
VEE
8
PECL
BIAS
50Ω
IN
IN
50Ω
1kΩ
PECL
BIAS
Figure 1. Typical +5V Applications Circuit
MOTOROLA
2
High Performance Frequency
Control Products — BR1334
MOTOROLA [ MOTOROLA, INC ]
