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www.fairchildsemi.com
Block Diagram
Feedback
Circuit
Slew Rate
Control
Refs & Temp
Compensation
Output
Buffer
Buf
RC7315
V
H
+V
SRC
–V
SRC
V
O
V
CCO
V
EEO
TS
V
CC
V
EE
GND
V
IN+
V
IN–
C
VOL
V
L
INH+
INH–
Buf
Offset Control
and
Switching
Driver
Inhibit
Circuit
Temperature
Sensing
RC7315
T hree-S tate AT E Pin Elec tronic s Driver
Features
High output slew rate (1.8 V/ns typical)
Wide output voltage range (-2.5V to +7V), and up to
9.5 Vp-p swings
Three-state/high impedance output
High repetition rate (250 MHz for ECL swings)
Low output offset (20 mV typical) and output offset drift
(0.1 mV/
°
C typical).
Low leakage (10 nA typical) and low output capacitance
(3 pF typical) in high impedance inhibit mode
High speed differential inputs with wide common mode
range for ease of interface to ECL as well as TTL and
CMOS levels
Output short circuit protection (Safe Operating Area
protection with current limiting and thermal shutdown)
100 mA typical dynamic current drive capability
Absolute slew rate control
Available in 28-pin PLCC
Packaged parts available in unterminated configurations
Applications
ATE pin electronics driver
Precision waveform generator
Level translator
Differential line receiver
General purpose driver
Laser driver
CRT preamplifier
Description
The RC7315 Pin Electronics Driver is designed for use in all
high speed ATE systems which require pin drivers with three
state capability and high slew rates. The RC7315 has the
ability to drive a 50
W
transmission line of up to 2 feet in
length with a slew rate of 1.8 V/ns and repetition rate of over
250 MHz for ECL output levels. These features, combined
with a maximum output swing of 9.5 Vp-p over the range of
-2.5V to +7V, provide this circuit with the ability to test
TTL, CMOS, ECL and GaAs devices. The high and low lim-
its of the output swing are set through the program pins V
and V
L
, respectively. The transfer characteristic from the
program pins to the output pin is unity gain with very low
offset drift. The V
H
and V
L
inputs have been buffered to
operate with low bias currents (1
coupling to the output of a DAC.
H
m
A typical) allowing direct
When the RC7315 is used on an I/O pin, it may be forced
into the high impedance state through the INH+ and INH-
differential inputs. In the high impedance state, excellent
isolation is provided between the output of the disabled
driver and the pin by virtue of low driver output capacitance
(3.0 pF typical) and low output leakage (10 nA typical).
The RC7315 is provided with high speed differential ECL
inputs for ease of interface with the differential ECL outputs
of a timing generator. The inputs have a voltage range of -2V
to +6V, so that if required, an input may be driven by TTL or
CMOS devices provided that the other input is fed to the
appropriate threshold value.
The RC7315 is implemented using Fairchild Semiconduc-
tor’s high frequency complementary bipolar process.
Rev. 1.1.0