National Instruments AT-MIO-16X - Manual (Page 62)

Chapter 2 Configuration and Installation
AT-MIO-16X User Manual 2-40 © National Instruments Corporation
The signals for Counters 1, 2, and 5, and the FOUT output signal are
directly tied from the Am9513A input and output pins to the I/O
connector. In addition, the GATE, SOURCE, and OUT1 pins are pulled
up to +5 V through a 4.7-k
Ω
resistor. The input and output ratings and
timing specifications for the Am9513A signals are given as follows:
Absolute maximum voltage input rating –0.5 V to +7.0 V with
respect to DIG GND
Am9513A digital input specifications (referenced to DIG GND):
V
IH
input logic high voltage 2.2 V minimum
V
IL
input logic low voltage 0.8 V maximum
Input load current ±10
µ
A maximum
Am9513A digital output specifications (referenced to DIG GND):
V
OH
output logic high voltage 2.4 V minimum
V
OL
output logic low voltage 0.4 V maximum
I
OH
output source current, at V
OH
200
µ
A maximum
I
OL
output sink current, at V
OL
3.2 mA maximum
Output current, high-impedance state ±25
µ
A maximum
Figure 2-19 shows the timing requirements for the GATE and SOURCE
input signals and the timing specifications for the OUT output signals
of the Am9513A.