in digital closed loop motion
control systems and digital data
input systems. It does this by
shifting time intensive quadrature
decoder functions to a cost
effective hardware solution. The
entire HCTL-20XX family con-
sists of a 4x quadrature decoder,
a binary up/down state counter,
and an 8-bit bus interface. The
use of Schmitt-triggered CMOS
inputs and input noise filters
allows reliable operation in noisy
environments. The HCTL-2000
contains a 12-bit counter. The
HCTL-2016 and 2020 contain a
16-bit counter. The HCTL-2020
also contains quadrature decoder
output signals and cascade
signals for use with many
standard counter ICs. The HCTL-
20XX family provides LSTTL
compatible tri-state output
buffers. Operation is specified for
a temperature range from -40 to
+85°C at clock frequencies up to
14 MHz.
MOTION SENSING
AND CONTROL
25.91
±
0.25
(1.02
±
0.010)
Package Dimensions
19.05
±
0.25
(0.750
±
0.010)
15
°
1.52
±
0.13
(0.060
±
0.005)
9.40 (0.370)
15
°
Operating Characteristics
Table 1. Absolute Maximum Ratings
(All voltages below are referenced to V
SS
)
Parameter
DC Supply Voltage
Input Voltage
Storage Temperature
Operating Temperature
Symbol
V
DD
V
IN
T
S
T
A[1]
Limits
-0.3 to +5.5
-0.3 to V
DD
+0.3
-40 to +125
-40 to +85
Units
V
V
°C
°C
Table 2. Recommended Operating Conditions
Parameter
DC Supply Voltage
Ambient Temperature
Symbol
V
DD
T
A[1]
Limits
+4.5 to +5.5
-40 to +85
Units
V
°C
2-179
AGILENT [ AGILENT TECHNOLOGIES, LTD. ]
