hi-8422 Holt Integrated Circuits, Inc., hi-8422 Datasheet - Page 5

• Manufacturer Part Number: hi-8422
• Description: 16-channel Discrete-to-digital Interface
• Manufacturer: Holt Integrated Circuits, Inc.

AC ELECTRICAL CHARACTERISTICS
ORDERING INFORMATION
VDD = 5.0V
LIGHTNING PROTECTION
The HI-8422’s 28V / Open Sensing inputs will survive light-
ning testing to DO-160D, Level 3 waveforms 3, 4 and 5A
without external components. The Open / Ground inputs will
survive waveforms 3 and 4 without external components. In
order to guarantee survival to waveform 5A an external se-
ries resistor of at least 3.3K is recommended.
TIMING DIAGRAMS
SWITCHING CHARACTERISTICS
CE
Propagation delay
Output enable time
Output disable time
A0 Set-up time
A0 Hold time
HI - 8422PQ x x
or
OE
A0
Dx
± 10%
PARAMETER
t , t
ZL ZH
, GND = 0V, T = Operating Temperature Range (unless otherwise specified).
Output Enable Timing
t
SU
W
A
IN to OUT
PART
NUMBER
PART
NUMBER
PART
NUMBER
HOLT INTEGRATED CIRCUITS
SYMBOL
8422PQ
Blank
t , t
t , t
t , t
LH
ZL
LZ
t
HOLD
t
t , t
F
T
I
SU
ZL ZH
ZH
HL
HZ
t
HOLD
HI-8422
32 PIN PLASTIC QUAD FLATPACK PQFP (32PTQS)
LEAD
FINISH
100% Matte Tin (Pb-free, RoHS compliant)
TEMPERATURE
RANGE
PACKAGE
DESCRIPTION
Tin / Lead (Sn / Pb) Solder
-55°C TO +125°C
-40°C TO +85°C
5
INPUT SWITCHING THRESHOLD
The input switching threshold of the Open / Ground inputs
will decrease with increasing series resistance according to
the function
where V is the nominal input switching threshold, and R is
the value of the external series resistor in Kohms.
From
From
CONDITION
INx
Dx
CE
CE
T
or
or
Input to Output Propagation Delay
OE
OE
t
HL
FLOW
T
I
V = 3.25 - 0.1R
T
MIN
0
0
BURN
NO
NO
IN
TYP
MAX
t
LH
500
25
25
UNITS
ns
ns
ns
ns
ns