Holt HI-8422 16-channel discrete-to-digital interface Datasheet

HI-8422
16-Channel Discrete-to-Digital Interface
Sensing 28 Volt / Open and Open / Ground Signals
August 2010
DESCRIPTION
FEATURES
The HI-8422 is a sixteen channel discrete-to-digital
interface device. The device has eight channels designed
to sense 28 V / Open signals and eight channels that sense
Open / Ground signals. Data is multiplexed from each bank
of sensors to an eight bit digital databus. Mixed-signal
CMOS technology is used to provide superior low-power
performance. The device outputs are CMOS / TTL
compatible and may be disabled (tri-state) using the CE
and OE pins.
!
8 independent 28 Volt / Open sensing channels
!
8 independent Open / Ground sensing channels
!
5.0 V single supply operation
!
Low power CMOS technology
!
Industrial and Extended temperature ranges
The HI-8422 is offered in a small footprint 32-pin Plastic
Quad Flat Package (PQFP). Please contact the Holt sales
department for other packaging options.
1
X
1
0
0
0
X
Open
0
0
0
0
28VIN5 - 5
1
0VIN5 - 6
Ground
0
0
0
26 - D1
25 - D2
28 - N/C
27 - GND
23 - D3
28VIN4 - 3
28 Volts
X
30 - 0VIN1
24 - N/C
0VIN3 - 2
X
X
1
X
High Z
X
X
X
X
1
High Z
21 - 0VIN8
20 - 28VIN8
19 - D4
28VIN6 - 7
18 - D5
0VIN6 - 8
17 - D6
28VIN7 - 9
X
22 - N/C
HI-8422PQI
&
HI-8422PQT
0VIN4 - 4
D8 - 15
0
28VIN3 - 1
D7 - 16
0
Output
A0 - 13
1
OE
VDD - 14
X
CE
CE - 12
Open
A0
OE - 11
0V
Inputs
0VIN7 - 10
28V
Inputs
29 - 28VIN1
32 - 0VIN2
FUNCTION TABLE
31 - 28VIN2
PIN CONFIGURATION
32 Pin PQFP package
(DS8422 Rev. G)
HOLT INTEGRATED CIRCUITS
www.holtic.com
08/10
HI-8422
PIN DESCRIPTIONS
PIN
SYMBOL
FUNCTION
DESCRIPTION
1
28VIN3
Discrete Input
28 Volt / Open sensing input, channel 3
2
0VIN3
Discrete Input
Open / Ground sensing input, channel 3
3
28VIN4
Discrete Input
28 Volt / Open sensing input, channel 4
4
0VIN4
Discrete Input
Open / Ground sensing input, channel 4
5
28VIN5
Discrete Input
28 Volt / Open sensing input, channel 5
6
0VIN5
Discrete Input
Open / Ground sensing input, channel 5
7
28VIN6
Discrete input
28 Volt / Open sensing input, channel 6
8
0VIN6
Discrete Input
Open / Ground sensing input, channel 6
9
28VIN7
Discrete Input
28 Volt / Open sensing input, channel 7
10
0VIN7
Discrete Input
Open / Ground sensing input, channel 7
11
OE
Digital input
Output Enable. D1-D8 are high-impedance if OE is high
12
CE
Digital input
Chip Enable. D1-D8 are high-impedance if CE is high
13
A0
Digital input
14
VDD
Power
15
D8
Tri-state output
Logic output, channel 8
16
D7
Tri-state output
Logic output, channel 7
17
D6
Tri-state output
Logic output, channel 6
18
D5
Tri-state output
Logic output, channel 5
19
D4
Tri-state output
Logic output, channel 4
20
28VIN8
Discrete Input
28 Volt / Open sensing input, channel 8
21
0VIN8
Discrete Input
Open / Ground sensing input, channel 8
22
N/C
23
D3
Tri-state output
Logic output, channel 3
24
N/C
25
D2
Tri-state output
Logic output, channel 2
26
D1
Tri-state output
Logic output, channel 1
27
GND
Power
28
N/C
29
28VIN1
Discrete Input
28 Volt / Open sensing input, channel 1
30
0VIN1
Discrete Input
Open / Ground sensing input, channel 1
31
28VIN2
Discrete Input
28 Volt / Open sensing input, channel 2
32
0VIN2
Discrete Input
Open / Ground sensing input, channel 2
When A0 is high D1 - D8 outputs data from 28V comparators
When A0 is low D1 - D8 show results from 0V comparators
Positive supply voltage 5.0 V
Not connected
Not connected
Ground
Not connected
HOLT INTEGRATED CIRCUITS
2
HI-8422
BLOCK DIAGRAM
VDD
OE
CE
3.6V Reference
+
66 K
-
28VIN1
29 K
+
66 K
28VIN2
29 K
+
66 K
28VIN3
29 K
+
66 K
28VIN4
29 K
+
66 K
28VIN5
D1
29 K
+
66 K
D2
-
28VIN6
29 K
D3
+
66 K
28VIN7
29 K
D4
+
66 K
-
28VIN8
29 K
8 x 2:1
MUX
D5
VDD
5K
9K
D6
+
0VIN1
5K
9K
D7
+
0VIN2
5K
9K
D8
+
0VIN3
5K
9K
+
0VIN4
5K
9K
+
0VIN5
5K
9K
+
0VIN6
5K
9K
+
0VIN7
5K
9K
+
0VIN8
GND
9K
5K
3.25V Reference
A0
HOLT INTEGRATED CIRCUITS
3
HI-8422
RECOMMENDED OPERATING CONDITIONS
ABSOLUTE MAXIMUM RATINGS
Supply voltage (VDD)
Logic input voltage range
Discrete input voltage range:
28V / Open Sensing
Open / Ground Sensing
Power dissipation at 25°C
Solder Temperature
Storage Temperature
-0.3 V to +7 V
-0.3 V to +5.5 V
-80 V to + 80 V
-80 V to + 80 V
350 mW
275°C for 10 sec
-65°C to +150°C
Supply Voltage
VDD .................................. 4.5 V to 5.5 V
Operating Temperature Range
Industrial Screening .........
-40°C to +85°C
Hi-Temp Screening ........
-55°C to +125°C
NOTE: Stresses above absolute maximum ratings or outside recommended operating conditions may cause
permanent damage to the device. These are stress ratings only. Operation at the limits is not recommended.
DC ELECTRICAL CHARACTERISTICS
VDD = 5.0V ± 10%, GND = 0V, TA = Operating Temperature Range (unless otherwise specified).
PARAMETER
SYMBOL
CONDITION
MIN
Open state input voltage
VSO
Input voltage to give high output
-5
28 V state input voltage
VS28
Input voltage to give low output
14
Open state input current
ISO
Maximum input current
to give high output
28 V state input current
IS28
Minimum input current
to give low output
197
Input resistance
RIN
0 V < VIN < 16 V
71
Input current at 28 V
IIN28
VIN = 28 V
Ground state input voltage
VSG
Input voltage to give high output
Open state input voltage
VSO
Input voltage to give low output
3.5
Ground state input resistor
RIG
0
Open state input resistor
RIO
Resistor from input to ground
to give high output
Resistor from input to ground
to give low output
Input source current
IIO
TYP
MAX
UNITS
10
V
28 V / OPEN DISCRETE INPUTS
V
84
µA
µA
119
KW
394
µA
3.0
V
100
W
OPEN / GROUND DISCRETE INPUTS
Current sourced into 100W
V
KW
100
-100
-330
µA
to ground
Reverse leakage current
IIR
VIN = 35 V, VDD = 0 V
5.0
mA
LOGIC INPUTS (CE, OE)
Input Voltage
Input current
Input voltage HI
VIH
Input voltage LO
VIL
2.0
V
Input sink
IIH
VIH = VDD
Input source
IIL
VIL = 0 V
-1.0
µA
VOH
IOH = -5 mA
2.4
V
0.8
V
1.0
µA
OUTPUTS
Logic output voltage
High
Low
VOL
IOL = 5 mA
Logic output voltage (CMOS)
High
VOH
IOH = -100 uA
Low
VOL
IOL = 100 uA
0.2
V
IOZ
VOUT = 0 V or VDD
±10
µA
20
mA
Tri-state output current
0.4
VDD - 0.2
V
V
SUPPLY CURRENT
VDD current
IDD
VIN = 0 V (28V inputs)
VIN = VDD (other inputs)
HOLT INTEGRATED CIRCUITS
4
10
HI-8422
AC ELECTRICAL CHARACTERISTICS
VDD = 5.0V ± 10%, GND = 0V, TA = Operating Temperature Range (unless otherwise specified).
PARAMETER
SYMBOL
CONDITION
MIN
TYP
MAX
UNITS
500
ns
SWITCHING CHARACTERISTICS
Propagation delay
IN to OUT
tLH, tHL
Output enable time
tZL, tZH
From CE or OE
25
ns
Output disable time
tLZ, tHZ
From CE or OE
25
ns
A0 Set-up time
A0 Hold time
tSU
0
ns
tHOLD
0
ns
TIMING DIAGRAMS
A0
INx
tSU
tHOLD
tLH
tHL
Dx
CE or OE
tZL, tZH
tZL, tZH
Dx
Output Enable Timing
Input to Output Propagation Delay
INPUT SWITCHING THRESHOLD
The input switching threshold of the Open / Ground inputs
will decrease with increasing series resistance according to
the function
VT = 3.25 - 0.1R
where VT is the nominal input switching threshold, and R
is the value of the external series resistor in Kohms.
ORDERING INFORMATION
HI - 8422PQ x x
PART
NUMBER
Blank
F
PART
NUMBER
LEAD
FINISH
Tin / Lead (Sn / Pb) Solder
100% Matte Tin (Pb-free, RoHS compliant)
TEMPERATURE
RANGE
FLOW
BURN
IN
I
-40°C TO +85°C
I
NO
T
-55°C TO +125°C
T
NO
PART
NUMBER
8422PQ
PACKAGE
DESCRIPTION
32 PIN PLASTIC QUAD FLATPACK PQFP (32PTQS)
HOLT INTEGRATED CIRCUITS
5
HI-8422
REVISION HISTORY
P/N
DS4422
Rev
Date
G
08/04/10
Description of Change
Removed reference to lightning protected inputs throughout datasheet, changed discrete
input voltage range and clarified temperature ranges in Features.
HOLT INTEGRATED CIRCUITS
6
PACKAGE DIMENSIONS
32 PIN PLASTIC QUAD FLAT PACK (PQFP)
inches (millimeters)
Package Type: 32PTQS
.0057 ± .002
(0.145 ± .06)
.354 BSC SQ
(9.00)
.0315
BSC
(0.80)
.276 BSC SQ
(7.00)
.015 ± .003
(0.375 ± .075)
.024 ± .006
(0.60 ± .15)
.055 ± .002
(1.4 ± .05)
.006 ± .002
(0.14 ± .06) R
See Detail A
0° £ Q £ 7°
.063
max
(1.60)
.004 ± .002
(0.10 ± .05)
BSC = “Basic Spacing between Centers”
is theoretical true position dimension and
has no tolerance. (JEDEC Standard 95)
HOLT INTEGRATED CIRCUITS
7
.003
R min
(.08)
Detail A
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