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PIN DESCRIPTIONS
(All inputs are Schmidt trigger inputs)
MODE SELECT INPUTS CHART
V DD : +5 VDC power
V SS : GND or common supply terminal
DP1 & DP2 : Counters - See Decimal Point Configuration Chart
Timers - Tie low
MS1-MS4 : See Mode Select Inputs Chart
RST : Active low, will reset the display to zero
LATCH : Counters - A HIGH level will freeze the display, a LOW level will
allow the counter to update the display normally
Timers - Tie low
CNT : Counters - This is the count input (edge trigger determined by mode)
Timers - This is the run input (active low = timer runs)
DECIMAL POINT CONFIGURATION CHART
MODE
0
1
2
3
4
5
6
7
8
9
10
MS4
0
0
0
0
0
0
0
0
1
1
1
MS3
0
0
0
0
1
1
1
1
0
0
0
MS2
0
0
1
1
0
0
1
1
0
0
1
MS1
0
1
0
1
0
1
0
1
0
1
0
MODE OF OPERATION
0.001 Second Timer
0.01 Second Timer
0.1 Second Timer
1 Second Timer
0.1 Minute Timer
1 Minute Timer
0.01 Hour Timer
0.1 Hour Timer
1 Hour Timer
DO NOT USE
Negative Edge Counter
DP2
0
0
1
1
DP1
0
1
0
1
DISPLAY
0
0.0
0.00
0.000
11
12
13
14
15
1
1
1
1
1
0
1
1
1
1
1
0
0
1
1
1
0
1
0
1
Positive Edge Counter
DO NOT USE
DO NOT USE
DO NOT USE
DO NOT USE
TYPICAL APPLICATIONS
COUNTER - TTL signal input counting. Positive edge
incrementing (leading edge).
1 MINUTE TIMER - With Leading Zero Blanking
enabled. Time starts with the switch closed. Time
stops and holds the display with the switch open.
GND
+5 V
GND
+5 V
V SS (GND)
CNT
NO CONNECTION
NO CONNECTION
NO CONNECTION
LATCH
RST
MS1
TTL SIGNAL
.0022 μf
220K
V SS (GND)
CNT
NO CONNECTION
NO CONNECTION
NO CONNECTION
LATCH
RST
TIMER
RUN
.0022 μ f
220K
220K
MS2
MS3
MS4
NO CONNECTION
DP2
DP1
V DD
RST
MS1
MS2
MS3
MS4
DP2
DP1
V DD
RST
ORDERING INFORMATION
ACCESSORY: MDM CABLE ASSEMBLY - HWK70000
COLOR CODED RIBBON CABLE
STRIPPED AND TINNED
0.100 (2.54), TYP.
0.100 (2.54), TYP.
CIRCUIT #1; BROWN
0.15 (3.8)
MODEL NO
MDMU
HWK7
DESCRIPTION
Panel Mount W/Reflective Display
Panel Mount W/Yel-Grn Backlighting
Panel Mount W/Red Backlighting
PC Board Mount W/Reflective Display
PC Board Mount W/Yel-Grn Backlighting
PC Board Mount W/Red Backlighting
MDM Cable Assembly
PART NUMBER
MDMU0000
MDMU0010
MDMU0020
MDMU0100
MDMU0110
MDMU0120
HWK70000
12 (305)
3
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相关代理商/技术参数
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