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DEVICE CONNECTIONS
TB12 - CMOS *Pulsed Pull-up Latched input. When input is connected to
V SS , 8 seconds is added to the total time base period. When input is
connected to V DD or left open, no time is added to the total time base
period.
TB11 - CMOS *Pulsed Pull-up Latched input. Adds 4 seconds to the total
time base period when input is connected to V SS .
TB10 - CMOS *Pulsed Pull-up Latched input. Adds 2 seconds to the total
time base period when input is connected to V SS .
TB9 - CMOS *Pulsed Pull-up Latched input. Adds 1 second to the total time
base period when input is connected to V SS .
TB8 - CMOS *Pulsed Pull-up Latched input. Adds 1/2 second to the total
time base period when input is connected to V SS .
TB7 - CMOS *Pulsed Pull-up Latched input. Adds 1/4 second to the total
time base period when input is connected to V SS .
TB6 - CMOS *Pulsed Pull-up Latched input. Adds 1/8 second to the total
time base period when input is connected to V SS .
TB5 - CMOS *Pulsed Pull-up Latched input. Adds 1/16 second to the total
time base period when input is connected to V SS .
TB4 - CMOS *Pulsed Pull-up Latched input. Adds 1/32 second to the total
time base period when input is connected to V SS .
TB3 - CMOS *Pulsed Pull-up Latched input. Adds 1/64 second to the total
time base period when input is connected to V SS .
TB2 - CMOS *Pulsed Pull-up Latched input. Adds 1/128 second to the total
time base period when input is connected to V SS.
TB1 - CMOS *Pulsed Pull-up Latched input. Adds 1/256 second to the total
time base period when input is connected to V SS.
DPA - CMOS *Pulsed Pull-up Latched input. When used along with DPB,
selects the position of the decimal point.
DPB - CMOS *Pulsed Pull-up Latched input. When used along with DPA,
selects the position of the decimal point.
F.D. - CMOS *Pulsed Pull-up Latched input. When input is connected to V SS ,
Frequency Doubling is disabled. When input is connected to V DD or left
open, Frequency Doubling is enabled.
M.R. - CMOS Internally Pulled-up input. When input is connected to V SS ,
Master Reset will terminate the present time base period. When MR is
allowed to go high, the next time base period will begin. In normal use,
MR is connected to V DD or left open. Note that this is not a Pulsed Pull-
up Latched input.
* See section on “Pulsed Pull-Up Latched Inputs” for more information .
Note: For maximum noise immunity , connect all TB inputs to either V DD or
V SS , whichever is appropriate. Inputs left open may change states in some
noisey environments.
BLOCK DIAGRAM
SIG. - CMOS Schmidt trigger input. Counter chip increments on the falling
edge of the Signal input when F.D. is connected to V SS (disabled). Counter
chip increments on both rising and falling edges of the Signal input when
F.D. is connected to V DD or left open (enabled).
V DD - +2.5 to 6.0 VDC Supply
V SS - Common for D.C. Supply and Inputs.
C
C
CAUTION
This device contains CMOS circuitry which requires special anti-static
handling to the same degree required by standard CMOS integrated circuits.
Units should be stored in the conductive packaging used to ship the devices.
Containers should be opened and units handled only on a conductive table
top by personnel wearing wrist-strap grounding equipment. These devices
have the same protection circuits as standard CMOS devices to prevent
MAXIMUM RATINGS (VOLTAGE REF. TO V SS )
RATING SYMBOL VALUE
DC Supply Voltage V DD -0.5 to +6.5
Input Voltage, All Inputs V I -0.5 to (V DD +0.5)
Operating Temperature * T A -35 to +85
Storage Temperature T STG -35 to +85
UNIT
VDC
VDC
o
o
damage to inputs due to nominal over-voltage.
* Extended high and low temperature ranges available, consult factory.
ELECTRICAL CHARACTERISTICS V DD = 5 V ±10% UNLESS OTHERWISE SPECIFIED
SYMBOL
V DD
I DD
I DDQ
V SIH
V SIL
V IH
V IL
PARAMETER
Supply Voltage
Supply Current
Supply Current
Input High Voltage
Input Low Voltage
Input High Voltage
Input Low Voltage
MIN.
2.5
3.9
TYP.
3.0
0.9
2.2
2.1
MAX.
6.0
55
45
0.5
UNIT
VDC
μA
μA
VDC
VDC
VDC
VDC
TEST CONDITION
10 KHz signal, 1 second time base. All other inputs high.
1 second time base. All other inputs high.
Signal input only.
Signal input only.
All other inputs.
All other inputs.
I SIL
I IH
fc
R PU
T ACC
Input Leakage
Input High Current (source)
Signal Frequency
Pull Up Resistance
Time Base Accuracy
50
0.05
0.01
50
0.1
200
500
μA
μA
K W
%
V DD > V IN > V SS Signal input only.
All other inputs.
KHz
All pull-up inputs.
All time ranges.
2
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相关PDF资料
HWK70000
CABLE ASSEM FOR MDM SERIES
IF-30-56
XFRMR 115/230V 28V 1.1A 30VA PCB
IL-20-0001
IL5 PULSE TRANSFORMER THT 0.25A
ILR-11-0003
ILR3 IMPULSTRAFO KONVENTIONELL
IS-1000
TRANSFORMER ISOLATION 1000W
IS-250
TRANSFORMER ISOLATION 250W
IS-500
TRANSFORMER ISOLATION 500W
IS1000HG
TRANSF ISO 1000W 4OUT HOSP GRADE
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