74HCT123D NXP Semiconductors, 74HCT123D Datasheet - Page 13

• Manufacturer Part Number: 74HCT123D
• Description: IC, MONO MULTIVIBRATOR, 30NS, SOIC-16
• Manufacturer: NXP Semiconductors

Specifications of 74HCT123D

• Multivibrator Type: Retriggerable Monostable
• Output Current: 4mA
• Logic Case Style: SOIC
• No. Of Pins: 16
• Supply Voltage Range: 4.5V To 5.5V
• Propagation Delay: 30ns
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Philips Semiconductors
Table 8.
Voltages are referenced to GND (ground = 0 V); C
For test circuit see
[1]
[2]
[3]
74HC_HCT123_4
Product data sheet
Symbol
T
t
t
t
PHL
THL
W
amb
, t
, t
For other R
t
t
R
C
K = constant = 0.45 for V
The inherent test jig and pin capacitance at pins 15 and 7 (nREXT/CEXT) is approximately 7 pF.
The time to retrigger the monostable multivibrator depends on the values of R
extended when the time between the active-going edges of the trigger input pulses meets the minimum retrigger time. If C
the next formula (at V
t
t
C
R
The inherent test jig and pin capacitance at pins 15 and 7 (nREXT/CEXT) is 7 pF.
When the device is powered-up, initiate the device via a reset pulse, when C
W
W
rt
rt
= 40 C to +125 C
EXT
EXT
EXT
EXT
TLH
PLH
= 30 + 0.19
= retrigger time in ns;
= K
= typical output pulse width in ns;
= external resistor in k ;
= external capacitor in pF;
= external capacitor in pF;
= external resistor in k .
Dynamic characteristics 74HC123
Parameter
propagation delay
output transition time
pulse width
R
EXT
nRD, nA, nB to nQ or nQ
nRD (reset) to nQ or nQ
nA LOW
nB HIGH
nRD LOW
EXT
and C
C
Figure
R
EXT
EXT
, where:
EXT
CC
C
12.
= 5.0 V) for the setup time of a retrigger pulse is valid:
CC
combinations see
EXT
= 5.0 V and 0.55 for V
0.9
+ 13
R
EXT
Figure
1.05
Conditions
C
see
see
see
see
, where:
EXT
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
…continued
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
7. If C
Figure 9
Figure 10
Figure 10
Figure 11
L
= 0 pF; R
Rev. 04 — 16 June 2006
= 50 pF unless otherwise specified.
= 2.0 V.
= 2.0 V
= 4.5 V
= 6.0 V
= 2.0 V
= 4.5 V
= 6.0 V
= 2.0 V
= 4.5 V
= 6.0 V
= 2.0 V
= 4.5 V
= 6.0 V
= 2.0 V
= 4.5 V
= 6.0 V
= 2.0 V
= 4.5 V
= 6.0 V
EXT
> 10 nF, the next formula is valid.
Dual retriggerable monostable multivibrator with reset
EXT
= 5 k ; see
EXT
EXT
< 50 pF.
74HC123; 74HCT123
Figure 9
and C
EXT
. The output pulse width will only be
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Min
-
-
-
-
-
-
-
-
-
150
30
26
150
30
26
150
30
26
Typ
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Max
385
77
65
325
65
55
110
22
19
-
-
-
-
-
-
-
-
-
EXT
>10 pF,
13 of 28
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns