Document
74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
Rev. 3.1 — 3 September 2020
Product data sheet
1. General description
The 74HC123-Q100; 74HCT123-Q100 is a dual retriggerable monostable multivibrator with reset. The basic output pulse width is programmed by selection of external components (REXT and CEXT). Once triggered this basic pulse width may be extended by retriggering either of the edge triggered inputs (nA or nB). By repeating this process, the output pulse period (nQ = HIGH, nQ = LOW) can be made as long as desired. Alternatively, an output delay can be terminated at any time by a LOW-going edge on input nRD. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.
Schmitt-trigger action in the nA and nB inputs, makes the circuit highly tolerant to slower input rise and fall times.
This product has been qualified to the Automotive Electronics Council (AEC) standard Q100 (Grade 1) and is suitable for use in automotive applications.
2. Features and benefits
• Automotive product qualification in accordance with AEC-Q100 (Grade 1) • Specified from -40 °C to +85 °C and from -40 °C to +125 °C
• Wide supply voltage range from 2.0 V to 6.0 V • CMOS low power dissipation • High noise immunity • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B • Complies with JEDEC standards:
• JESD8C (2.7 V to 3.6 V) • JESD7A (2.0 V to 6.0 V) • Input levels: • For 74HC123-Q100: CMOS level • For 74HCT123-Q100: TTL level • DC triggered from active HIGH or active LOW inputs • Retriggerable for very long pulses up to 100 % duty factor • Direct reset terminates output pulse • Schmitt-trigger action on all inputs except for the reset input • ESD protection: • MIL-STD-883, method 3015 exceeds 2000 V • HBM JESD22-A114F exceeds 2000 V • MM JESD22-A115-A exceeds 200 V (C = 200 pF, R = 0 Ω) • Multiple package options • DHVQFN package with Side-Wettable Flanks enabling Automatic Optical Inspection (AOI) of solder joints
Nexperia
74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
3. Ordering information
Table 1. Ordering information
Type number
Package
Temperature range Name
74HC123D-Q100
-40 °C to +125 °C SO16
74HCT123D-Q100
74HC123PW-Q100 -40 °C to +125 °C TSSOP16
74HCT123PW-Q100
74HC123BQ-Q100
-40 °C to +125 °C DHVQFN16
Description
plastic small outline package; 16 leads; body width 3.9 mm
plastic thin shrink small outline package; 16 leads; body width 4.4 mm
plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads; 16 terminals; body 2.5 × 3.5 × 0.85 mm
Version SOT109-1
SOT403-1
SOT763-1
4. Functional diagram
1A 1 1B 2 1RD 3
2A 9 2B 10 2RD 11
Fig. 1. Functional diagram
S Q
T Q
RD
S Q
T Q
RD
14 1CEXT 15 1REXT/CEXT 13 1Q
4 1Q
6 2CEXT 7 2REXT/CEXT 5 2Q
12 2Q
001aaa610
74HC_HCT123_Q100
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3.1 — 3 September 2020
© Nexperia B.V. 2020. All rights reserved
2 / 20
Nexperia
1 1A 9 2A 2 1B 10 2B 3 1RD 11 2RD
Fig. 2. Logic symbol
1CEXT 14 2CEXT 6
1REXT/CEXT 15 2REXT/CEXT 7
S Q
T
Q RD
1Q 13 2Q 5
1Q 4 2Q 12
mna515
74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
14
CX
15
RCX
13
1 &
2
4
3
R
6
CX
7
RCX
5
9 &
10
12
11
R
mna516
Fig. 3. IEC logic symbol
nREXT/CEXT VCC
nRD
R
R
CL
CL
VCC
VCC
R
CL
nA
nB R
Fig. 4. Logic diagram
CL
CL
nQ nQ
mna518
74HC_HCT123_Q100
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3.1 — 3 September 2020
© Nexperia B.V. 2020. All rights reserved
3 / 20
Nexperia
5. Pinning information
74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
5.1. Pinning
74HC123 74HCT123
1A 1 1B 2 1RD 3 1Q 4 2Q 5 2CEXT 6 2REXT/CEXT 7 GND 8
16 VCC 15 1REXT/CEXT 14 1CEXT 13 1Q 12 2Q 11 2RD 10 2B 9 2A
001aaa698
Fig. 5. Pin configuration SOT109-1 (SO16) and SOT403-1 (TSSOP16)
74HC123
1 1A 16 VCC
terminal 1 index area
1B 2 1RD 3
1Q 4 2Q 5 2CEXT 6 2REXT/CEXT 7
VCC(1)
15 1REXT/CEXT 14 1CEXT 13 1Q 12 2Q 11 2RD 10 2B
GND 8 2A 9
001aaf046
Fig. 6.
Transparent top view
(1) This is not a supply pin. There is no electrical or mechanical requirement to solder the pad. In case soldered, the solder land should remain floating or connected to VCC.
Pin configuration SOT763-1 (DHVQFN16)
5.2. Pin description
Table 2. Pin description
Symbol
Pin
1A
1
1B
2
1RD
3
1Q
4
2Q
5
2CEXT
6
2REXT/CEXT
7
GND
8
2A
9
2B
10
2RD
11
2Q
12
1Q
13
1CEXT
14
1REXT/CEXT
15
VCC
16
Description negative-edge triggered input 1 positive-edge triggered input 1 direct reset LOW and positive-edge triggered input 1 active LOW output 1 active HIGH output 2 external capacitor connection 2 external resistor and capacitor connecti.