Logic selection guide 2016
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MULTIVIBRATORS<br />
Features and benefits<br />
4 Simple control interface<br />
4 Power-on reset<br />
4 Dual devices with separate reset inputs<br />
4 Negative or positive edge triggered<br />
4 Low-power CMOS<br />
Applications<br />
4 Timing delays in synchronous control circuits<br />
Multivibrators<br />
Type number Description V CC<br />
(V)<br />
<strong>Logic</strong><br />
switching<br />
levels<br />
Output<br />
drive<br />
capability<br />
(mA)<br />
t pd<br />
(ns)<br />
Output<br />
Load<br />
C L (Typ)<br />
T amb<br />
(°C)<br />
74AHC123 Dual retriggerable monostable multivibrator with reset 2.0 to 5.5 CMOS ±8 5.1 50 pF -40 to +125<br />
74AHCT123<br />
Dual retriggerable monostable multivibrator with reset;<br />
TTL-enabled<br />
4.5 to 5.5 TTL ±8 5 50 pF -40 to +125<br />
74HC123 Dual retriggerable monostable multivibrator with reset 2.0 to 6.0 CMOS ±7.8 9 50 pF -40 to +125<br />
74HCT123<br />
Dual retriggerable monostable multivibrator with reset;<br />
TTL-enabled<br />
4.5 to 5.5 TTL ±4 26 50 pF -40 to +125<br />
74HC221 dual non-retriggerable monostable multivibrator with reset 2.0 to 6.0 CMOS ±5.2 29 50 pF -40 to +125<br />
74HCT221<br />
dual non-retriggerable monostable multivibrator with reset;<br />
TTL-enabled<br />
4.5 to 5.5 TTL ±4 32 50 pF -40 to +125<br />
74HC423 Dual retriggerable monostable multivibrator with reset 2.0 to 6.0 CMOS ±5.2 23 50 pF -40 to +125<br />
74HCT423<br />
Dual retriggerable monostable multivibrator with reset;<br />
TTL-enabled<br />
4.5 to 5.5 TTL ±4 26 50 pF -40 to +125<br />
74HC4538 Dual retriggerable precision monostable multivibrator 2.0 to 6.0 CMOS ±5.2 27 50 pF -40 to +125<br />
74HCT4538<br />
Dual retriggerable precision monostable multivibrator;<br />
TTL-enabled<br />
4.5 to 5.5 TTL ±4 30 50 pF -40 to +125<br />
74LV123 Dual retriggerable monostable multivibrator with reset 1.0 to 5.5 TTL ±12 20 50 pF -40 to +125<br />
74LVC1G123 Single retriggerable monostable multivibrator 1.65 to 5.5<br />
CMOS/<br />
LVTTL<br />
±32 3.5 50 pF -40 to +125<br />
HEF4047 Monostable/astable multivibrator 4.5 to 15.5 CMOS ±2.4 50 50 pF -40 to +85<br />
HEF4528 Dual retriggerable monostable multivibrator with reset 4.5 to 15.5 CMOS ±2.4 40 50 pF -40 to +85<br />
Note: Selected package types only. Complete package listings are in the previous section and online at www.nxp.com/logic.<br />
98 NXP <strong>Logic</strong> <strong>selection</strong> <strong>guide</strong> <strong>2016</strong>