74HCT123PW Datasheet, PDF(5/25 Page) NXP Semiconductors – Dual retriggerable monostable multivibrator with reset

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74HCT123PW Datasheet, PDF (5/25 Pages) NXP Semiconductors – Dual retriggerable monostable multivibrator with reset

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NXP Semiconductors

74HC123; 74HCT123

Dual retriggerable monostable multivibrator with reset

6. Functional description

Table 3. Function table[1]

Input

nRD

ï¯

Output

L[2]

H[2]

L[2]

H[2]

[1] H = HIGH voltage level; L = LOW voltage level; X = donât care; ï = LOW-to-HIGH transition; ï¯ = HIGH-to-LOW transition;

= one HIGH level output pulse;

= one LOW level output pulse.

[2] If the monostable was triggered before this condition was established, the pulse will continue as programmed.

7. Limiting values

Table 4. Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).

Symbol Parameter

Conditions

Min Max Unit

VCC

supply voltage

IIK

input clamping current

VI < ï0.5 V or VI > VCC + 0.5 V

ï0.5 +7

ï±20 mA

IOK

output clamping current

output current

VO < ï0.5 V or VO > VCC + 0.5 V

except for pins nREXT/CEXT;

VO = ï0.5 V to (VCC + 0.5 V)

ï±20 mA

ï±25 mA

ICC

IGND

Tstg

supply current

ground current

storage temperature

ï50 mA

ï65 +150 ï°C

Ptot

total power dissipation

DIP16 package

[1] -

750 mW

SO16 package

[2] -

500 mW

SSOP16 package

[3] -

500 mW

TSSOP16 package

[3] -

500 mW

DHVQFN16 package

[4] -

500 mW

[1] For DIP16 package: Ptot derates linearly with 12 mW/K above 70 ï°C.

[2] For SO16 package: Ptot derates linearly with 8 mW/K above 70 ï°C.

[3] For SSOP16 and TSSOP16 packages: Ptot derates linearly with 5.5 mW/K above 60 ï°C.

[4] For DHVQFN16 package: Ptot derates linearly with 4.5 mW/K above 60 ï°C.

74HC_HCT123

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 8 â 16 December 2011

5 of 25

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