SN74LS122 SCHOTTKY Datasheet

SN74LS122 Datasheet, PDF, Equivalent


Part Number

SN74LS122

Description

LOW POWER SCHOTTKY

Manufacture

ON Semiconductor

Total Page 12 Pages
Datasheet
Download SN74LS122 Datasheet


SN74LS122
SN74LS122 SN74LS123
Retriggerable Monostable
Multivibrators
These dc triggered multivibrators feature pulse width control by
three methods. The basic pulse width is programmed by selection of
external resistance and capacitance values. The LS122 has an internal
timing resistor that allows the circuits to be used with only an external
capacitor. Once triggered, the basic pulse width may be extended by
retriggering the gated low-level-active (A) or high-level-active (B)
inputs, or be reduced by use of the overriding clear.
Overriding Clear Terminates Output Pulse
Compensated for VCC and Temperature Variations
DC Triggered from Active-High or Active-Low Gated Logic Inputs
Retriggerable for Very Long Output Pulses, up to 100% Duty Cycle
Internal Timing Resistors on LS122
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
VCC Supply Voltage
TA Operating Ambient
Temperature Range
4.75
0
IOH
IOL
Rext
Cext
Rext/Cext
Output Current – High
Output Current – Low
External Timing Resistance
External Capacitance
Wiring Capacitance at
Rext/Cext Terminal
5.0
Typ Max
5.0 5.25
25 70
– 0.4
8.0
260
No Restriction
50
Unit
V
°C
mA
mA
kW
pF
http://onsemi.com
LOW POWER SCHOTTKY
14
1
PLASTIC
N SUFFIX
CASE 646
14
1
SOIC
D SUFFIX
CASE 751A
16
1
PLASTIC
N SUFFIX
CASE 648
© Semiconductor Components Industries, LLC, 1999
December, 1999 – Rev. 6
16
1
SOIC
D SUFFIX
CASE 751B
ORDERING INFORMATION
Device
Package
Shipping
SN74LS122N 14 Pin DIP 2000 Units/Box
SN74LS122D
14 Pin
2500/Tape & Reel
SN74LS123N 16 Pin DIP 2000 Units/Box
SN74LS123D
16 Pin
2500/Tape & Reel
1 Publication Order Number:
SN74LS122/D

SN74LS122
SN74LS122 SN74LS123
SN74LS123 (TOP VIEW)
(SEE NOTES 1 THRU 4)
1 Rext/ 1
VCC Cext Cext 1Q
2
2Q CLR
2B
16 15 14 13 12 11 10
2A
9
Q
CLR Q
CLR
Q
Q
1 2 3 4 56 78
1A 1B 1 1Q 2Q 2
2 GND
CLR Cext Rext/
Cext
SN74LS122 (TOP VIEW)
(SEE NOTES 1 THRU 4)
Rext/
VCC Cext NC Cext NC Rint
14 13 12 11 10 9
Q
8
Rint
Q
CLR Q
1234567
A1 A2 B1 B2 CLR Q GND
NC — NO INTERNAL CONNECTION.
NOTES:
1. An external timing capacitor may be connected between Cext and Rext/Cext (positive).
2. To use the internal timing resistor of the LS122, connect Rint to VCC.
3. For improved pulse width accuracy connect an external resistor between Rext/Cext and VCC with Rint open-circuited.
4. To obtain variable pulse widths, connect an external variable resistance between Rint/Cext and VCC.
http://onsemi.com
2


Features SN74LS122 SN74LS123 Retriggerable Monost able Multivibrators These dc triggered multivibrators feature pulse width cont rol by three methods. The basic pulse w idth is programmed by selection of exte rnal resistance and capacitance values. The LS122 has an internal timing resis tor that allows the circuits to be used with only an external capacitor. Once triggered, the basic pulse width may be extended by retriggering the gated low -level-active (A) or high-level-active (B) inputs, or be reduced by use of the overriding clear. • Overriding Clear Terminates Output Pulse • Compensate d for VCC and Temperature Variations DC Triggered from Active-High or Acti ve-Low Gated Logic Inputs • Retrigger able for Very Long Output Pulses, up to 100% Duty Cycle • Internal Timing Re sistors on LS122 http://onsemi.com LOW POWER SCHOTTKY 14 1 PLASTIC N SUFFIX CASE 646 GUARANTEED OPERATING RANGES Symbol VCC TA IOH IOL Rext Cext Rext/Ce xt Parameter Supply Voltage Operating Ambient Temperature Range Output Cu.
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