SN74LV123A Texas instruments

SN74LV123A

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SN74LV123A

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Описание

The LV123A devices are dual retriggerable monostable multivibrators designed for 2-V to 5.5-V VCC operation. These edge-triggered multivibrators feature output pulse-duration control by three methods. In the first method, the A input is low, and the B input goes high. In the second method, the B input is high, and the A input goes low. In the third method, the A input is low, the B input is high, and the clear (CLR) input goes high. The output pulse duration is programmable by selecting external resistance and capacitance values. The external timing capacitor must be connected between Cext and Rext/Cext (positive) and an external resistor connected between Rext/Cext and VCC. To obtain variable pulse durations, connect an external variable resistance between Rext/Cext and VCC. The output pulse duration also can be reduced by taking CLR low.

2-V to 5.5-V V_CC Operation
Maximum t_pd of 11 ns at 5 V
Typical V_OLP (Output Ground Bounce)
< 0.8 V at V_CC = 3.3 V, T_A = 25°C
Typical V_OHV (Output V_OH Undershoot)
> 2.3 V at V_CC = 3.3 V, T_A = 25°C
Support Mixed-Mode Voltage Operation on
All Ports
Schmitt-Trigger Circuitry on A, B, and CLR Inputs
for Slow Input Transition Rates
Edge Triggered From Active-High or
Active-Low Gated Logic Inputs
I_off Supports Partial-Power-Down Mode Operation
Retriggerable for Very Long Output Pulses,
up to 100% Duty Cycle
Overriding Clear Terminates Output Pulse
Glitch-Free Power-Up Reset on Outputs
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class 11
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
- 1000-V Charged-Device Model (C101)

Number of channels	2
Supply voltage (min) (V)	2
Supply voltage (max) (V)	5.5
Technology family	LV-A
Input type	Schmitt-Trigger
Output type	Push-Pull
Supply current (µA)	20
IOL (max) (mA)	12
IOH (max) (mA)	-12
Features	Balanced outputs, High speed (tpd 10-50ns), Over-voltage tolerant inputs, Partial power down (Ioff), Retriggerable
Operating temperature range (°C)	-40 to 125
Rating	Catalog