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5962-8970001EA +BOM

High Speed CMOS Logic Dual Retriggerable Monostable Multivibrators with Resets

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

5962-8970001EA
Datasheet:

5962-8970001EA Datasheet (PDF)
Number of channels:

2
Supply voltage (min) (V):

4.5
Supply voltage (max) (V):

5.5
Technology family:

HCT
EDA/CAD Models:

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5962-8970001EA General Description

The HC123, HCT123, CD74HC423 and CD74HCT423 are dual monostable multivibrators with resets. They are all retriggerable and differ only in that the 123 types can be triggered by a negative to positive reset pulse; whereas the 423 types do not have this feature. An external resistor (R_X) and an external capacitor (C_X) control the timing and the accuracy for the circuit. Adjustment of Rx and C_X provides a wide range of output pulse widths from the Q and Q\ terminals. Pulse triggering on the A\ and B inputs occur at a particular voltage level and is not related to the rise and fall times of the trigger pulses.

Once triggered, the output pulse width may be extended by retriggering inputs A\ and B. The output pulse can be terminated by a LOW level on the Reset (R) pin. Trailing edge triggering (A)\ and leading edge triggering (B) inputs are provided for triggering from either edge of the input pulse. If either Mono is not used each input on the unused device (A\, B, and R\) must be terminated high or low.

The minimum value of external resistance, Rx is typically 5k. The minimum value external capacitance, C_X, is 0pF. The calculation for the pulse width is t_W = 0.45 R_XC_X at V_CC = 5V.

Key Features

Overriding Reset Terminates Output Pulse
Triggering From the Leading or Trailing Edge
Q and Q\ Buffered Outputs
Separate Resets
Wide Range of Output-Pulse Widths
Schmitt Trigger on Both A\ and B Inputs
Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
Wide Operating Temperature Range . . . –55°C to 125°C
Balanced Propagation Delay and Transition Times
Significant Power Reduction Compared to LSTTL Logic ICs
HC Types
- 2V to 6V Operation
- High Noise Immunity: N_IL = 30%, N_IH = 30% of V_CC at V_CC = 5V
HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility, V_IL = 0.8V (Max), V_IH = 2V (Min)
- CMOS Input Compatibility, I_l 1µA at V_OL, V_OH

Specifications

Number of channels	2	Supply voltage (min) (V)	4.5
Supply voltage (max) (V)	5.5	Technology family	HCT
Input type	TTL-Compatible CMOS	Output type	Push-Pull
Supply current (µA)	160	IOL (max) (mA)	4
IOH (max) (mA)	-4	Features	Balanced outputs, High speed (tpd 10-50ns), Positive input clamp diode, Retriggerable
Operating temperature range (°C)	-55 to 125	Rating	Military