MC74HC4538A: Dual Precision Monostable Multivibrator
The MC74HC4538A is identical in pinout to the MC14538B. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. This dual monostable multivibrator may be triggered by either the positive or the negative edge of an input pulse, and produces a precision output pulse over a wide range of pulse widths. Because the device has conditioned trigger inputs, there are no trigger-input rise and fall time restrictions. The output pulse width is determined by the external timing components, Rx and Cx. The device has a reset function which forces the Q output low and the Qbar output high, regardless of the state of the output pulse circuitry.
Features- Unlimited Rise and Fall Times Allowed on the Trigger Inputs
- Output Pulse is Independent of the Trigger Pulse Width
- +/- 10% Guaranteed Pulse Width Variation from Part to Part (Using the Same Test Jig)
- Output Drive Capability: 10 LSTTL Loads
- Outputs Directly Interface to CMOS, NMOS and TTL
- Operating Voltage Range: 3.0 to 6.0 V
- Low Input Current: 1.0 mA
- High Noise Immunity Characteristic of CMOS Devices
- In Compliance with the Requirements Defined by JEDEC Standard No. 7A
- Chip Complexity: 145 FETs or 36 Equivalent Gates
- Pb-Free Packages are Available*
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Application Notes (1)
Data Sheets (1)
Simulation Models (1)
Package Drawings (2)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| MC74HC4538ADG | Active | Pb-free
Halide free | SOIC-16 | 751B-05 | 1 | Tube | 48 | $0.2933 |
| MC74HC4538ADR2G | Active | Pb-free
Halide free | SOIC-16 | 751B-05 | 1 | Tape and Reel | 2500 | $0.2933 |
| MC74HC4538ADTR2G | Active | Pb-free
Halide free | TSSOP-16 | 948F-01 | 1 | Tape and Reel | 2500 | $0.2933 |
| NLV74HC4538ADR2G | Active | AEC Qualified
PPAP Capable
Pb-free
Halide free | SOIC-16 | 751B-05 | 1 | Tape and Reel | 2500 | $0.3227 |
| NLVHC4538ADTR2G | Active | AEC Qualified
PPAP Capable
Pb-free
Halide free | TSSOP-16 | 948F-01 | 1 | Tape and Reel | 2500 | $0.4667 |
Specifications
| Product | Type | VCC Min (V) | VCC Max (V) | tpd Max (ns) | PD Max (W) | IO Max (mA) |
|---|
| MC74HC4538ADG | Multivibrator | 3 | 6 | 35 | 0.5 | 4 |
| MC74HC4538ADR2G | Multivibrator | 3 | 6 | 35 | 0.5 | 4 |
| MC74HC4538ADTR2G | Multivibrator | 3 | 6 | 35 | 0.45 | 4 |
| NLV74HC4538ADR2G | Multivibrator | 3 | 6 | 35 | 0.5 | 4 |
| NLVHC4538ADTR2G | Multivibrator | 3 | 6 | 35 | 0.45 | 4 |
