HEF4538BT-Q100: Dual precision monostable multivibrator
The HEF4538B-Q100 is a dual retriggerable-resettable monostable multivibrator. Each
multivibrator has an active LOW trigger/retrigger input (nA) and an active HIGH
trigger/retrigger input (nB). It has an overriding active LOW direct reset input (nCD) and an
output (nQ) together with its complement (nQ). There are also two pins for connecting the
external timing components Cext and Rext. These pins, nREXT/CEXT, and nCEXT, are
always connected to ground. Typical pulse width variation over the specified temperature
range is ±0.2 %.
Either the positive or the negative edges of the input pulse can trigger the multivibrator.
The trigger produces an accurate output pulse with a pulse width range of 10 μs to infinity.
The external timing components Cext and Rext determine the duration and accuracy of the
output pulse. The output pulse width (tW) is equal to Rext x Cext. The linear design
techniques in LOCMOS (Local Oxide CMOS) guarantee precise control of the output
pulse width. A LOW level at nCD terminates the output pulse immediately. The Schmitt
trigger action of the trigger inputs, makes the circuit highly tolerant of slower rise and fall
times.
It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS
(usually ground). Unused inputs must be connected to VDD, VSS, or another input.
This product has been qualified to the Automotive Electronics Council (AEC) standard
Q100 (Grade 1) and is suitable for use in automotive applications.
sot109-1_3d
Data Sheets (1)
Application Notes (1)
Brochures (2)
Package Information (1)
Packing (1)
Supporting Information (2)
Ordering Information
| Product | Status | VCC (V) | Family | Description | Logic switching levels | Output drive capability (mA) | tpd (ns) | Power dissipation considerations | Tamb (Cel) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package name | No of pins | Package version |
|---|
| HEF4538BT-Q100 | Active | 4.5 - 15.5 | HEF4000B | dual retriggerable precision monostable multivibrator | CMOS | +/- 2.4 | 60 | medium | -40~85 | 79 | 3.5 | 37 | SO16 | 16 | SOT109-1 |
Package Information
| Product ID | Package Description | Outline Version | Reflow/Wave Soldering | Packing | Product Status | Part NumberOrdering code(12NC) | Marking | Chemical Content | RoHS / Pb Free / RHF | LeadFree Conversion Date | EFR | MSL | MSL LF |
|---|
| HEF4538BT-Q100 | | SOT109-1 | SO-SOJ-REFLOW
SO-SOJ-WAVE
SO-SOJ-REFLOW
SO-SOJ-WAVE | Reel 13" Q1/T1 | Active | HEF4538BT-Q100J
(9353 001 14118) | HEF4538BT | HEF4538BT-Q100 |    | Always Pb-free | 75.3 | 1 | 1 |
