HEF4538BT
Dual precision monostable multivibrator
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The HEF4538B is a dual retriggerable-resettable monostable multivibrator. Each multivibrator has an active LOW trigger/retrigger input (nA), an active HIGH trigger/retrigger input (nB), an overriding active LOW direct reset input (nCD), an output (nQ) and its complement (nQ), and two pins (nREXT/CEXT, and nCEXT, always connected to ground) for connecting the external timing components CEXT and REXT. Typical pulse width variation over the specified temperature range is ±0.2 %.
The multivibrator may be triggered by either the positive or the negative edges of the input pulse and will produce an accurate output pulse with a pulse width range of 10 μs to infinity. The duration and accuracy of the output pulse are determined by the external timing components CEXT and REXT. The output pulse width (tW) is equal to REXT× 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 trigger inputs’ Schmitt trigger action 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.
Features and benefits
- Tolerant of slow trigger rise and fall times
- Fully static operation
- 5 V, 10 V, and 15 V parametric ratings
- Standardized symmetrical output characteristics
- Operates across the automotive temperature range -40 °C to +125 °C
- Complies with JEDEC standard JESD 13-B
Applications
- Automotive and industrial
- Series HEF4000B
HEF4000 Series
- Series HEF4538B
Dual precision monostable multivibrator
- Parametric search all Multivibrators
All information on this product information page is subject to the subsequent disclaimers:
Parametrics of this product
| Type number | Package | Nr of pins | Package name | Product status | tpd(ns) | VCC(V) | Family | Power dissipation considerations | Logic switching levels | Output drive capability(mA) | Description | Tamb(Cel) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HEF4538BT | SOT109-1 (SO16) | 16 | SO16 | Production | 60 | 4.5 - 15.5 | HEF | medium | CMOS | +/- 2.4 | dual retriggerable precision monostable multivibrator | -40~85 |
Similar products
- Series HEF4000B
- Series HEF4538B
- Parametric search all Multivibrators
- Parametrics series
Package
Outline drawing
| Package Version | Package Name | Package Description | Reference Codes | Issue Date |
|---|---|---|---|---|
| SOT109-1 | SO16 | plastic small outline package; 16 leads; body width 3.9 mm | MS-012 (JEDEC); 076E07 (IEC); | 2003-02-19 |
Quality, reliability & chemical content
| Type number | Orderable part number | Chemical content | RoHS | Leadfree conversion date | RHF | IFR (FIT) | MTBF (hours) | MSL | MSL LF |
|---|---|---|---|---|---|---|---|---|---|
| HEF4538BT | HEF4538BT,652 | HEF4538BT |  | week 12, 2005 |  | 2.99 | 3.3444816053511703E8 | 1 | 1 |
| HEF4538BT | HEF4538BT,653 | HEF4538BT | | week 12, 2005 | | 2.99 | 3.3444816053511703E8 | 1 | 1 |
Documentation for this product
Ordering & availability
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