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HEF4938B
General description
The HEF4938B is a dual retriggerable-resettable monostable multivibrator. Each multivibrator has an active LOW trigger/retrigger input (I0), an active HIGH trigger/retrigger input (I1), an overriding active LOW direct reset input (CD), an output (O) and its complement (O), and two pins (CTC and RCTC) for connecting the external timing components Ct and Rt. Typical pulse width variation over temperature range is ±0.2%.
The HEF4938B 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 ms to infinity. The duration and accuracy of the output pulse are determined by the external timing components Ct and Rt. The output pulse width (T) is equal to Rt x Ct. The linear design techniques in LOCMOS guarantee precise control of the output pulse width. A LOW level at CD terminates the output pulse immediately.
Schmitt-trigger action in the inputs makes the circuit highly tolerant for slower rise and fall times.
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| HEF4938BT | HEF4938BT | 9350 597 80112 | Volume production | SOT109-1
(SO16) | Tube | Standard Marking | HEF4938BT
| week 6, 2004 |
| HEF4938BT | HEF4938BT-T | 9350 597 80118 | Volume production | SOT109-1
(SO16) | Reel Pack, SMD, 13" | Standard Marking | HEF4938BT
| week 6, 2004 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|
| HEF4938BT | 9350 597 80112 | not available | |||||||
| HEF4938BT | 9350 597 80118 | Order samples |
Parametrics/similar products
| Type number | Package | Description | Propagation Delay(ns) | Voltage | No. of Pins | Power Dissipation Considerations | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|---|
| HEF4938BT | SOT109-1
(SO16) | Dual Retriggerable Precision Monostable Multivibrator with Reset | 60@15V | 5.5-15.5 V | 16 | Low Power or Automotive Applications | CMOS | +/- 2.4 mA @ 15 V |
Similar products
HEF4938B
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