Overview
The CD14538BE, produced by Texas Instruments, is a CMOS Dual Precision Monostable Multivibrator. This component provides stable, retriggerable/resettable one-shot operation for various fixed-voltage timing applications. It is designed to offer precision control over output pulse widths using external resistor and capacitor configurations. The CD14538BE is interchangeable with the MC14538 and is similar to and pin-compatible with the CD4098B and CD4538B, making it a versatile choice for a range of timing and pulse shaping applications.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Package Type | PDIP, CDIP, SOIC, SOP, TSSOP | Varying suffixes (E, F3A, M, M96, MT, NSR, PW, PWR) |
| Pins | 16 | |
| Operating Temperature Range | -55°C to 125°C | |
| Minimum External Resistance (RX) | 4 KΩ | |
| External Capacitance (CX) Range | 0 pF to 100 µF | |
| Trigger Propagation Delay | Independent of RX and CX | |
| Reset Propagation Delay | Independent of RX and CX | |
| Maximum Input Current | 1 µA at 18 V (full package-temperature range), 100 nA at 18 V and 25°C | |
| Noise Margin | 1 V at VDD= 5 V, 2 V at VDD= 10 V, 2.5 V at VDD= 15 V |
Key Features
- Retriggerable/resettable capability
- Trigger and reset propagation delays independent of RX and CX
- Triggering from leading or trailing edge
- Q and Q̄ buffered outputs available
- Separate resets
- Wide range of output-pulse widths
- Schmitt-trigger input allows unlimited rise and fall times on +TR and -TR inputs
- 100% tested for maximum quiescent current at 20 V
- Standardized, symmetrical output characteristics
- Meets all requirements of JEDEC Tentative Standard No. 13B, 'Standard Specifications for Description of 'B' Series CMOS Devices'
Applications
- Pulse delay and timing
- Pulse shaping
Q & A
- What is the CD14538BE used for?
The CD14538BE is used for pulse delay and timing, as well as pulse shaping in various electronic circuits.
- What are the key features of the CD14538BE?
The key features include retriggerable/resettable capability, independent trigger and reset propagation delays, leading and trailing edge triggering, and a wide range of output pulse widths.
- What is the operating temperature range of the CD14538BE?
The operating temperature range is -55°C to 125°C.
- What types of packages are available for the CD14538BE?
The component is available in PDIP, CDIP, SOIC, SOP, and TSSOP packages with various suffixes.
- How is the output pulse width controlled in the CD14538BE?
The output pulse width is controlled by an external resistor (RX) and an external capacitor (CX).
- What is the minimum external resistance required for the CD14538BE?
The minimum external resistance (RX) is 4 KΩ.
- What is the range of external capacitance for the CD14538BE?
The external capacitance (CX) range is from 0 pF to 100 µF.
- Is the CD14538BE compatible with other components?
Yes, it is interchangeable with the MC14538 and similar to and pin-compatible with the CD4098B and CD4538B.
- What are the noise margin specifications for the CD14538BE?
The noise margin is 1 V at VDD= 5 V, 2 V at VDD= 10 V, and 2.5 V at VDD= 15 V.
- How is the trigger input handled in the CD14538BE?
The component allows triggering from either the leading or trailing edge of an input pulse.
