Overview
The CD14538BPWRG4 is a dual precision monostable multivibrator produced by Texas Instruments. This component provides stable retriggerable/resettable one-shot operation for any fixed-voltage timing application. It is designed to offer precise control over output pulse widths using external resistor and capacitor configurations. The CD14538BPWRG4 is interchangeable with the MC14538 and is similar to and pin-compatible with the CD4098B and CD4538B, making it a versatile choice for various timing and pulse shaping applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | TSSOP (Thin Shrink Small-Outline Package) |
| Pins | 16 |
| Operating Temperature Range (°C) | -55 to 125 |
| 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 |
| Input Current at 18 V and 25°C | 100 nA |
| Noise Margin at VDD= 5 V | 1 V |
| Noise Margin at VDD= 10 V | 2 V |
| Noise Margin at VDD= 15 V | 2.5 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
- 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 CD14538BPWRG4 used for? The CD14538BPWRG4 is used for pulse delay and timing, as well as pulse shaping applications.
- What types of packages are available for the CD14538B? The CD14538B is available in 16-lead hermetic dual-in-line ceramic packages, 16-lead dual-in-line plastic packages, 16-lead small-outline packages, and 16-lead thin shrink small-outline packages.
- What is the operating temperature range of the CD14538BPWRG4? The operating temperature range is -55°C to 125°C.
- How is the output pulse width controlled in the CD14538BPWRG4? The output pulse width is controlled by an external resistor (RX) and an external capacitor (CX).
- Can the CD14538BPWRG4 be triggered from either edge of an input pulse? Yes, it supports both leading-edge-triggering and trailing-edge-triggering.
- What is the minimum value of external resistance (RX) required? The minimum value of RX is 4 KΩ.
- What is the range of external capacitance (CX)? The range of CX is from 0 pF to 100 µF.
- Is the CD14538BPWRG4 compatible with other Texas Instruments components? Yes, it is interchangeable with the MC14538 and similar to the CD4098B and CD4538B.
- What are the noise margins at different VDD values? The noise margins are 1 V at VDD= 5 V, 2 V at VDD= 10 V, and 2.5 V at VDD= 15 V.
- How is the reset function implemented in the CD14538BPWRG4? The reset function is implemented through a separate reset input that can immediately terminate the output pulse or prevent output pulses when power is turned on.
