Overview
The CD14538BM is a dual precision monostable multivibrator produced by Texas Instruments. This component is designed to provide stable, retriggerable/resettable one-shot operation for various fixed-voltage timing applications. It is part of the 4000/14000/40000 series of CMOS logic ICs and is known for its precision and versatility in timing and pulse generation.
The CD14538BM is interchangeable with other types such as the MC14538 and is pin-compatible with the CD4098B and CD4538B, making it a suitable replacement for the CD4538B in new designs.
Key Specifications
| Specification | Value |
|---|---|
| Package Type | SOIC-16 |
| Operating Temperature Range | -55°C to 125°C |
| Supply Voltage | 3.0 V to 18.0 V |
| Propagation Delay (tpd) | 600.0 ns |
| Power Supply Current (ICC) | 0.3 mA (max) |
| 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 |
| Load Capacitance (CL) | 50.0 pF |
| Maximum Output Current (Iol) | 0.004 A |
| Moisture Sensitivity Level | 1 |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27 mm |
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 controlled by external resistor (RX) and capacitor (CX)
- Schmitt-trigger input allows unlimited rise and fall times on +TR and -TR inputs
- 100% tested for maximum quiescent current at 20 V
- 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 CD14538BM used for?
The CD14538BM is used for pulse delay and timing, as well as pulse shaping in various electronic circuits.
- What is the operating temperature range of the CD14538BM?
The operating temperature range is -55°C to 125°C.
- What is the supply voltage range for the CD14538BM?
The supply voltage range is 3.0 V to 18.0 V.
- How is the output pulse width controlled in the CD14538BM?
The output pulse width is controlled by an external resistor (RX) and an external capacitor (CX).
- Does the CD14538BM support retriggering?
- What type of inputs does the CD14538BM have for triggering?
The CD14538BM has leading-edge-triggering (+TR) and trailing-edge-triggering (-TR) inputs.
- What is the maximum input current for the CD14538BM?
The maximum input current is 1 µA at 18 V over the full package-temperature range, and 100 nA at 18 V and 25°C.
- Is the CD14538BM compatible with other components?
- What is the noise margin of the CD14538BM?
The noise margin is 1 V at VDD= 5 V, 2 V at VDD= 10 V, and 2.5 V at VDD= 15 V.
- What is the maximum output current of the CD14538BM?
The maximum output current (Iol) is 0.004 A.
