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CD14538B

ACTIVE

CMOS Dual Precision Monostable Multivibrator (125 C Operation)

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Data sheet

CD14538B

ACTIVE
Data sheet Order now

Product details

Number of channels 2 Supply voltage (min) (V) 3 Supply voltage (max) (V) 18 Technology family CD4000 Input type Standard CMOS Output type Push-Pull Supply current (µA) 3000 IOL (max) (mA) 4 IOH (max) (mA) -4 Features Balanced outputs, Positive input clamp diode, Retriggerable, Standard speed (tpd > 50ns) Operating temperature range (°C) -55 to 125 Rating Catalog
Number of channels 2 Supply voltage (min) (V) 3 Supply voltage (max) (V) 18 Technology family CD4000 Input type Standard CMOS Output type Push-Pull Supply current (µA) 3000 IOL (max) (mA) 4 IOH (max) (mA) -4 Features Balanced outputs, Positive input clamp diode, Retriggerable, Standard speed (tpd > 50ns) Operating temperature range (°C) -55 to 125 Rating Catalog
PDIP (N) 16 181.42 mm² 19.3 x 9.4 SOIC (D) 16 59.4 mm² 9.9 x 6 SOP (NS) 16 79.56 mm² 10.2 x 7.8 TSSOP (PW) 16 32 mm² 5 x 6.4
  • Retriggerable/resettable capability
  • Trigger and reset propagation delays independent of RX, CX
  • Triggering from leading or trailing edge
  • Q and Q\ buffered outputs available
  • Separate resets
  • Replaces CD4538B Type
  • 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
  • Maximum input current of 1 µA at 18 V over full package-temperature range; 100 nA at 18 V and 25°C
  • Noise margin (full package-temperature range):
    • 1 V at VDD = 5 V
    • 2 V at VDD = 10 V
    • 2.5 V at VDD = 15 V
  • 5-V, 10-V, and 15-V parametric ratings
  • 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

*T = 0.5 RXCX for CX 1000 pF
#T = RXCX; CXmin = 5000 pF
Data sheet acquired from Harris Semiconductor
  • Retriggerable/resettable capability
  • Trigger and reset propagation delays independent of RX, CX
  • Triggering from leading or trailing edge
  • Q and Q\ buffered outputs available
  • Separate resets
  • Replaces CD4538B Type
  • 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
  • Maximum input current of 1 µA at 18 V over full package-temperature range; 100 nA at 18 V and 25°C
  • Noise margin (full package-temperature range):
    • 1 V at VDD = 5 V
    • 2 V at VDD = 10 V
    • 2.5 V at VDD = 15 V
  • 5-V, 10-V, and 15-V parametric ratings
  • 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

*T = 0.5 RXCX for CX 1000 pF
#T = RXCX; CXmin = 5000 pF
Data sheet acquired from Harris Semiconductor

CD14538B dual precision monostable multivibrator provides stable retriggerable/resettable one-shot operation for any fixed-voltage timing application.

An external resistor (RX) and an external capacitor (CX) control the timing and accuracy for the circuit. Adjustment of RX and CX provides a wide range of output pulse widths from the Q and Q\ terminals. The time delay from trigger input to output transition (trigger propagation delay) and the time delay from reset input to output transition (reset propagation delay) are independent of RX and CX. Precision control of output pulse widths is achieved through linear CMOS techniques.

Leading-edge-triggering (+TR) and trailing-edge-triggering (-TR) inputs are provided for triggering from either edge of an input pulse. An unused +TR input should be tied to VSS. An unused -TR input should be tied to VDD. A RESET (on low level) is provided for immediate termination of the output pulse or to prevent output pulses when power is turned on. An unused RESET input should be tied to VDD. However, if an entire section of the CD14538B is not used, its inputs must be tied to either VDD or VSS. See Table 1.

In normal operation the circuit retriggers (extends the output pulse one period) on the application of each new trigger pulse. For operation in the non-retriggerable mode, Q\ is connected to -TR when leading-edge triggering (+TR) is used or Q is connected to +TR when trailing-edge triggering (-TR) is used. The time period (T) for this multivibrator can be calculated by: T = RXCX.

The minimum value of external resistance, RX, is 4 K. The minimum and maximum values of external capacitance, CX are 0 pF and 100µF, respectively.

The CD14538B is interchangeable with type MC14538 and is similar to and pin-compatible with the CD4098B* and CD4538B. It can replace the CD4538B which type is not recommended for new designs.

The CD14538B types are supplied in 16-lead hermetic dual-in-line ceramic packages (F3A suffix), 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline packages (M, M96, MT, and NSR suffixes), and 16-lead thin shrink small-outline packages (PW and PWR suffixes).

CD14538B dual precision monostable multivibrator provides stable retriggerable/resettable one-shot operation for any fixed-voltage timing application.

An external resistor (RX) and an external capacitor (CX) control the timing and accuracy for the circuit. Adjustment of RX and CX provides a wide range of output pulse widths from the Q and Q\ terminals. The time delay from trigger input to output transition (trigger propagation delay) and the time delay from reset input to output transition (reset propagation delay) are independent of RX and CX. Precision control of output pulse widths is achieved through linear CMOS techniques.

Leading-edge-triggering (+TR) and trailing-edge-triggering (-TR) inputs are provided for triggering from either edge of an input pulse. An unused +TR input should be tied to VSS. An unused -TR input should be tied to VDD. A RESET (on low level) is provided for immediate termination of the output pulse or to prevent output pulses when power is turned on. An unused RESET input should be tied to VDD. However, if an entire section of the CD14538B is not used, its inputs must be tied to either VDD or VSS. See Table 1.

In normal operation the circuit retriggers (extends the output pulse one period) on the application of each new trigger pulse. For operation in the non-retriggerable mode, Q\ is connected to -TR when leading-edge triggering (+TR) is used or Q is connected to +TR when trailing-edge triggering (-TR) is used. The time period (T) for this multivibrator can be calculated by: T = RXCX.

The minimum value of external resistance, RX, is 4 K. The minimum and maximum values of external capacitance, CX are 0 pF and 100µF, respectively.

The CD14538B is interchangeable with type MC14538 and is similar to and pin-compatible with the CD4098B* and CD4538B. It can replace the CD4538B which type is not recommended for new designs.

The CD14538B types are supplied in 16-lead hermetic dual-in-line ceramic packages (F3A suffix), 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline packages (M, M96, MT, and NSR suffixes), and 16-lead thin shrink small-outline packages (PW and PWR suffixes).
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Other devices and data sheet

This data sheet applies to both  CD14538B and  CD14538B-MIL

Technical documentation

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Type Title Date
* Data sheet CD14538B TYPES datasheet (Rev. C) 13 Oct 2003
* SMD CD14538B SMD 5962-90557 21 Jun 2016
Application note Designing With the SN74LVC1G123 Monostable Multivibrator (Rev. A) PDF | HTML 13 Mar 2020
Application note Wave Solder Exposure of SMT Packages 09 Sep 2008

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Evaluation board

14-24-LOGIC-EVM — Logic product generic evaluation module for 14-pin to 24-pin D, DB, DGV, DW, DYY, NS and PW packages

The 14-24-LOGIC-EVM evaluation module (EVM) is designed to support any logic device that is in a 14-pin to 24-pin D, DW, DB, NS, PW, DYY or DGV package,

User guide: PDF | HTML
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Package Pins CAD symbols, footprints & 3D models
PDIP (N) 16 Ultra Librarian
SOIC (D) 16 Ultra Librarian
SOP (NS) 16 Ultra Librarian
TSSOP (PW) 16 Ultra Librarian
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