CD14538B Series

CMOS Dual Precision Monostable Multivibrator (125 C Operation)

Catalog

CMOS Dual Precision Monostable Multivibrator (125 C Operation)

Part	Supplier Device Package	Propagation Delay	Package / Case	Package / Case	Package / Case	Operating Temperature [Min]	Operating Temperature [Max]	Current - Output High, Low [custom]	Current - Output High, Low [custom]	Logic Type	Voltage - Supply [Max]	Voltage - Supply [Min]	Mounting Type	Independent Circuits	Package / Case [x]	Package / Case [y]
Texas Instruments CD14538BE	16-PDIP	100 ns	0.3 in	16-DIP	7.62 mm	-55 °C	125 °C	6.8 mA	6.8 mA	Monostable	18 V	3 V	Through Hole	2
Texas Instruments CD14538BPW	16-TSSOP	100 ns		16-TSSOP		-55 °C	125 °C	6.8 mA	6.8 mA	Monostable	18 V	3 V	Surface Mount	2	0.173 in	4.4 mm
Texas Instruments CD14538BPWR	16-TSSOP	100 ns		16-TSSOP		-55 °C	125 °C	6.8 mA	6.8 mA	Monostable	18 V	3 V	Surface Mount	2	0.173 in	4.4 mm
Texas Instruments CD14538BNSR	16-SO	100 ns	0.209 "	16-SOIC	5.3 mm	-55 °C	125 °C	6.8 mA	6.8 mA	Monostable	18 V	3 V	Surface Mount	2
Texas Instruments CD14538BPWRG4	16-TSSOP	100 ns		16-TSSOP		-55 °C	125 °C	6.8 mA	6.8 mA	Monostable	18 V	3 V	Surface Mount	2	0.173 in	4.4 mm
Texas Instruments CD14538BPWG4	16-TSSOP	100 ns		16-TSSOP		-55 °C	125 °C	6.8 mA	6.8 mA	Monostable	18 V	3 V	Surface Mount	2	0.173 in	4.4 mm
Texas Instruments CD14538BM96	16-SOIC	100 ns		16-SOIC		-55 °C	125 °C	6.8 mA	6.8 mA	Monostable	18 V	3 V	Surface Mount	2	0.154 in	3.9 mm
Texas Instruments CD14538BMT	16-SOIC	100 ns		16-SOIC		-55 °C	125 °C	6.8 mA	6.8 mA	Monostable	18 V	3 V	Surface Mount	2	0.154 in	3.9 mm

Catalog

CMOS Dual Precision Monostable Multivibrator (125 C Operation)

Key Features

• Retriggerable/resettable capabilityTrigger and reset propagation delays independent of RX, CXTriggering from leading or trailing edgeQ and Q\ buffered outputs availableSeparate resetsReplaces CD4538B TypeWide range of output-pulse widthsSchmitt-trigger input allows unlimited rise and fall times on +TR and -TR inputs100% tested for maximum quiescent current at 20 VMaximum input current of 1 µA at 18 V over full package-temperature range; 100 nA at 18 V and 25°CNoise margin (full package-temperature range):1 V at VDD= 5 V2 V at VDD= 10 V2.5 V at VDD= 15 V5-V, 10-V, and 15-V parametric ratingsStandardized, symmetrical output characteristicsMeets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of 'B' Series CMOS Devices"Applications:Pulse delay and timingPulse shaping*T = 0.5 RXCXfor CX1000 pF#T = RXCX; CXmin = 5000 pFData sheet acquired from Harris SemiconductorRetriggerable/resettable capabilityTrigger and reset propagation delays independent of RX, CXTriggering from leading or trailing edgeQ and Q\ buffered outputs availableSeparate resetsReplaces CD4538B TypeWide range of output-pulse widthsSchmitt-trigger input allows unlimited rise and fall times on +TR and -TR inputs100% tested for maximum quiescent current at 20 VMaximum input current of 1 µA at 18 V over full package-temperature range; 100 nA at 18 V and 25°CNoise margin (full package-temperature range):1 V at VDD= 5 V2 V at VDD= 10 V2.5 V at VDD= 15 V5-V, 10-V, and 15-V parametric ratingsStandardized, symmetrical output characteristicsMeets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of 'B' Series CMOS Devices"Applications:Pulse delay and timingPulse shaping*T = 0.5 RXCXfor CX1000 pF#T = RXCX; CXmin = 5000 pFData sheet acquired from Harris Semiconductor

Description

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 RXand CXprovides 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 RXand 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 VDDor 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, CXare 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 RXand CXprovides 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 RXand 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 VDDor 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, CXare 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).