HCF4538B
DUAL MONOSTABLE MULTIVIBRATOR
RETRIGGERABLE/RESETTABLE CAPABILITYsTRIGGER AND RESET PROPAGATION DELAYS INDEPENDENT OF RX, CXsTRIGGERING FROM LEADING OR TRAILING EDGEsQ AND Q BUFFERED OUTPUT AVAILABLEsSEPARATE RESETSsWIDE RANGE OF OUTPUT PULSE WIDTHSs QUIESCENT CURRENT SPECIFIED UP TO 20Vs5V, 10V AND 15V PARAMETRIC RATINGSsSCHMITT TRIGGER INPUT ALLOWS
UNLIMITED RISE AND FALL TIMES ON +TR AND -TR INPUTSsINPUT LEAKAGE CURRENT
II = 100nA (MAX) AT VDD = 18V TA = 25°Cs100% TESTED FOR QUIESCENT CURRENT sMEETS ALL REQUIREMENTS OF JEDEC JESD13B \" STANDARD SPECIFICATIONS FOR DESCRIPTION OF B SERIES CMOS DEVICES\"
s
DIPSOPORDER CODES
PACKAGEDIPSOP
TUBEHCF4538BEYHCF4538BM1
T & RHCF4538M013TR
DESCRIPTION
The HCF4538B is a monolithic integrated circuitfabricated in Metal Oxide Semiconductortechnology available in DIP and SOP packages. The HCF4538B dual precision monostablemultivibrator provides stable retriggerable/resettable one-shot operation for any fixed voltagePIN CONNECTION
timing application. An external resistor (RX) andan external capacitor (CX) control the timing andaccuracy for the circuit. Adjustment of RX and CXprovides a wide range of output pulse widths fromthe Q and Q terminals. The time delay from triggerinput to output transition (trigger propagationdelay) and the time delay from reset input tooutput transition (reset propagation delay) and thetime delay from reset input to output transition(reset propagation delay) are independent of RXand CX. Precision control of output pulse width isachieved through linear CMOS techniques.Leading edge triggering (+TR) and trailing edgetriggering (-TR) inputs are provided for triggering
September 20011/10
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HCF4538B
from either edge of an input pulse. An unused +TRinput should be tied to VSS. An unused -TR inputshould be tied to VDD . A RESET (on low level) isprovided for immediate termination of the outputpulse or to prevent output pulses when power isturned on. An unused RESET input should be tiedto VDD . However, if an entire section of theHCF4538B is not used, its inputs must be tied toeither VDD or VSS (see table 1). In normaloperation the circuit triggers (extends the outputIINPUT EQUIVALENT CIRCUIT
pulse one period) on the application of each newtrigger pulse. For operation in the non-retiggerablemode, Q is connected to -TR when leading edgetriggering (+TR) is used or Q is connected to +TRwhen trailing edge triggering (-TR) is used. Thetime period (T) for this multivibrator can becalculated by : T = RX CX. The min. value ofexternal resistance, RX, is 4KΩ. The max. andmin. values of external capacitance, CX, are 100µF and 5nF, respectively. PIN DESCRIPTION
PIN No4, 125, 113, 131, 152, 146, 107, 9816
SYMBOL+TR-TRRESETCX1, CX2RXCX1RXCX2Q1, Q2Q1, Q2VSSVDD
NAME AND FUNCTIONTrigger Inputs (Low to High, Edge-Triggered)Trigger Inputs (High to Low, Edge-Triggered)Direct Reset Inputs (Active Low)
External Capacitor Con-nections
External Resistor/Capaci-tor ConnectionsPulse Outputs
Complementary Pulse Outputs
Negative Supply VoltagePositive Supply Voltage
Terminals 1, 8, 15 are electrically connected internally
FUNCTIONAL DIAGRAM
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HCF4538B
TABLE 1 : Functional Terminal Connections
VDD to Term. N°
VSS to Term. N°
Input Pulse to Term. N°
Other Connections
FUNCTION
Leading Edge Trigger/
Retriggerable
Leading Edge Trigger/Non
RetriggerableTrailing Edge Trigger/
Retriggerable
Trailing Edge Trigger/Non
Retriggerable
Mono (1)Mono (2)Mono (1)Mono (2)Mono (1)Mono (2)Mono (1)Mono (2)3, 5333
11, 13131313
4
12
4455
12121111
4, 6
12, 10
5, 7
11, 9
A Retriggerable one-shot multivibrator has an output pulse width which is extended on full time period (T) after application of the last trigger pulse.
A Non-Retriggerable one-shot multivibrator has a time period (T) referenced from the application of the firs trigger pulse.
LOGIC DIAGRAM
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HCF4538B
LOGIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
SymbolVDDVIIIPDTopTstg
Supply VoltageDC Input VoltageDC Input Current
Power Dissipation per Package
Power Dissipation per Output TransistorOperating TemperatureStorage Temperature
Parameter
Value-0.5 to +22-0.5 to VDD + 0.5
± 10200100-55 to +125-65 to +150
UnitVVmAmWmW°C°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied.
All voltage values are referred to VSS pin voltage.
RECOMMENDED OPERATING CONDITIONS
SymbolVDDVITop
Supply VoltageInput Voltage
Operating Temperature
Parameter
Value3 to 200 to VDD-55 to 125
UnitVV°C
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HCF4538B
DC SPECIFICATIONS
Test Condition
Symbol
Parameter
VI(V)0/50/100/150/200/50/100/155/010/015/0
0.5/4.51/91.5/13.54.5/0.59/113.5/1.52.54.69.513.50.40.51.5VO(V)
|IO|VDD(µA)(V)
5101520510155101551015510155510155101518
TA = 25°CMin.
Typ.0.040.040.040.08
4.959.9514.95
0.050.050.053.5711
1.534
-1.6-0.51-1.3-3.4-0.51-1.3-3.4
-3.2-1-2.6-6.812.66.8±10-55
±0.17.5
-1.3-0.42-1.1-2.8-0.42-1.1-2.8
±1
3.5711
1.534
-1.3-0.42-1.1-2.8-0.42-1.1-2.8
±1
Max.51020100
4.959.9514.95
0.050.050.05
3.5711
1.534
Value-40 to 85°CMin.
Max.1503006003000
4.959.9514.95
0.050.050.05
-55 to 125°CMin.
Max.1503006003000
Unit
IL
Quiescent Current
µA
VOH
High Level Output Voltage
Low Level Output Voltage
High Level Input VoltageLow Level Input VoltageOutput Drive Current
VOL
VIH
VIL
IOH
IOL
Output Sink Current
Input Leakage Current
Input Capacitance
0/50/50/100/150/50/100/150/18
<1<1<1<1<1<1<1<1<1<1<1<1<1<1<1<1<1<1<1
V
V
V
V
mA
mAµApF
IICI
Any InputAny Input
The Noise Margin for both \"1\" and \"0\" level is: 1V min. with VDD=5V, 2V min. with VDD=10V, 2.5V min. with VDD=15V
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HCF4538B
DYNAMIC ELECTRICAL CHARACTERISTICS (Tamb = 25°C, CL = 50pF, RL = 200KΩ, tr = tf = 20 ns)
Test Condition
Symbol
Parameter
VDD (V)510155101551015510155101551015510155101551015Any Input
000
5
7.5
Min.
Value (*)Typ.10050403001501002501259580403060.658.959.19.979.9510.01.01.01.0± 1± 1± 1
nspF
Max.200100806003002005002501901408060.563.063.510.510.610.61.061.061.07
nsUnit
tTLH tTHLTransition Time
tPLH tPHLPropagation Delay Time
+TR or -TR to Q or QtPLH tPHLPropagation Delay Time Reset to Q or QtWH tWL
Minimum Input Pulse Width +TR, -TR or ResetOutput Pulse Width - Q or Q (CX = 0.005 µF, RX = 10KΩ )
tWT
Output Pulse Width - Q or Q (CX = 0.1µF, RX = 100KΩ)
Output Pulse Width - Q or Q (CX = 10µF, RX = 100KΩ)
Pulse Width Match
Between Circuits in Same Package : (100(T1 - T2)/T1) (CX = 0.1µF, RX = 100KΩ) Minimum Retrigger Time
(1)
ns
RL = 1KΩ
ns
RL = 1KΩ
5755559.49.49.50.950.950.96
ns
tWT
µs
ms
tWT
s
tW
%
trr
CIN
Input Capacitance
(*) Typical temperature coefficient for all VDD value is 0.3 %/°C.(1) Minimum RX value = 4KΩ , minimum CX value = 5000 pF
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HCF4538B
TEST CIRCUIT
CL = 50pF or equivalent (includes jig and probe capacitance)RL = 200KΩ
RT = ZOUT of pulse generator (typically 50Ω)
WAVEFORM : PROPAGATION DELAY TIMES (f=1MHz; 50% duty cycle)
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HCF4538BPlastic DIP-16 (0.25) MECHANICAL DATAmm.DIM.MIN.a1Bbb1DEee3FILZ3.31.278.52.5417.787.15.10.1300.0500.510.770.50.25200.3350.1000.7000.2800.2011.65TYPMAX.MIN.0.0200.0300.0200.0100.7870.065TYP.MAX.inchP001C8/10元器件交易网www.cecb2b.com
HCF4538BSO-16 MECHANICAL DATADIM.Aa1a2bb1Cc1DEee3FGLMS3.84.60.50.350.190.545° (typ.) 9.8100.3855.81.278.4.05.31.270.628°(max.)0.1490.1810.0196.20.2280.0500.3500.1570.2080.0500.0240.1mm.MIN.TYPMAX.1.750.21.650.460.250.0130.0070.0190.003MIN.inchTYP.MAX.0.0680.0070.00.0180.0100.3930.244PO13H9/10元器件交易网www.cecb2b.com
HCF4538B
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for theconsequences of use of such information nor for any infringement of patents or other rights of third parties which may result fromits use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specificationsmentioned in this publication are subject to change without notice. This publication supersedes and replaces all informationpreviously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices orsystems without express written approval of STMicroelectronics.
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