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M54HC4538 M74HC4538
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR
.HI .LOWPOWERDI .HI .OUTPUTDRI .BALANCEDPROPAGATI .WI .OUTPUT .PI
GH SPEED tPD = 25 ns (TYP.) AT VCC = 5 V SSIPATION STANDBY STATEICC =4 A (MAX.) AT TA = 25 C ACTIVE STATE ICC = 200 A (TYP.) AT VCC = 5 V GH NOISE IMMUNITY VNIH = VNIL = 28 % VCC (MIN.) VE CAPABILITY 10 LSTTL LOADS ON DELAYS tPLH = tPHL DE OUTPUT PULSE WIDTH RANGE tWOUT = 120 ns ~ 60 s OVER AT VCC = 4.5 V PULSE WIDTH INDEPENDENT FROM TRIGGER INPUT PULSE WIDTH N AND FUNCTION COMPATIBLE WITH 4538B
B1R (Plastic Package)
F1R (Ceramic Package)
M1R (Micro Package)
C1R (Chip Carrier)
ORDER CODES : M54HC4538F1R M74HC4538M1R M74HC4538B1R M74HC4538C1R
PIN CONNECTIONS (top view)
DESCRIPTION The M54/74HC4538 is a high speed CMOS DUAL MONOSTABLEMULTIVIBRATOR fabricated in silicon gate C2MOS technology. It has the same high speed performance of LSTTL combined with true CMOS low power consumption. Each multivibrator features both a negative, A, and a positive, B, edge triggered input, either of which can be used as an inhibit input. Also included is a clear input that when taken low resets the one shot. The monostable multivibrators are retriggerable. That is, they may be triggered reapeatedly while their outputs are generating a pulse and the pulse will be extended. Pulse width stability over a wide range of temperature and supply is achieved using linear CMOS techniques. The output pulse equation is simply : PW = 0.7 (R)(C) where PW is in seconds, R in Ohms, and C is in Farads. All inputs are equipped with protection circuits against static discharge and transient excess voltage.
October 1993
NC = No Internal Connection
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M54/M74HC4538
SYSTEM DIAGRAM
TIMING CHART
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M54/ M74HC4538
BLOCK DIAGRAM
Notes : 1. Cx, Rx, Dx are external components. 2. Dx is a clamping diode. 3. The external capacitor is charged to VCC in the stand-by state, i.e. no trigger. When the supply voltage is turned off Cx is discharged mainlythrough an internal parasitic diode (see figures). IfCx is sufficiently largeand VCC decreases rapidy, there willbesome possibility of damaging the I.C. with a surge current or latch-up. If the voltage supply filter capacitor is large enough and VCC decrease slowly, the surge current is automatically limited and damage the I.C. is avoided. The maximum forward current of the parasitic diode is approximately 20 mA. In cases where Cx is large the time taken for the supply voltage to fall to 0.4 VCC can be calculated as follows : tf (VCC - 0.7) Cx/20 mA In cases where tf is too short an external champing diode is required to protect the I.C. from the surge current.
FUNCTIONAL DESCRIPTION STAND-BY STATE The external capacitor, Cx, is fully charged to VCC in the stand-by state. Hence, before triggering, transistor Qp and Qn (connected to the Rx/Cx node) are both turned off. The two comparators that control the timing and the two reference voltage sources stop operating. The total supply current is therefore only leakage current. TRIGGER OPERATION Triggering occurs when : 1 st) A is "low" and B has a falling edge ; 2 nd) B is "high" and A has a rising edge ; After the multivibrator has been retriggered comparator C1 and C2 start operating and Qn is turned on. Cx then discharges through Qn. The voltage at the node Rx/Cx external falls. When it reaches VREFL the output of comparator C1 becomes low. This in turn resets the flip-flop and Qn is turned off. At this point C1 stops functioning but C2 continues to operate. The voltage at R/C external begins to rise with a time constant set by the external components Rx, Cx. Triggering the multivibrator causes Q to go high after internal delay due to the flip-flop and the gate. Q remains high until the voltage at R/C external rises again to VREFH. At this point C2 output goes low and G goes low. C2 stops operating. That means that after triggering when the voltage at R/C external returns to VREFH the multivibrator has returned to its MONOSTABLE STATE. In the case where Rx * Cx are large enough and the discharge time of the capacitor and the delay time in the I.C. can be ignored, the width of the output pulse tw (out) is as follows : tW(OUT) = 0.72 Cx * Rx RE-TRIGGER OPERATION When a second trigger pulse follows the first its effect will depend on the state of the multivibrator. If the capacitor Cx is being charged the voltage level of Rx/Cx external falls to VREFL again and Q remains high i.e. the retrigger pulse arrives in a time shorter than the period Rx * Cx seconds, the capacitor charging time constant. If the second trigger pulse is very close to the initial trigger pulse it is ineffective ; i.e., the second trigger must arrive in the capacitor discharge cycle to be ineffective. Hence the minimum time for a second trigger to be effective, trr (Min.) depends on VCC and Cx.
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M54/M74HC4538
FUNCTIONAL DESCRIPTION (continued) RESET OPERATION CD is normally high. If CD is low, the trigger is not effective because Q output goes low and trigger control flip-flop is reset. TRUTH TABLE
A X H L X X INPUTS B H L X OUTPUTS CD H H H H L L H L L H H Q Q NOTE OUTPUT ENABLE INHIBIT INHIBIT OUTPUT ENABLE INHIBIT
Also transistor Op is turned on and Cx is charged quicky to VCC. This means if CD input goes low, the IC becomes waiting state both in operating and non operating state.
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No 1, 15 2, 14 3, 13 4, 12 5, 11 6, 10 7, 9 8 16 SYMBOL 1T1, 2T1 1T2, 2T2 1CD, 2CD 1A, 2A 1B, 2B Q1, Q2 Q1, Q2 GND VCC NAME AND FUNCTION External Capacitor Connections External Resistor/Capacitor Connections Direct Reset Inputs (Active LOW) Trigger Inputs (LOW to HIGH, Edge-Triggered) Trigger Inputs (HIGH to LOW, Edge-Triggered) Pulse Outputs Complementary Pulse Outputs Ground (0V) Positive Supply Voltage
IEC LOGIC SYMBOL
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M54/ M74HC4538
ABSOLUTE MAXIMUM RATINGS
Symbol VCC VI VO IIK IOK IO ICC or IGND PD Tstg TL Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Source Sink Current Per Output Pin DC VCC or Ground Current Power Dissipation Storage Temperature Lead Temperature (10 sec) Parameter Value -0.5 to +7 -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 20 20 25 50 500 (*) -65 to +150 300 Unit V V V mA mA mA mA mW
o o
C C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition isnotimplied. (*) 500 mW: 65 oC derate to 300 mW by 10mW/oC: 65 oC to 85 oC
RECOMMENDED OPERATING CONDITIONS
Symbol VCC VI VO Top tr, tf Parameter Supply Voltage Input Voltage Output Voltage Operating Temperature: M54HC Series M74HC Series Input Rise and Fall Time (CLR only) Value 2 to 6 0 to VCC 0 to VCC -55 to +125 -40 to +85 0 to 1000 0 to 500 0 to 400 NO LIMITATION (*) VCC 3 V VCC > 3 V 5K to 1M (*) 1K to 1M (*) Unit V V V C o C
o
VCC = 2 V VCC = 4.5 V VCC = 6 V
ns
CX RX
External Capacitor External Resistor
(*) The maximum allowable values of Cx and Rx are a function of leakage of capacitor Cx, the leakage of device and leakage due to the board layout and surface resistance. Susceptibility to externally induced noise may occur for Rx > 1M
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M54/M74HC4538
DC SPECIFICATIONS
Test Conditions Symbol Parameter VCC (V) 2.0 4.5 6.0 2.0 4.5 6.0 V OH High Level Output Voltage 2.0 4.5 6.0 4.5 VOL Low Level Output Voltage 6.0 2.0 4.5 6.0 4.5 6.0 II II ICC ICC Input Leakage Current Input Leakage Current Quiescent Supply Current Quiescent Supply Current 6.0 6.0 6.0 2.0 4.5 6.0 VI = IO=-20 A VIH or V IL IO=-4.0 mA IO=-5.2 mA VI = IO= 20 A VIH or V IL IO= 4.0 mA IO= 5.2 mA VI = VCC or GND VI = VCC or GND Rext/Cext VI = VCC or GND VI = VCC or GND pins 2, 14 V I = V CC/2 40 0.2 0.3 1.9 4.4 5.9 4.18 5.68 2.0 4.5 6.0 4.31 5.8 0.0 0.0 0.0 0.17 0.18 0.1 0.1 0.1 0.26 0.26 0.1 0.1 4 120 0.3 0.6 TA = 25 oC 54HC and 74HC Min. Typ. Max. 1.5 3.15 4.2 0.5 1.35 1.8 1.9 4.4 5.9 4.13 5.63 0.1 0.1 0.1 0.37 0.37 1 1 40 160 0.4 0.8 Value -40 to 85 oC -55 to 125 oC 74HC 54HC Min. Max. Min. Max. 1.5 3.15 4.2 0.5 1.35 1.8 1.9 4.4 5.9 4.10 5.60 0.1 0.1 0.1 0.40 0.40 1 1 80 A A A A mA mA V V 1.5 3.15 4.2 0.5 1.35 1.8 V V Unit
VIH
High Level Input Voltage Low Level Input Voltage
V IL
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M54/ M74HC4538
AC ELECTRICAL CHARACTERISTICS (C L = 50 pF, Input t r = tf = 6 ns)
Test Conditions Symbol Parameter VCC (V) 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 tWOUT Output Pulse Width Error Between Circuits (In same pack) Minimum Pulse Width (CLOCK) Minimum Pulse Width (CLEAR) Minimum Clear Removal Time Minimum Retrigger Time TA = 25 C 54HC and 74HC Min. Typ. 30 8 7 120 30 25 100 25 20 540 180 70 69 69 0.67 0.67 0.67 150 83 77 77 0.75 0.73 0.73 1 % 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 30 8 7 30 8 7 0 0 0 380 92 72 6 1.4 1.2 5 70 10 10 10 75 15 13 75 15 13 15 5 5 95 19 16 95 19 16 15 5 5 110 22 19 110 22 19 20 7 6 ns ns Max. 75 15 13 250 50 43 195 39 33 1200 250 200 96 85 85 0.83 0.77 0.77 70 69 69 0.67 0.67 0.67
o
Value -40 to 85 oC -55 to 125 oC 74HC 54HC Min. Max. 95 19 16 315 63 54 245 49 42 1500 320 260 96 85 85 0.83 0.77 0.77 70 69 69 0.67 0.67 0.67 Min. Max. 110 22 19 375 75 64 295 59 50 1800 375 320 96 85 85 0.9 0.8 0.8
Unit
tTLH tTHL tPLH tPHL tPLH tPHL tWOUT
Output Transition Time Propagation Delay Time (A, B - Q, Q) Propagation Delay Time (CD - Q, Q) Output Pulse Width
ns
ns
ns
RX = 5K CX = 0 RX = 1K RX = 1K CX = 0.01 F RX = 10K CX = 0.1 F RX = 10K
ns
s
ms
tW(H) tW(L) tW(L)
ns
tREM
ns
ts
CX = 0.1 F RX = 1K CX = 0.01 F RX = 1K
s pF pF
CIN CPD (*)
Input Capacitance Power Dissipation Capacitance
(*) CPD is defined as the value of the IC's internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operting current can be obtained by the following equation. ICC(opr) = CPD *VCC *fIN + ICC` *Duty/100 + ICC/2 (per circuit) (ICC` = Active Supply Current) (Duty = %))
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M54/M74HC4538
TEST CIRCUIT ICC (Opr.) Output Pulse Width Constant K = Supply Voltage.
INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF SWITCHING CHARACTERISTICS TEST.
tWOUT - Cx Characteristics (Typ).
trr - VCC Characteristics (Typ).
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M54/ M74HC4538
SWITCHING CHARACTERISTICS TEST WAVEFORM
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M54/M74HC4538
Plastic DIP16 (0.25) MECHANICAL DATA
mm MIN. a1 B b b1 D E e e3 F I L Z 3.3 1.27 8.5 2.54 17.78 7.1 5.1 0.130 0.050 0.51 0.77 0.5 0.25 20 0.335 0.100 0.700 0.280 0.201 1.65 TYP. MAX. MIN. 0.020 0.030 0.020 0.010 0.787 0.065 inch TYP. MAX.
DIM.
P001C
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M54/ M74HC4538
Ceramic DIP16/1 MECHANICAL DATA
mm MIN. A B D E e3 F G H L M N P Q 7.8 2.29 0.4 1.17 0.22 0.51 0.38 17.78 2.79 0.55 1.52 0.31 1.27 10.3 8.05 5.08 0.307 0.090 0.016 0.046 0.009 0.020 3.3 0.015 0.700 0.110 0.022 0.060 0.012 0.050 0.406 0.317 0.200 TYP. MAX. 20 7 0.130 MIN. inch TYP. MAX. 0.787 0.276
DIM.
P053D
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M54/M74HC4538
SO16 (Narrow) MECHANICAL DATA
DIM. MIN. A a1 a2 b b1 C c1 D E e e3 F G L M S 3.8 4.6 0.5 9.8 5.8 1.27 8.89 4.0 5.3 1.27 0.62 8 (max.) 0.149 0.181 0.019 10 6.2 0.35 0.19 0.5 45 (typ.) 0.385 0.228 0.050 0.350 0.157 0.208 0.050 0.024 0.393 0.244 0.1 mm TYP. MAX. 1.75 0.2 1.65 0.46 0.25 0.013 0.007 0.019 0.004 MIN. inch TYP. MAX. 0.068 0.007 0.064 0.018 0.010
P013H
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M54/ M74HC4538
PLCC20 MECHANICAL DATA
mm MIN. A B D d1 d2 E e e3 F G M M1 1.27 1.14 7.37 1.27 5.08 0.38 0.101 0.050 0.045 9.78 8.89 4.2 2.54 0.56 8.38 0.290 0.050 0.200 0.015 0.004 TYP. MAX. 10.03 9.04 4.57 MIN. 0.385 0.350 0.165 0.100 0.022 0.330 inch TYP. MAX. 0.395 0.356 0.180
DIM.
P027A
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M54/M74HC4538
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express written approval of SGS-THOMSON Microelectonics. (c) 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A
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