Datasheet

ManualsBrandsNXP SEMICONDUCTORS ManualsLogic ICsLogic IC - Multivibrator SMD 74 HC 4538 Monostable 25 ns SOIC 16

M54HC4538

M74HC4538

October 1993

DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR

B1R

(Plastic Package)

ORDER CODES :

M54HC4538F1R M74HC4538M1R

M74HC4538B1R M74HC4538C1R

F1R

(Ceramic Package)

M1R

(Micro Package)

C1R

(Chip Carrier)

PIN CONNECTIONS (top view)

NC =

No Internal

Connection

.HIGH SPEED

= 25 ns (TYP.) AT V

=5V

.LOW POWER DISSIPATION

STANDBY STATEI

=4µA(MAX.)ATT

=25°C

ACTIVE STATE I

=200µA(TYP.)ATV

=5V

.HIGH NOISE IMMUNITY

NIH

NIL

=28%V

(MIN.)

.OUTPUT DRIVE CAPABILITY

10 LSTTL LOADS

.BALANCEDPROPAGATION DELAYS

PLH

PHL

.WIDE OUTPUT PULSE WIDTH RANGE

WOUT

= 120 ns ~ 60 s OVER AT V

= 4.5 V

.OUTPUT PULSE WIDTH INDEPENDENT

FROM TRIGGER INPUT PULSE WIDTH

.PIN AND FUNCTION COMPATIBLE

WITH 4538B

The M54/74HC4538 is a high speed CMOS DUAL

MONOSTABLEMULTIVIBRATOR fabricated insili-

con gate C

MOS 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 whichcan be used as an in-

hibit input. Also included is a clear input that when

taken low resets the one shot. The monostable

multivibrators are retriggerable. That is,theymay be

triggered reapeatedly while their outputs are gener-

ating 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 volt-

age.

DESCRIPTION

1/14

Summary of content (14 pages)

PAGE 1
M54HC4538 M74HC4538 DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR . . . . . . . . HIGH SPEED tPD = 25 ns (TYP.) AT VCC = 5 V LOW POWER DISSIPATION STANDBY STATEICC =4 µA (MAX.) AT TA = 25 °C ACTIVE STATE ICC = 200 µA (TYP.) AT VCC = 5 V HIGH NOISE IMMUNITY VNIH = VNIL = 28 % VCC (MIN.) OUTPUT DRIVE CAPABILITY 10 LSTTL LOADS BALANCED PROPAGATION DELAYS tPLH = tPHL WIDE OUTPUT PULSE WIDTH RANGE tWOUT = 120 ns ~ 60 s OVER AT VCC = 4.
PAGE 2
M54/M74HC4538 SYSTEM DIAGRAM TIMING CHART 2/14
PAGE 3
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.
PAGE 4
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. 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.
PAGE 5
M54/ M74HC4538 ABSOLUTE MAXIMUM RATINGS Symbol Value Unit VCC VI Supply Voltage DC Input Voltage -0.5 to +7 -0.5 to VCC + 0.5 V V VO DC Output Voltage -0.5 to VCC + 0.
PAGE 6
M54/M74HC4538 DC SPECIFICATIONS Test Conditions Symbol VIH V IL Parameter High Level Input Voltage Low Level Input Voltage Value VCC (V) TA = 25 oC 54HC and 74HC Min. Typ. Max. 2.0 1.5 1.5 1.5 4.5 6.0 3.15 4.2 3.15 4.2 3.15 4.2 High Level Output Voltage 0.5 0.5 0.5 4.5 1.35 1.35 1.35 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.
PAGE 7
M54/ M74HC4538 AC ELECTRICAL CHARACTERISTICS (C L = 50 pF, Input t r = tf = 6 ns) Test Conditions o TA = 25 C 54HC and 74HC Value -40 to 85 oC -55 to 125 oC 74HC 54HC Symbol Parameter VCC (V) tTLH tTHL Output Transition Time 2.0 4.5 Typ. 30 8 Max. 75 15 tPLH tPHL Propagation Delay Time (A, B - Q, Q) 6.0 2.0 4.5 6.0 7 120 30 25 13 250 50 43 16 315 63 54 19 375 75 64 tPLH tPHL Propagation Delay Time (CD - Q, Q) tWOUT Output Pulse Width 2.0 4.5 6.0 2.0 4.
PAGE 8
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). 8/14 trr - VCC Characteristics (Typ).
PAGE 9
M54/ M74HC4538 SWITCHING CHARACTERISTICS TEST WAVEFORM 9/14
PAGE 10
M54/M74HC4538 Plastic DIP16 (0.25) MECHANICAL DATA mm DIM. MIN. a1 0.51 B 0.77 TYP. inch MAX. MIN. TYP. MAX. 0.020 1.65 0.030 0.065 b 0.5 0.020 b1 0.25 0.010 D 20 0.787 E 8.5 0.335 e 2.54 0.100 e3 17.78 0.700 F 7.1 0.280 I 5.1 0.201 L Z 3.3 0.130 1.27 0.
PAGE 11
M54/ M74HC4538 Ceramic DIP16/1 MECHANICAL DATA mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 20 0.787 B 7 0.276 D E 3.3 0.130 0.38 e3 0.015 17.78 0.700 F 2.29 2.79 0.090 0.110 G 0.4 0.55 0.016 0.022 H 1.17 1.52 0.046 0.060 L 0.22 0.31 0.009 0.012 M 0.51 1.27 0.020 0.050 N P Q 10.3 7.8 8.05 5.08 0.406 0.307 0.317 0.
PAGE 12
M54/M74HC4538 SO16 (Narrow) MECHANICAL DATA mm DIM. MIN. TYP. A a1 inch MAX. MIN. TYP. 1.75 0.1 0.068 0.2 a2 MAX. 0.004 0.007 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.5 0.019 c1 45° (typ.) D 9.8 E 5.8 10 0.385 6.2 0.228 0.393 0.244 e 1.27 0.050 e3 8.89 0.350 F 3.8 4.0 0.149 0.157 G 4.6 5.3 0.181 0.208 L 0.5 1.27 0.019 0.050 M S 0.62 0.024 8° (max.
PAGE 13
M54/ M74HC4538 PLCC20 MECHANICAL DATA mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 9.78 10.03 0.385 0.395 B 8.89 9.04 0.350 0.356 D 4.2 4.57 0.165 0.180 d1 2.54 0.100 d2 0.56 0.022 E 7.37 8.38 0.290 0.330 e 1.27 0.050 e3 5.08 0.200 F 0.38 0.015 G 0.101 0.004 M 1.27 0.050 M1 1.14 0.
PAGE 14
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.