DATA SH EET
Product specification
File under Integrated Circuits, IC04 January 1995
INTEGRATED CIRCUITS
HEF4528B
MSI
Dual monostable multivibrator
For a complete data sheet, please also download:
The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC
The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC
January 1995 2
Philips Semiconductors Product specification
Dual monostable multivibrator HEF4528B
MSI
DESCRIPTION
The HEF4528B is a dual retriggerable-resettable
monostable multivibrator. Each multivibrator has an active
LOW input (I0), and active HIGH input (I1), an active LOW
clear direct input (CD), an output (O) and its complement
(O), and two pins for connecting the external timing
components (CTC(1), RCTC).
An external timing capacitor (Ct) must be connected
between CTC and RCTC and an external resistor (Rt) must
be connected between RCTC and VDD. The duration of the
(1) Always connected to ground.
output pulse is determined by the external timing
components Ct and Rt.
A HIGH to LOW transition on I0 when I1is LOW or a LOW
to HIGH transition on I1when I0is HIGH produces a
positive pulse (LOW-HIGH-LOW) and O and a negative
pulse (HIGH-LOW-HIGH) on O if the CDis HIGH. A LOW
on CDforces O LOW, O HIGH and inhibits any further
pulses until CDis HIGH.
Fig.1 Functional diagram.
PINNING
FAMILY DATA, IDD LIMITS category MSI
See Family Specifications
HEF4528BP(N): 16-lead DIL; plastic (SOT38-1)
HEF4528BD(F): 16-lead DIL; ceramic (cerdip) (SOT74)
HEF4528BT(D): 16-lead SO; plastic (SOT109-1)
( ): Package Designator North America
I0A, I0B input (HIGH to LOW triggered)
I1A, I1B input (LOW to HIGH triggered)
CDA, CDB clear direct input (active LOW)
OA, OBoutput
OA, OBcomplementary output (active LOW)
CTC A, CTC B external capacitor connections (1)
RCTC A,external capacitor/ resistor connections
RCTC B
Fig.2 Pinning diagram.
January 1995 3
Philips Semiconductors Product specification
Dual monostable multivibrator HEF4528B
MSI
Fig.3 Logic diagram (one monostable multivibrator).
January 1995 4
Philips Semiconductors Product specification
Dual monostable multivibrator HEF4528B
MSI
FUNCTION TABLE
Notes
1. H = HIGH state (the more positive voltage)
2. L = LOW state (the less positive voltage)
3. X = state is immaterial
4. = positive-going transition
5. = negative-going transition
6. = positive or negative output pulse; width is determined by Ctand Rt
AC CHARACTERISTICS
VSS =0V; T
amb =25°C; CL= 50 pF; input transition times 20 ns
INPUTS OUTPUTS
I0I1CDO O
LH
HH
XXLLH
V
DD
VSYMBOL MIN. TYP. MAX. TYPICAL EXTRAPOLATION
FORMULA
Propagation delays
I0, I1O 5 140 280 ns 113 ns +(0,55 ns/pF) CL
HIGH to LOW 10 tPHL 50 100 ns 39 ns +(0,23 ns/pF) CL
15 35 70 ns 27 ns +(0,16 ns/pF) CL
I0, I1O 5 155 305 ns 128 ns +(0,55 ns/pF) CL
LOW to HIGH 10 tPLH 60 115 ns 49 ns +(0,23 ns/pF) CL
15 40 80 ns 32 ns +(0,16 ns/pF) CL
CDO 5 105 210 ns 78 ns +(0,55 ns/pF) CL
HIGH to LOW 10 tPHL 40 85 ns 29 ns +(0,23 ns/pF) CL
15 30 60 ns 22 ns +(0,16 ns/pF) CL
CDO 5 120 240 ns 93 ns +(0,55 ns/pF) CL
LOW to HIGH 10 tPLH 50 105 ns 39 ns +(0,23 ns/pF) CL
15 35 70 ns 27 ns +(0,16 ns/pF) CL
Output transition 5 60 120 ns 10 ns +(1,0 ns/pF) CL
times 10 tTHL 30 60 ns 9 ns +(0,42 ns/pF) CL
HIGH to LOW 15 20 40 ns 6 ns +(0,28 ns/pF) CL
5 60 120 ns 10 ns +(1,0 ns/pF) CL
LOW to HIGH 10 tTLH 30 60 ns 9 ns +(0,42 ns/pF) CL
15 20 40 ns 6 ns +(0,28 ns/pF) CL
January 1995 5
Philips Semiconductors Product specification
Dual monostable multivibrator HEF4528B
MSI
AC CHARACTERISTICS
VSS = 0 V; Tamb =25°C; input transition times 20 ns; Rt=5k;C
t=15pF
AC CHARACTERISTICS
VSS =0V; T
amb =25°C; CL= 50 pF; input transition times 20 ns; see also waveforms Fig.5.
VDD
VTYPICAL FORMULA FOR P (µW)
Dynamic power 5 4000 fi+∑(foCL)×VDD2where
dissipation per 10 20 000 fi+∑(foCL)×VDD2fi= input freq. (MHz)
package (P) 15 59 000 fi+∑(foCL)×VDD2fo= output freq. (MHz)
CL= load capacitance (pF)
(foCL) = sum of outputs
VDD = supply voltage (V)
VDD
VSYMBOL MIN. TYP. MAX.
Recovery time 5 0 75 ns
for CD10 tRCD 030 ns
15 0 25 ns
Minimum I055025ns
pulse width; LOW 10 tWI0L 30 15 ns
15 20 10 ns
Minimum I155025ns
pulse width; HIGH 10 tWI1H 30 15 ns
15 20 10 ns
Minimum CD56030ns
pulse width; LOW 10 tWCDL 35 15 ns
15 25 10 ns
Set-up time 5 0 105 ns to avoid change
in output
CDI0or I110 tsu 040 ns
15 0 25 ns
Output O pulse 5 235 ns note 1width; HIGH 10 tWOH 155 ns
15 140 ns
Output O pulse 5 5,45 µsnote 2width; HIGH 10 tWOH 4,95 µs
15 4,85 µs
Change in output O 5 −±3%
note 3pulse width over 10 tWO −±2%
temperature 15 −±2%
Change in output O 5 −±2%
V
DD ±5%pulse width over 10 tWO −±1%
V
DD 15 −±1%
January 1995 6
Philips Semiconductors Product specification
Dual monostable multivibrator HEF4528B
MSI
Notes
1. Rt=5k;C
t= 15 pF; for other Rt,C
tcombinations and Ct<0,01 µF see graph Fig.4.
2. Rt=10k;C
t= 1000 pF; for other Rt,C
tcombinations and Ct>0,01 µF use formula tWO = K.Rt.Ct.
where: tWO = output pulse width (s)
Rt= external timing resistor ()
Ct= external timing capacitor (F)
K = 0,42 for VDD =5V
K = 0,32 for VDD =10V
K = 0,30 for VDD =15V
3. Tamb =40 to +85 °C; tWO is referenced to tWO at Tamb =25°C.
External timing 5 5 2000 k
resistor 10 Rt52000 k
15 5 2000 k
External timing 5 no limits
capacitor 10 Ctno limits
15 no limits
VDD
VSYMBOL MIN. TYP. MAX.
January 1995 7
Philips Semiconductors Product specification
Dual monostable multivibrator HEF4528B
MSI
Fig.4 Output pulse width (tWO) as a function of external timing capacitor (Ct).
January 1995 8
Philips Semiconductors Product specification
Dual monostable multivibrator HEF4528B
MSI
APPLICATION INFORMATION
An example of an application for the HEF4528B is:
Non-retriggerable monostable multivibrator
Fig.5 Waveforms showing minimum I0, I1 and O pulse widths, set-up and recovery times. Set-up and recovery
times are shown as positive values but may be specified as negative values.
Fig.6 Two examples for a non-retriggerable monostable multivibrator using half of HEF4528B (LOW to HIGH
and HIGH to LOW triggered).