933507970652 [NXP]
IC 4000/14000/40000 SERIES, DUAL MONOSTABLE MULTIVIBRATOR, PDSO16, PLASTIC, SOT-109-1, SO-16, Prescaler/Multivibrator;
| 型号： | 933507970652 |
| 厂家： | 
NXP |
| 描述： | IC 4000/14000/40000 SERIES, DUAL MONOSTABLE MULTIVIBRATOR, PDSO16, PLASTIC, SOT-109-1, SO-16, Prescaler/Multivibrator 时钟 光电二极管 逻辑集成电路 |
| 文件： | 总8页 (文件大小：100K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
DATA SHEET
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
HEF4538B
MSI
Dual precision monostable
multivibrator
January 1995
Product specification
File under Integrated Circuits, IC04
Philips Semiconductors
Product specification
HEF4538B
MSI
Dual precision monostable multivibrator
accurate output pulse with a pulse width range of 10 µs to
infinity. The duration and accuracy of the output pulse are
determined by the external timing components Ct and Rt.
The output pulse width (T) is equal to Rt × Ct. The linear
design techniques in LOCMOS guarantee precise control
of the output pulse width.
DESCRIPTION
The HEF4538B is a dual retriggerable-resettable
monostable multivibrator. Each multivibrator has an active
LOW trigger/retrigger input (I0), an active HIGH
trigger/retrigger input (I1), an overriding active LOW direct
reset input (CD), an output (O) and its complement (O),
and two pins (CTC,
(1) RCTC) for connecting the external
A LOW level at CD terminates the output pulse
immediately. Schmitt-trigger action in the trigger inputs
makes the circuit highly tolerant to slower rise and fall
times.
timing components Ct and Rt. Typical pulse width variation
over temperature range is ± 0,2%.
The HEF4538B may be triggered by either the positive or
the negative edges of the input pulse and will produce an
Fig.2 Pinning diagram.
HEF4538BP(N): 16-lead DIL; plastic (SOT38-1)
HEF4538BD(F): 16-lead DIL; ceramic (cerdip) (SOT74)
HEF4538BT(D): 16-lead SO; plastic (SOT109-1)
( ): Package Designator North America
PINNING
I0A, 0B
I
input (HIGH to LOW triggered)
input (LOW to HIGH triggered)
direct reset input (active LOW)
output
I1A, I1B
CDA, CDB
OA, OB
OA, OB
complementary output (active LOW)
external capacitor connections(1)
CTC A, CTC B
RCTC A, RCTC B external capacitor/ resistor
connections
Note
1. Always connected to ground.
Fig.1 Functional diagram.
FAMILY DATA, IDD LIMITS category MSI
See Family specifications.
January 1995
2
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Fig.3 Logic diagram.
Philips Semiconductors
Product specification
HEF4538B
MSI
Dual precision monostable multivibrator
FUNCTION TABLE
INPUTS
OUTPUTS
I0
I1
CD
H
O
O
L
H
X
H
X
L
L
H
Notes
1. H = HIGH state (the more positive voltage)
L = LOW state (the less positive voltage)
X = state is immaterial
= positive output pulse
= negative output pulse
= positive-going transition
= negative-going transition
Fig.4 Connection of the external timing
components Rt and Ct.
DC CHARACTERISTICS
VSS = 0 V
Tamb (°C)
VDD
V
SYMBOL
− 40
MAX.
+ 25
TYP.
55
+ 85
TYP.
MAX.
TYP.
MAX.
Supply current
active state
(see note)
5
10
15
µA
µA
µA
ID
150
220
Input leakage
current
15
± IIN
300
1000 nA
(pins 2 and 14)
Note
1. Only one monostable is switching: current present during output pulse (output O is HIGH).
January 1995
4
Philips Semiconductors
Product specification
HEF4538B
MSI
Dual precision monostable multivibrator
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns
VDD
V
TYPICAL EXTRAPOLATION
FORMULA
SYMBOL
MIN.
TYP.
MAX.
Propagation delays
I0, I1 → O
HIGH to LOW
5
200
460 ns
173 ns + (0,55 ns/pF) CL
79 ns + (0,23 ns/pF) CL
52 ns + (0,16 ns/pF) CL
193 ns + (0,55 ns/pF) CL
74 ns + (0,23 ns/pF) CL
52 ns + (0,16 ns/pF) CL
98 ns + (0,55 ns/pF) CL
44 ns + (0,23 ns/pF) CL
32 ns + (0,16 ns/pF) CL
98 ns + (0,55 ns/pF) CL
44 ns + (0,23 ns/pF) CL
32 ns + (0,16 ns/pF) CL
10
15
5
tPHL
tPLH
tPHL
tPLH
tRCD
tRO
90
60
180 ns
120 ns
440 ns
190 ns
120 ns
250 ns
110 ns
80 ns
250 ns
110 ns
80 ns
40 ns
20 ns
10 ns
ns
I0, I1 → O
LOW to HIGH
220
85
10
15
5
60
CD → O
HIGH to LOW
125
55
10
15
5
40
CD → O
LOW to HIGH
125
55
10
15
5
40
Recovery times
20
CD → I0, I1
10
15
5
10
5
Retrigger times
0
0
O, O → I0, I1
10
15
5
ns
0
ns
Minimum I0
90
45
ns
pulse width; LOW
10
15
5
tWI0L
tWI1H
tWCDL
tWO
30
15
12
ns
24
ns
Minimum I1
50
25
ns
pulse width; HIGH
10
15
5
24
12
ns
20
10
ns
Minimum CD
55
25
ns
pulse width; LOW
10
15
5
25
12
ns
20
10
ns
Output O or O
pulse width
218
213
211
10,3
10,2
10,1
230
224
223
10,8
10,7
10,6
242
µs
Rt = 100 kΩ
Ct = 0,002 µF
10
15
5
235
234
11,3
11,2
11,1
µs
µs
Output O or O
pulse width
ms
ms
ms
Rt = 100 kΩ
Ct = 0,1 µF
10
15
5
tWO
Output O or O
pulse width
1,01
1,09
1,11 s
Rt = 100 kΩ
Ct = 10 µF
10
15
tWO
0,99
0,99
1,04
1,04
1,09 s
1,09 s
January 1995
5
Philips Semiconductors
Product specification
HEF4538B
MSI
Dual precision monostable multivibrator
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns
VDD
V
SYMBOL
MIN.
TYP.
MAX.
Change in output O
5
10
15
± 0,2
± 0,2
± 0,2
%
%
%
pulse width over
temperature (Tamb
Change in output O
pulse width over
∆tWO
)
∆tWO
∆tWO
Rt
± 1,5
%
VDD range 5 to 15 V
Pulse width variation
between circuits
in same package
External timing
resistor
5
10
15
± 1
± 1
± 1
%
%
%
Rt = 100 kΩ
Ct = 2 nF to 10 µF
(1)
5
−
−
kΩ
pF
pF
External timing
capacitor
Ct
2000
no limits
Input capacitance
(pin 2 or 14)
CIN
15
Note
1. The maximum permissible resistance Rt , which holds the specified accuracy of tWO, depends on the leakage current
of the capacitor Ct and the leakage of the HEF4538B.
January 1995
6
Philips Semiconductors
Product specification
HEF4538B
MSI
Dual precision monostable multivibrator
Fig.5 Waveforms showing minimum I0, I1, O and CD pulse widths, recovery times and propagation delays.
(1) Positive edge triggering.
(2) Positive edge re-triggering (pulse lengthening).
(3) Negative edge triggering.
(4) Reset (pulse shortening).
(5) T = Rt × Ct.
Fig.6 Timing diagram.
January 1995
7
Philips Semiconductors
Product specification
HEF4538B
MSI
Dual precision monostable multivibrator
(a) Rt = 100 kΩ; Ct = 100 nF..
(b) Rt = 100 kΩ; Ct = 2 nF.
Fig.7 Typical normalized change in output pulse width as a function of ambient temperature; 0% at
VDD = 10 V and Tamb = 25 °C.
Fig.8 Typical normalized change in output pulse
width as a function of the supply voltage at
Tamb = 25 °C; 0% at
Fig.9 Total supply current as a function of the
output duty factor; Rt = 100 kΩ;
Ct = 100 nF; CL = 50 pF. One monostable
multivibrator switching only.
VDD = 10 V; Rt = 100 kΩ.
January 1995
8
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