HEF4538BT Fast Delivery |IC PHOENIX CO.,LIMITED

HEF4538BT ,Dual precision monostable multivibratorLogic diagram (one multivibrator)5. Pinning information5.1 Pinning HEF4538B1CEXT 1 16 VDD2 151REXT/ ..
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HEF4538BT
Dual precision monostable multivibrator
1. General description
The HEF4538B is a dual retriggerable-resettable monostable multivibrator. Each
multivibrator has an active LOW trigger/retrigger input (nA), an active HIGH
trigger/retrigger input (nB), an overriding active LOW direct reset input (nCD), an output
(nQ) and its complement (nQ), and two pins (nREXT/CEXT, and nCEXT, always
connected to ground) for connecting the external timing components CEXT and REXT.
Typical pulse width variation over the specified temperature range is 0.2 %.
The multivibrator may be triggered by either the positive or the negative edges of the input
pulse and will produce an accurate output pulse with a pulse width range of 10 s to
infinity. The duration and accuracy of the output pulse are determined by the external
timing components CEXT and REXT. The output pulse width (tW) is equal to REXT CEXT.
The linear design techniques in LOCMOS (Local Oxide CMOS) guarantee precise control
of the output pulse width. A LOW level at nCD terminates the output pulse immediately.
The trigger inputs’ Schmitt trigger action makes the circuit highly tolerant of slower rise
and fall times.
It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS
(usually ground). Unused inputs must be connected to VDD, VSS, or another input.
2. Features and benefits Tolerant of slow trigger rise and fall times Fully static operation 5 V, 10 V, and 15 V parametric ratings Standardized symmetrical output characteristics Specified from 40 C to +85 C and 40 C to +125 C Complies with JEDEC standard JESD 13-B
3. Ordering information
HEF4538B
Dual precision monostable multivibrator
Rev. 9 — 10 December 2013 Product data sheet
Table 1. Ordering information
All types operate from 40 C to +125 C.
HEF4538BP DIP16 plastic dual in-line package; 16 leads (300 mil) SOT38-4
HEF4538BT SO16 plastic small outline package; 16 leads; body width 3.9 mm SOT109-1
NXP Semiconductors HEF4538B
Dual precision monostable multivibrator
4. Functional diagram
NXP Semiconductors HEF4538B
Dual precision monostable multivibrator
5. Pinning information
5.1 Pinning
NXP Semiconductors HEF4538B
Dual precision monostable multivibrator
5.2 Pin description
6. Functional description
[1] H = HIGH voltage level; L = LOW voltage level; X = don’t care;
 = positive-going transition; = negative-going transition; and REXT; and REXT.
Table 2. Pin description
1CEXT, 2CEXT 1, 15 external capacitor connection (always connected to ground)
1REXT/CEXT, 2REXT/CEXT 2, 14 external capacitor/resistor connection
1CD, 2CD 3, 13 direct reset input (active LOW)
1B, 2B 4, 12 input (LOW-to-HIGH triggered)
1A, 2A 5, 11 input (HIGH-to-LOW triggered)
1Q, 2Q 6, 10 output
1Q, 2Q 7, 9 complementary output (active LOW)
VSS 8 ground supply voltage
VDD 16 supply voltage
Table 3. Function table LH  H
XXL L H
NXP Semiconductors HEF4538B
Dual precision monostable multivibrator
7. Limiting values
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to VSS = 0 V (ground)
VDD supply voltage 0.5 +18 V
IIK input clamping current VI < 0.5 V or VI > VDD + 0.5V - 10 mA input voltage 0.5 VDD + 0.5 V
IOK output clamping current VI < 0.5 V or VI > VDD + 0.5V - 10 mA
II/O input/output current - 10 mA
IDD supply current - 50 mA
Tstg storage temperature 65 +150 C
NXP Semiconductors HEF4538B
Dual precision monostable multivibrator
[1] For DIP16 package: Ptot derates linearly with 12 mW/K above 70 C.
[2] For SO16 package: Ptot derates linearly with 8 mW/K above 70 C.
8. Recommended operating conditions
9. Static characteristics
Tamb ambient temperature 40 +125 C
Ptot total power dissipation Tamb = 40 C to +125 C
DIP16 package [1] -750 mW
SO16 package [2] -500 mW power dissipation per output - 100 mW
Table 4. Limiting values …continued
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to VSS = 0 V (ground)
Table 5. Recommended operating conditions
VDD supply voltage 3 - 15 V input voltage 0 - VDD V
Tamb ambient temperature in free air 40 - +125 C
t/V input transition rise and fall rate VDD = 5 V --3.75 s/V
VDD = 10 V --0.5 s/V
VDD = 15 V --0.08 s/V
Table 6. Static characteristics
VSS = 0 V; VI = VSS or VDD unless otherwise specified.
VIH HIGH-level
input voltage IO < 1 A 5 V 3.5 - 3.5 - 3.5 - 3.5 - V
10 V 7.0 - 7.0 - 7.0 - 7.0 - V
15 V 11.0 - 11.0 - 11.0 - 11.0 - V
VIL LOW-level
input voltage IO < 1 A 5 V - 1.5 - 1.5 - 1.5 - 1.5 V
10 V - 3.0 - 3.0 - 3.0 - 3.0 V
15 V - 4.0 - 4.0 - 4.0 - 4.0 V
VOH HIGH-level
output voltage IO < 1 A 5 V 4.95 - 4.95 - 4.95 - 4.95 - V
10 V 9.95 - 9.95 - 9.95 - 9.95 - V
15 V 14.95 - 14.95 - 14.95 - 14.95 - V
VOL LOW-level
output voltage IO < 1 A 5 V - 0.05 - 0.05 - 0.05 - 0.05 V
10 V - 0.05 - 0.05 - 0.05 - 0.05 V
15 V - 0.05 - 0.05 - 0.05 - 0.05 V
NXP Semiconductors HEF4538B
Dual precision monostable multivibrator
[1] Only one monostable is switching: for the specified current during the output pulse (output nQ is HIGH).
10. Dynamic characteristics
IOH HIGH-level
output current
VO = 2.5 V 5 V - 1.7 - 1.4 - 1.1 - 1.1 mA
VO = 4.6 V 5 V - 0.64 - 0.5 - 0.36 - 0.36 mA
VO = 9.5 V 10 V - 1.6 - 1.3 - 0.9 - 0.9 mA
VO = 13.5 V 15 V - 4.2 - 3.4 - 2.4 - 2.4 mA
IOL LOW-level
output current
VO = 0.4 V 5 V 0.64 - 0.5 - 0.36 - 0.36 - mA
VO = 0.5 V 10 V 1.6 - 1.3 - 0.9 - 0.9 - mA
VO = 1.5 V 15 V 4.2 - 3.4 - 2.4 - 2.4 - mA input leakage
current
nA, nB 15 V - 0.1 - 0.1 - 1.0 - 1.0 A
nREXT/CEXT 15 V - 0.3 - 0.1 - 1.0 - 1.0 A input
capacitance - - 7.5 - - - - pF
Table 6. Static characteristics …continued
VSS = 0 V; VI = VSS or VDD unless otherwise specified.
Table 7. Typical static characteristics
VSS = 0 V; VI = VSS or VDD; Tamb = +25 C.
IDD supply current active state 5 V [1] 55 A
10 V 150 A
15 V 220 A input capacitance nREXT/CEXT - 15 pF
Table 8. Dynamic characteristics
VSS = 0 V; Tamb = 25 C; for test circuit see Figure11.
tPHL HIGH to LOW
propagation
delay
nA, nB to nQ;
see Figure6
5 V 193 ns + (0.55 ns/pF) CL - 220 440 ns
10 V 74 ns + (0.23 ns/pF) CL - 85 190 ns
15 V 52 ns + (0.16 ns/pF) CL - 60 120 ns
nCD to nQ; see Figure6 5 V 98 ns + (0.55 ns/pF) CL - 125 250 ns
10 V 44 ns + (0.23 ns/pF) CL -55 110 ns
15 V 32 ns + (0.16 ns/pF) CL -40 80 ns
tPLH LOW to HIGH
propagation
delay
nA, nB to nQ;
see Figure6
5 V 173 ns + (0.55 ns/pF) CL - 200 460 ns
10 V 79 ns + (0.23 ns/pF) CL - 90 180 ns
15 V 52 ns + (0.16 ns/pF) CL - 60 120 ns
nCD to nQ; see Figure6 5 V 98 ns + (0.55 ns/pF) CL - 125 250 ns
10 V 44 ns + (0.23 ns/pF) CL -55 110 ns
15 V 32 ns + (0.16 ns/pF) CL -40 80 ns
NXP Semiconductors HEF4538B
Dual precision monostable multivibrator transition time see Figure6 5 V 10 ns + (1.00 ns/pF) CL - 60 120 ns
10 V 9 ns + (0.42 ns/pF) CL - 30 60 ns
15 V 6 ns + (0.28 ns/pF) CL - 20 40 ns
trec recovery time nCD to nA, nB;
see Figure7
5 V - 20 40 ns
10 V - 10 20 ns
15 V - 5 10 ns
trtrig retrigger time nQ, nQ to nA, nB;
see Figure7
5 V 0 - - ns
10 V 0 - - ns
15 V 0 - - ns pulse width nA LOW; minimum width;
see Figure7
5 V 90 45 - ns
10 V 30 15 - ns
15 V 24 12 - ns
nB HIGH;
minimum width;
see Figure7
5 V 50 25 - ns
10 V 24 12 - ns
15 V 20 10 - ns
nCD LOW;
minimum width;
see Figure7
5 V 55 25 - ns
10 V 25 12 - ns
15 V 20 10 - ns
nQ or nQ;
REXT= 100 k;
CEXT =2.0 nF;
see Figure7
5 V 218 230 242 s
10 V 213 224 235 s
15 V 211 223 234 s
nQ or nQ;
REXT= 100 k;
CEXT =0.1 F;
see Figure7
5 V 10.3 10.8 11.3 ms
10 V 10.2 10.7 11.2 ms
15 V 10.1 10.6 11.1 ms
nQ or nQ;
REXT= 100 k;
CEXT= 10 F;
see Figure7
5 V 1.01 1.09 1.11 s
10 V 0.99 1.04 1.09 s
15 V 0.99 1.04 1.09 s
tW pulse width
variation
nQ or nQ variation over
temperature range;
see Figure8
5 V - 0.2 - %
10 V - 0.2 - %
15 V - 0.2 - %
nQ or nQ variation over
VDD voltage range Vto 15 V; see Figure9 1.5 - %
nQ or nQ variation
between monostables in
the same device;
REXT= 100 k;
CEXT=2nF to 10F
5 V - 1- %
10 V - 1- %
15 V - 1- %
REXT external timing
resistor [2] k
CEXT external timing
capacitor
2000 - no
limits
Table 8. Dynamic characteristics …continued
VSS = 0 V; Tamb = 25 C; for test circuit see Figure11.
NXP Semiconductors HEF4538B
Dual precision monostable multivibrator
[1] The typical values of the propagation delay and transition times are calculated from the extrapolation formulas shown (CL in pF).
[2] The maximum permissible resistance REXT, which holds the specified accuracy of tW (nQ, nQ output), depends on the leakage current
of the capacitor CEXT and the leakage of the HEF4538B.
11. Waveforms
Table 9. Measurement points
5 V to 15 V 0.5VDD 0.5VDD

Partno	Mfg	Dc	Qty	Available	Descript
HEF4538BT	NXP Pb-free	N/a	1000	avai	Dual precision monostable multivibrator