M54HC221 [STMICROELECTRONICS]
DUAL MONOSTABLE MULTIVIBRATOR; 双单稳多谐振荡器
| 型号： | M54HC221 |
| 厂家： | 
ST |
| 描述： | DUAL MONOSTABLE MULTIVIBRATOR |
| 文件： | 总14页 (文件大小：290K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
M54HC221/221A
M74HC221/221A
DUAL MONOSTABLE MULTIVIBRATOR
.
.
HIGH SPEED
tPD = 25 ns (TYP) at VCC = 5V
LOW POWER DISSIPATION
STANDBYSTATE ICC=4 µA (MAX.) AT TA=25°C
ACTIVESTATEICC =700µA (MAX.)AT VCC=5V
HIGH NOISE IMMUNITY
.
.
.
.
.
.
.
V
NIH = VNIL = 28 % VCC (MIN.)
B1R
F1R
OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
SYMMETRICAL OUTPUT IMPEDANCE
IOH = IOL = 4 mA (MIN.)
BALANCED PROPAGATION DELAYS
tPLH = tPHL
WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V TO 6 V
WIDE OUTPUT PULSE WIDTH RANGE
tWOUT = 150 ns 60 s OVER AT VCC = 4.5 V
PIN AND FUNCTION COMPATIBLE WITH
54/74LS221
(Plastic Package)
(Ceramic Package)
M1R
C1R
(Micro Package)
(Chip Carrier)
ORDER CODES :
M54HCXXXF1R
M74HCXXXXM1R
M74HCXXXB1R
M74HCXXXC1R
PIN CONNECTIONS (top view)
DESCRIPTION
The M54/74HC221/221A are high speed CMOS
MONOSTABLE multivibrators fabricated with sili-
con gate C2MOS technology. It achieves the high
speed operation similar to equivalent LSTTL while
maintaining the CMOS low power dissipation. There
are two trigger inputs, AINPUT (negative edge) and
B INPUT (positive edge). Triggering on the B input
occurs at a particular voltage threshold and is not re-
lated to the rise and fall time of the applied pulse.
The device may also be triggered by using the CLR
input (positive-edge) because of the Schmitt-trigger
input ; after triggering the output maintains the
MONOSTABLEstate for the time period determined
by the external resistor Rx and capacitor Cx.Taking
CLR low breaks this MONOSTABLE STATE. If the
next trigger pulse occurs during the MONOSTABLE
period it makes the MONOSTABLE period longer.
Limit for values of Cx and Rx :
Cx : NO LIMIT
Rx : VCC < 3.0 V 5 K Ω to 1 M Ω
VCC ≥ 3.0 V 1 K Ω to 1 M Ω
Two different pulse width constants are available:
K
K
0.7 for HC221
1 for HC221A
NC =
No Internal
Connection
All inputs are equipped with protection circuits
against static discharge and transient excess volt-
age.
October 1993
1/14
M54/M74HC221/221A
SYSTEM DIAGRAM
TIMING CHART
2/14
M54/M74HC221/221A
BLOCK DIAGRAM
Note :
(1) Cx, Rx, Dx are external components.
(2) Dx is a clamping diode.
Theexternal capacitor ischarged toVCC inthestand-by state, i.e. no trigger. When thesupply voltage is turned off Cx is discharged mainly
through an internal parasitic diode (see figures). If Cx is sufficiently large and VCC decreases rapidy, there will be somepossibility of da-
maging 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 canbe calculated as follows :
tf ≥ (VCC – 0.7) Cx/20mA
In cases where tf is too short an external clamping diode is required to protect the I.C. from the surge current.
FUNCTIONAL DESCRIPTION
Thevoltage atR/C external begins to rise witha time
constant set by the external components Rx, Cx.
STAND-BY STATE
Triggering the multivibrator causes Qto go high after
internal delay due to the flip-flop and the gate. Q re-
mains high until the voltage at R/C external rises
again to VREFH. Atthis point C2 output goes low and
O goes low. C2 stop operating. That means that
after triggering when the voltage R/C external re-
turns 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 ca-
pacitorand the delay time in the I.C. can be ignored,
the width of the output pulse tw (out) is as follows :
tW(OUT) = 0.70 Cx Rx (HC221)
The external capacitor, Cx, is fully charged to VCC
in the stand-by state. Hence, before triggering, tran-
sistorQp 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 :
1st) A is ”low” and B has a falling edge ;
2nd) B is ”high” and A has a rising edge ;
3rd) A is low and B is high and C1 has a rising edge.
tW(OUT) = Cx Rx (HC221A)
RESET OPERATION
After the multivibrator has been retriggered com-
parator C1 and C2 start operating and Qn is turned
on. Cx then discharges through Qn. The voltage at
the node R/C external falls.
CL is normally high. If CL is low, the trigger is not ef-
fective because Q output goes low and trigger con-
trol flip-flop is reset.
Also transistor Op is turned on and Cx is charged
quicky to VCC. This means if CL input goes low, the
IC becomes waiting state both in operating and non
operating state.
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.
3/14
M54/M74HC221/221A
TRUTH TABLE
INPUTS
OUTPUTS
NOTE
A
B
H
L
CLR
H
Q
Q
OUTPUT ENABLE
INHIBIT
X
H
L
H
L (*)
L (*)
H (*)
H (*)
X
H
INHIBIT
H
OUTPUT ENABLE
OUTPUT ENABLE
INHIBIT
L
H
X
X
L
L
H
X: Don’t Care (*): Except for monostble period
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
IEC LOGIC SYMBOL
PIN No
SYMBOL
NAME AND FUNCTION
1, 9
1A, 2A
Trigger Inputs (Negative
Edge Triggered)
2, 10
3, 11
1B, 2B
Trigger Inputs (Positive
Edge Triggered)
1CLR,
2CLR
Direct Reset LOW and
Trigger Action at Positive
Edge
4, 12
7
1Q, 2Q
Outputs (Active LOW)
2REXT/CEXT External Resistor
Capacitor Connection
13, 5
14, 6
1Q, 2Q
Outputs (Active HIGH)
1CEXT
2CEXT
External Capacitor
Connection
15
1REXT/CEXT External Resistor
Capacitor Connection
8
GND
VCC
Ground (0V)
16
Positive Supply Voltage
4/14
M54/M74HC221/221A
ABSOLUTE MAXIMUM RATING
Symbol
VCC
VI
Parameter
Value
-0.5 to +7
-0.5 to VCC + 0.5
-0.5 to VCC + 0.5
± 20
Unit
V
Supply Voltage
DC Input Voltage
V
VO
DC Output Voltage
V
IIK
DC Input Diode Current
DC Output Diode Current
DC Output Source Sink Current Per Output Pin
mA
mA
mA
mA
mW
oC
IOK
± 20
IO
± 25
ICC or IGND DC VCC or Ground Current
± 50
PD
Tstg
TL
Power Dissipation
500 (*)
Storage Temperature
Lead Temperature (10 sec)
-65 to +150
300
oC
Absolute MaximumRatingsare those values beyond whichdamage tothe 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
Parameter
Value
2 to 6
Unit
V
Supply Voltage
Input Voltage
Output Voltage
0 to VCC
0 to VCC
V
VO
V
Top
Operating Temperature: M54HC Series
M74HC Series
-55 to +125
-40 to +85
oC
oC
tr, tf
Input Rise and Fall Time (CLR and A only)
VCC = 2 V
VCC = 4.5 V
VCC = 6 V
0 to 1000
0 to 500
ns
0 to 400
CX
RX
External Capacitor
External Resistor
> 100 (*)
pF
VCC < 3 V
5K to 1M (*)
1K to 1M (*)
Ω
VCC ≥ 3 V
(*)Themaximum allowable values of Cx and Rx are a function of leackage of capacitor Cx, the leackage of HC221/A, and leackage due to the
board layout and surface resistance. Susceptibility to externally induced noise signals may occur for Rx > 1MΩ
5/14
M54/M74HC221/221A
DC SPECIFICATIONS
Test Conditions
VCC
Value
TA = 25 oC
54HC and 74HC
-40 to 85 oC -55 to 125 oC
Symbol
Parameter
Unit
74HC
54HC
(V)
Min. Typ. Max. Min. Max. Min. Max.
VIH
High Level Input
Voltage
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
4.5
6.0
1.5
3.15
4.2
1.5
3.15
4.2
1.5
3.15
4.2
V
V
VIL
Low Level Input
Voltage
0.5
1.35
1.8
0.5
1.35
1.8
0.5
1.35
1.8
VOH
High Level
Output Voltage
(Q, Q Output)
1.9
4.4
5.9
2.0
4.5
6.0
1.9
4.4
1.9
4.4
VI =
VIH
or
IO=-20 µA
V
V
5.9
5.9
VIL
IO=-4.0 mA 4.18 4.31
4.13
5.63
4.10
5.60
IO=-5.2 mA 5.68
5.8
0.0
0.0
0.0
VOL
Low Level Output 2.0
Voltage
(Q, Q Output)
6.0
0.1
0.1
0.1
0.1
0.1
0.1
0.1
VI =
VIH
or
IO= 20 µA
4.5
0.1
0.1
VIL
4.5
6.0
IO= 4.0 mA
IO= 5.2 mA
0.17 0.26
0.18 0.26
±0.1
0.33
0.33
±1
0.40
0.40
±1
II
II
Input Leakage
6.0
VI = VCC or GND
µA
µA
µA
Current
R/C Terminal Off
6.0
VI = VCC or GND
±0.5
±5
±10
State Current
ICC
Quiescent Supply 6.0 VI = VCC or GND
Current
4
40
80
ICC
’
Active State
Supply Current (1)
2.0 VI = VCC or GND
45
400
0.7
250
530
1
260
650
1.3
350
850
1.7
µA
µA
VIN = VCC/2
4.5
6.0
mA
(1):Per Circuit
6/14
M54/M74HC221/221A
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Test Conditions
Value
-40 to 85 oC -55 to 125 oC
74HC 54HC
TA = 25 oC
54HC and 74HC
Symbol
Parameter
Unit
VCC
(V)
Min. Typ. Max. Min. Max. Min. Max.
tTLH
tTHL
Output Transition
Time
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
2.0
4.5
6.0
2.0
4.5
6.0
30
8
75
15
95
19
110
22
ns
ns
ns
ns
µs
ms
µs
ms
7
13
16
19
tPLH
tPHL
Propagation
Delay Time
(A, B - Q, Q)
102
30
24
102
30
24
67
20
16
1.5
1.3
1.2
7
210
42
265
53
315
63
36
45
54
tPLH
tPHL
Propagation
Delay Time
(CLR TRIGGER - Q, Q)
235
47
295
59
355
71
40
50
60
tPLH
tPHL
Propagation
Delay Time
(CLR - Q, Q)
160
32
200
40
240
48
27
34
41
tWOUT
Output Pulse
Width
(for HC221)
CX = 100 pF
RX = 10 KΩ
CX = 0.1 µF
RX = 100 KΩ
6.9
6.9
1.8
1.5
1.4
10
9.7
9.6
±1
tWOUT
Output Pulse
Width
(for HC221A)
CX = 100 pF
RX = 10 KΩ
CX = 0.1 µF
RX = 100 KΩ
∆tWOUT Output Pulse
Width Error
%
ns
ns
Between Circuits
in Same Package
tW(H)
tW(L)
Minimum Pulse
Width
2.0
4.5
6.0
2.0
4.5
6.0
75
15
13
75
15
13
10
95
19
16
95
19
16
10
110
22
20
tW(L)
Minimum Pulse
Width
110
22
20
CIN
Input Capacitance
5
10
pF
pF
CPD (*) Power Dissipation
Capacitance
174
(*) CPD isdefined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(RefertoTestCircuit).Average opertingcurrent canbeobtained bythefollowing equation. ICC(opr)=CPD •VCC •fIN +ICC’ Duty/100 +IC/2(per monostable)
(ICC’: Active Supply Current) (Duty:%)
7/14
M54/M74HC221/221A
Output Pulse Width Constant Characteristics
(for HC221)
Output Pulse Width Constant Characteristics
(for HC221A)
Output Pulse Width Characteristics (for HC221)
Output Pulse Width Characteristics (for HC221A)
8/14
M54/M74HC221/221A
SWITCHING CHARACTERISTICS TEST WAVEFORM
TEST WAVEFORM
Input Transition Time : 6ns
VIH = VCC, VIL = GND.
9/14
M54/M74HC221/221A
Plastic DIP16 (0.25) MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
0.51
0.77
TYP.
MAX.
MIN.
0.020
0.030
MAX.
a1
B
b
1.65
0.065
0.5
0.020
0.010
b1
D
E
e
0.25
20
0.787
8.5
2.54
17.78
0.335
0.100
0.700
e3
F
7.1
5.1
0.280
0.201
I
L
3.3
0.130
Z
1.27
0.050
P001C
10/14
M54/M74HC221/221A
Ceramic DIP16/1 MECHANICAL DATA
mm
inch
DIM.
MIN.
TYP.
MAX.
20
MIN.
TYP.
MAX.
0.787
0.276
A
B
7
D
E
3.3
0.130
0.700
0.38
0.015
e3
F
17.78
2.29
0.4
2.79
0.55
1.52
0.31
1.27
10.3
8.05
5.08
0.090
0.016
0.046
0.009
0.020
0.110
0.022
0.060
0.012
0.050
0.406
0.317
0.200
G
H
L
1.17
0.22
0.51
M
N
P
7.8
0.307
Q
P053D
11/14
M54/M74HC221/221A
SO16 (Narrow) MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
TYP.
MAX.
1.75
0.2
MIN.
MAX.
0.068
0.007
0.064
0.018
0.010
A
a1
a2
b
0.1
0.004
1.65
0.46
0.25
0.35
0.19
0.013
0.007
b1
C
0.5
0.019
c1
D
45° (typ.)
9.8
5.8
10
0.385
0.228
0.393
0.244
E
6.2
e
1.27
8.89
0.050
0.350
e3
F
3.8
4.6
0.5
4.0
5.3
0.149
0.181
0.019
0.157
0.208
0.050
0.024
G
L
1.27
0.62
M
S
8° (max.)
P013H
12/14
M54/M74HC221/221A
PLCC20 MECHANICAL DATA
mm
inch
DIM.
MIN.
9.78
8.89
4.2
TYP.
MAX.
10.03
9.04
MIN.
0.385
0.350
0.165
TYP.
MAX.
0.395
0.356
0.180
A
B
D
4.57
d1
d2
E
2.54
0.56
0.100
0.022
7.37
8.38
0.290
0.330
0.004
e
1.27
5.08
0.38
0.050
0.200
0.015
e3
F
G
0.101
M
M1
1.27
1.14
0.050
0.045
P027A
13/14
M54/M74HC221/221A
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. Specificationsmentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronicsproductsare notauthorized foruse ascritical componentsin life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.
1994 SGS-THOMSON Microelectronics - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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14/14
相关型号：
M54HC221F1
HC/UH SERIES, DUAL MONOSTABLE MULTIVIBRATOR, CDIP16, FRIT SEALED, CERAMIC, DIP-16
STMICROELECTR
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