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부품번호 | M74HC221 기능 |
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기능 | DUAL MONOSTABLE MULTIVIBRATOR | ||
제조업체 | ST Microelectronics | ||
로고 | |||
전체 14 페이지수
M54HC221/221A
M74HC221/221A
DUAL MONOSTABLE MULTIVIBRATOR
. HIGH SPEED
tPD = 25 ns (TYP) at VCC = 5V
. LOW POWER DISSIPATION
STANDBY STATE ICC=4 µA (MAX.) AT TA=25°C
ACTIVE STATE ICC = 700 µA (MAX.) AT VCC=5V
. HIGH NOISE IMMUNITY
VNIH = VNIL = 28 % VCC (MIN.)
. 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
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HCXXXF1R M74HCXXXXM1R
M74HCXXXB1R M74HCXXXC1R
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, A INPUT (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 ≅ 0.7 for HC221
K ≅ 1 for HC221A
All inputs are equipped with protection circuits
against static discharge and transient excess volt-
age.
PIN CONNECTIONS (top view)
NC =
No Internal
Connection
October 1993
1/14
M54/M74HC221/221A
TRUTH TABLE
INPUTS
A B CLR
HH
XLH
HXH
LH
LH
XXL
X: Don’t Care (*): Except for monostble period
OUTPUTS
QQ
L (*) H (*)
L (*) H (*)
LH
INPUT AND OUTPUT EQUIVALENT CIRCUIT
NOTE
OUTPUT ENABLE
INHIBIT
INHIBIT
OUTPUT ENABLE
OUTPUT ENABLE
INHIBIT
PIN DESCRIPTION
PIN No
1, 9
2, 10
3, 11
4, 12
7
13, 5
14, 6
15
8
16
SYMBOL
1A, 2A
1B, 2B
1CLR,
2CLR
1Q, 2Q
2REXT/CEXT
1Q, 2Q
1CEXT
2CEXT
1REXT/CEXT
GND
VCC
NAME AND FUNCTION
Trigger Inputs (Negative
Edge Triggered)
Trigger Inputs (Positive
Edge Triggered)
Direct Reset LOW and
Trigger Action at Positive
Edge
Outputs (Active LOW)
External Resistor
Capacitor Connection
Outputs (Active HIGH)
External Capacitor
Connection
External Resistor
Capacitor Connection
Ground (0V)
Positive Supply Voltage
IEC LOGIC SYMBOL
4/14
4페이지 M54/M74HC221/221A
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Symbol
Parameter
Test Conditions
VCC
(V)
TA = 25 oC
54HC and 74HC
Min. Typ. Max.
Value
-40 to 85 oC
74HC
Min. Max.
-55 to 125 oC
54HC
Min. Max.
Unit
tTLH Output Transition 2.0
tTHL Time
4.5
30 75
8 15
95 110
19 22 ns
6.0 7 13 16 19
tPLH Propagation
tPHL Delay Time
(A, B - Q, Q)
2.0
4.5
6.0
102 210 265 315
30 42 53 63 ns
24 36 45 54
tPLH Propagation
2.0
tPHL Delay Time
4.5
(CLRTRIGGER- Q,Q) 6.0
102 235 295 355
30 47 59 71 ns
24 40 50 60
tPLH Propagation
tPHL Delay Time
(CLR - Q, Q)
2.0
4.5
6.0
67 160 200 240
20 32 40 48 ns
16 27 34 41
tWOUT
Output Pulse
Width
(for HC221)
2.0 CX = 100 pF
4.5 RX = 10 KΩ
6.0
1.5
1.3
1.2
µs
2.0 CX = 0.1 µF
4.5 RX = 100 KΩ
7
6.9
ms
6.0 6.9
tWOUT
Output Pulse
Width
(for HC221A)
2.0 CX = 100 pF
4.5 RX = 10 KΩ
6.0
1.8
1.5
1.4
µs
2.0 CX = 0.1 µF
4.5 RX = 100 KΩ
10
9.7
ms
6.0 9.6
∆tWOUT
Output Pulse
Width Error
Between Circuits
in Same Package
±1
%
tW(H)
tW(L)
Minimum Pulse
Width
2.0
4.5
75 95 110
15 19 22 ns
6.0 13 16 20
tW(L) Minimum Pulse
Width
2.0
4.5
75 95 110
15 19 22 ns
6.0 13 16 20
CIN
CPD (*)
Input Capacitance
Power Dissipation
Capacitance
5 10 10 10 pF
174 pF
(*) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(RefertoTestCircuit). Average operting current canbeobtained by the following equation. ICC(opr) =CPD •VCC •fIN +ICC’ Duty/100 + IC/2 (per monostable)
(ICC’: Active Supply Current) (Duty:%)
7/14
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부품번호 | 상세설명 및 기능 | 제조사 |
M74HC221 | DUAL MONOSTABLE MULTIVIBRATOR | ST Microelectronics |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |