TC7MH123AFK [TOSHIBA]
IC LV/LV-A/LVX/H SERIES, DUAL MONOSTABLE MULTIVIBRATOR, PDSO16, 3 MM, 0.50 MM PITCH, PLASTIC, VSSOP-16, Prescaler/Multivibrator;
| 型号： | TC7MH123AFK |
| 厂家： | 
TOSHIBA |
| 描述： | IC LV/LV-A/LVX/H SERIES, DUAL MONOSTABLE MULTIVIBRATOR, PDSO16, 3 MM, 0.50 MM PITCH, PLASTIC, VSSOP-16, Prescaler/Multivibrator 时钟 光电二极管 逻辑集成电路 |
| 文件： | 总12页 (文件大小：220K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TC7MH123,221AFK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC7MH123AFK,TC7MH221AFK
Dual Monostable Multivibrator
TC7MH123AFK Retriggerable
TC7MH221AFK Non-Retriggerable
The TC7MH123AFK, TC7MH221AFK are advanced high speed
CMOS monostable multivibrators fabricated with silicon gate
2
C MOS technology.
There are two trigger inputs, A input (negative edge), and B
input (positive edge). These inputs are valid for a slow rise/fall
time signal (t = t = 1 s) as they are schmitt trigger inputs. This
r
f
device may also be triggered by using CLR input (positive edge).
After triggering, the output stays in a monostable state for a
time period determined by the external resistor and capacitor (Rx,
Cx). A low level at the CLR input breaks this state.
Limits for Cx and Rx are:
Weight: 0.02 g (typ.)
External capacitor, Cx..........No limit
External resistor, Rx ............V
V
= 2.0 V more than 5 kΩ
= 3.0 V more than 1 kΩ
CC
CC
An input protection circuit ensures that 0 to 7 V can be applied to the input pins without regard to the supply
voltage. This device can be used to interface 5 V to 3 V systems and two supply systems such as battery back up.
This circuit prevents device destruction due to mismatched supply and input voltages.
Features
•
•
High speed: t = 8.1 ns (typ.) (V = 5 V)
pd CC
Low power dissipation: Standby state
Active state
I
I
= 4 µA (max) (Ta = 25°C)
CC
CC
= 600 µA (max) (V
CC
= 5.0 V)
•
•
•
•
•
High noise immunity: V
NIH
Power down protection is equipped with all inputs.
Balanced propagation delays: t ≈ t
Wide operating voltage range: V
CC (opr)
Pin and function compatible with 74HC123A/221A
= V
NIL
= 28% V (min)
CC
pLH pHL
= 2~5.5 V
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2001-09-12
TC7MH123,221AFK
Pin Assignment (top view)
1A
1B
1
2
3
4
5
6
7
8
16
V
CC
15 1Rx/Cx
14 1Cx
13 1Q
1CLR
1Q
2Q
12
11
2Q
2Cx
2CLR
2Rx/Cx
GND
10 2B
2A
9
Note: When using a single circuit only, please set CLR to L, keep Rx/Cx･Q･ Q open and set other pins to either
H or L.
IEC Logic Symbol
TC7MH123AFK
&
TC7MH221AFK
(1)
(2)
(1)
(2)
1A
1A
&
1
(13)
(4)
(13)
(4)
1B
1Q
1Q
1B
1Q
1Q
(3)
(14)
(15)
(9)
(3)
(14)
(15)
(9)
1CLR
1Cx
1CLR
1Cx
R
R
CX
CX
1Rx/Cx
2A
1Rx/Cx
2A
RX/CX
RX/CX
(10)
(5)
(10)
(5)
2B
2Q
2Q
2B
2Q
2Q
(11)
(6)
(12)
(11)
(6)
(12)
2CLR
2Cx
2CLR
2Cx
(7)
(7)
2Rx/Cx
2Rx/Cx
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
Reset
L
H
X
X
L
L
H
X: Don’t care
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2001-09-12
TC7MH123,221AFK
Block Diagram
Dx
Rx
Dx
Cx
Cx
V
V
CC
CC
Rx
14
15
6
7
CX RX/CX
CX RX/CX
13
5
Q
Q
Q
Q
1
9
A
A
B
B
4
12
2
10
3
11
CLR
CLR
Note1: Cx, Rx, Dx are external capacitor, resistor, and diode, respectively.
Note2: External clamping diode, Dx;
The external capacitor is charged to V
level in the wait state, i.e. when no trigger is applied.
CC
If the supply voltage is turned off, Cx is discharges mainly through the internal (parasitic) diode. If Cx is
sufficiently large and V drops rapidly, there will be some possibility of damaging the IC through in rush
CC
current or latch-up. If the capacitance of the supply voltage filter is large enough and V
rush current is automatically limited and damage to the IC is avoided.
drops slowly, the in
CC
The maximum value of forward current through the parasitic diode is ±20 mA.
In the case of a large Cx, the limit of fall time of the supply voltage is determined as follows:
>
t
f
(V − 0.7)･Cx/20 mA
CC
(t is the time between the supply voltage turn off and the supply voltage reaching 0.4 V
)
CC
f
In the even a system does not satisfy the above condition, an external clamping diode (Dx) is needed to
protect the IC from rush current.
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2001-09-12
TC7MH123,221AFK
System Diagram
TC7MH123AFK
V
CC
V
V
ref
ref
C1
L
C2
H
Q
P
R /C
X
X
Q
N
C
X
V
CC
R
D
Q
A
F/F
CK Q
B
Q
Q
CLR
Timing Chart
TC7MH123AFK
t
rr
V
IH
A
B
V
V
V
IL
IH
IL
V
V
IH
IL
CLR
V
V
V
CC
ref
ref
H
L
R /C
X
X
GND
V
V
V
V
OH
OL
OH
OL
Q
Q
t OUT
w
t OUT
w
t OUT + t
w rr
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2001-09-12
TC7MH123,221AFK
System Diagram
TC7MH221AFK
V
CC
V
V
ref
ref
C1
L
C2
H
Q
P
R /C
X
X
X
Q
N
C
R
D
Q
A
B
F/F
CK Q
Q
Q
CLR
Timing Chart
TC7MH221AFK
V
IH
A
B
V
V
V
V
V
IL
IH
IL
IH
IL
CLR
V
V
V
CC
ref
ref
R /C
X
X
H
L
GND
V
OH
Q
V
V
OL
OH
Q
V
OL
t OUT
w
t OUT
w
t OUT
w
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2001-09-12
TC7MH123,221AFK
Functional Description
(1) Stand-by state
The external capacitor (Cx) is fully charged to V
in the stand-by state. That means, before
CC
triggering, the Q and Q transistors which are connected to the Rx/Cx node are in the off state. Two
P
N
comparators that relate to the timing of the output pulse, and two reference voltage supplies turn off.
The total supply current is only leakage current.
(2) Trigger operation
Trigger operation is effective in any of the following three cases.
•
•
•
A input is low, and the B input has a rising signal
B input is high, and the A input has a falling signal
A input is low and the B input is high, and the CLR input has a rising signal
After a trigger becomes effective, comparators C1 and C2 start operating, and Q is turned on. The
N
external capacitor discharges through Q . The voltage level at the Rx/Cx node drops. If the Rx/Cx
N
voltage level falls to the internal reference voltage Vref L, the output of C1 becomes low. The flip-flop
is then reset and Q turns off. At that moment C1 stops but C2 continues operating.
N
After Q turns off, the voltage at the Rx/Cx node starts rising at a rate determined by the time
N
constant of external capacitor Cx and resistor Rx.
Upon triggering, output Q becomes high, following some delay time of the internal F/F and gates. It
stays high even if the voltage of Rx/Cx changes from falling to rising. When Rx/Cx reaches the
internal reference voltage Vref H, the output of C2 becomes low, the output Q goes low and C2 stops
its operation. That means, after triggering, when the voltage level of the Rx/Cx node reaches Vref H,
the IC returns to its monostable state.
With large values of Cx and Rx, and ignoring the discharge time of the capacitor and internal delays
of the IC, the width of the output pulse, t (OUT), is as follows:
w
t
w
(OUT) = 1.0 Cx Rx
(3) Retrigger operation (TC7MH123AFK)
When a new trigger is applied to either input A or B while in the monostable state, it is effective only
if the IC is charging Cx. The voltage level of the Rx/Cx node then falls to Vref L level again. Therefore
the Q output stays high if the next trigger comes in before the time period set by Cx and Rx.
If the new trigger is very close to previous trigger, such as an occurrence during the discharge cycle, it
will have no effect.
The minimum time for a trigger to be effective 2nd trigger, t (min), depends on V
rr CC
and Cx.
(4) Reset operation
In normal operation, the CLR input is held high. If CLR is low, a trigger has no effect because the
Q output is held low and the trigger control F/F is reset. Also, Q turns on and Cx is charged rapidly
P
to V
.
CC
This means if CLR is set low, the IC goes into a wait state.
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2001-09-12
TC7MH123,221AFK
Maximum Ratings (Ta = 25°C)
Characteristics
Symbol
Rating
Unit
Supply voltage range
DC input voltage
V
−0.5~7.0
−0.5~7.0
V
V
CC
V
IN
DC output voltage
Input diode current
Output diode current
DC output current
V
−0.5~V
+ 0.5
V
OUT
CC
I
−20
mA
mA
mA
mA
mW
°C
IK
I
±20
±25
OK
I
OUT
DC V /ground current
CC
I
±50
CC
Power dissipation
P
180
D
Storage temperature
T
−65~150
stg
Recommended Operating Conditions
Characteristics
Supply voltage
Symbol
Rating
Unit
V
2.0~5.5
0~5.5
V
V
CC
Input voltage
V
IN
Output voltage
V
0~V
V
OUT
CC
Operating temperature
Input rise and fall time
( CLR only)
T
−40~85
0~100 (V = 3.3 ± 0.3 V)
°C
opr
CC
dt/dv
Cx
ns/V
F
0~20 (V = 5 ± 0.5 V)
CC
External capacitor
External resistor
No limitation
(Note3)
>
5 k (V
1 k (V
= 2.0 V) (Note3)
=
CC
CC
Rx
Ω
>
=
>
3.0 V) (Note3)
=
Note3: The maximum allowable values of Cx and Rx are a function of leakage of capacitor of Cx, the leakage of
TC7MH123A/221A, and leakage due to board layout and surface resistance.
Susceptibility to externally induced noise signals may occur for Rx > 1 MΩ.
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2001-09-12
TC7MH123,221AFK
Electrical Characteristics
DC Characteristics
Ta = 25°C
Typ.
Ta = −40~85°C
Characteristics
Symbol
Test Condition
Unit
V
(V)
Min
Max
Min
Max
CC
2.0
1.50
1.50
High level
V
IH
V
× 0.7
V
CC
× 0.7
CC
3.0~5.5
2.0
Input voltage
V
0.50
0.50
Low level
High level
V
IL
V
V
CC
× 0.3
CC
3.0~5.5
× 0.3
2.0
3.0
1.9
2.9
4.4
2.58
3.94
2.0
3.0
4.5
1.9
2.9
4.4
2.48
3.80
I
= −50 µA
OH
V
or V
= V
IL
IN
IH
V
4.5
OH
I
I
= −4 mA
= −8 mA
3.0
OH
OH
4.5
Output voltage
V
2.0
0
0.1
0.1
0.1
0.36
0.36
±0.1
0.1
0.1
0.1
0.44
0.44
±1.0
I
= 50 µA
3.0
0
OL
V
or V
= V
IL
IN
IH
Low level
V
OL
4.5
0
I
I
= 4 mA
= 8 mA
3.0
OL
OL
4.5
Input leakage current
I
I
V
V
V
= 5.5 V or GND
0~5.5
µA
µA
µA
IN
IN
IN
IN
IN
Rx/Cx terminal off-state
current
= V
= V
or GND
or GND
5.5
±0.25
±2.50
CC
CC
Quiescent supply current
I
I
5.5
3.0
4.5
5.5
4.0
250
500
750
40.0
280
650
975
CC
CC
160
380
560
Active-state supply current
V
= V
or GND
IN
CC
µA
(Note4)
Rx/Cx = 0.5 V
CC
Note4: Per circuit
Timing Requirements (Input: t = t = 3 ns)
r
f
Ta = 25°C
Ta = −40~85°C
Characteristics
Minimum pulse width
Symbol
Test Condition
Unit
ns
V
(V)
Typ.
Limit
5.0
5.0
5.0
5.0
Limit
5.0
5.0
5.0
5.0
CC
3.3 ± 0.3
5.0 ± 0.5
3.3 ± 0.3
5.0 ± 0.5
3.3 ± 0.3
5.0 ± 0.5
3.3 ± 0.3
5.0 ± 0.5
t
w (L)
t
w (H)
Minimum clear width ( CLR )
t
ns
w (L)
Rx = 1 kΩ
60
39
1.5
1.2
ns
Cx = 100 pF
Minimum retrigger time
t
rr
(Note5)
Rx = 1 kΩ
µs
Cx = 0.01 µF
Note5: For TC7MH123AFK only
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2001-09-12
TC7MH123,221AFK
AC Characteristics (Input: t = t = 3 ns)
r
f
Ta = 25°C
Typ.
13.4
15.9
8.1
Ta = −40~85°C
Characteristics
Symbol
Test Condition
Unit
V
(V)
C
L
(pF)
Min
90
90
0.9
0.9
Max
20.6
24.1
12.0
14.0
22.4
25.9
12.9
14.9
15.8
19.3
9.4
Min
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Max
24.0
27.5
14.0
16.0
26.0
29.5
15.0
17.0
18.5
22.0
11.0
13.0
300
240
110
110
1.1
CC
15
3.3 ± 0.3
5.0 ± 0.5
3.3 ± 0.3
5.0 ± 0.5
3.3 ± 0.3
5.0 ± 0.5
Propagation delay time
(A, B-Q, Q )
50
15
50
15
50
15
50
15
50
15
50
50
50
50
50
50
50
t
t
pLH
pHL
ns
ns
ns
9.6
14.5
17.0
8.7
Propagation delay time
( CLR trigger-Q, Q )
t
t
pLH
pHL
10.2
10.3
12.8
6.3
Propagation delay time
( CLR -Q, Q )
t
t
pLH
pHL
7.8
11.4
240
200
110
110
1.1
Cx = 28 pF
Rx = 2 kΩ
3.3 ± 0.3
5.0 ± 0.5
3.3 ± 0.3
5.0 ± 0.5
3.3 ± 0.3
5.0 ± 0.5
160
133
100
100
1.0
ns
µs
Cx = 0.01 µF
Rx = 10 kΩ
90
Output pulse width
t
wOUT
90
Cx = 0.1 µF
Rx = 10 kΩ
0.9
0.9
ms
1.0
1.1
1.1
Output pulse width error
between circuits
∆t
50
±1
%
wOUT
(in same package)
Input capacitance
C
4
10
10
pF
pF
IN
Power dissipation
capacitance
C
PD
(Note6)
73
Note6: C
PD
is defined as the value of the internal equivalent capacitance which is calculated from the operating
current consumption without load.
Average operating current can be obtained by the equation:
I
= C ･V ･f + I ’･Duty/100 + I /2 (per circuit)
PD CC IN CC CC
CC (opr)
(I ’: active supply current)
CC
(Duty: %)
9
2001-09-12
TC7MH123,221AFK
t
– V
Characteristics (typ.)
(TC7MH123AFK)
rr
CC
t
– C Characteristics (typ.)
x
wout
V
= 4.5 V
= 50 pF
CC
Ta = 25°C
C
L
10
3
2
10
10
Rx = 1 MΩ
Cx = 0.01 µF
1
Rx = 100 kΩ
Rx = 10 kΩ
Rx = 1 kΩ
10
Cx = 1000 pF
Cx = 100 pF
0.1
1
1
−
0.01
10
2
3
4
0
1
2
3
4
5
6
10
10
10
External capacitor Cx (pF)
Supply voltage
V
(V)
CC
Output pulse width constant K – Supply
voltage (typ.)
(External resistor (Rx) = 10 kΩ: t
WOUT
= K･Cx･Rx)
1.2
1.1
1.0
Cx = 1000 pF
Cx = 0.01 µF
Cx = 1 µF, Cx = 0.1 µF
2
3
4
5
6
Supply voltage
V
(V)
CC
Input Equivalent Circuit
Input
10
2001-09-12
TC7MH123,221AFK
Package Dimensions
Weight: 0.02 g (typ.)
11
2001-09-12
TC7MH123,221AFK
RESTRICTIONS ON PRODUCT USE
000707EBA
• TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor
devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical
stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of
safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of
such TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as
set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and
conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability
Handbook” etc..
• The TOSHIBA products listed in this document are intended for usage in general electronics applications
(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,
etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires
extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or
bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or
spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments,
medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this
document shall be made at the customer’s own risk.
• The products described in this document are subject to the foreign exchange and foreign trade laws.
• The information contained herein is presented only as a guide for the applications of our products. No
responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other
rights of the third parties which may result from its use. No license is granted by implication or otherwise under
any intellectual property or other rights of TOSHIBA CORPORATION or others.
• The information contained herein is subject to change without notice.
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2001-09-12
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