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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 multivibrator fabricated with silicon gate C2MOS 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 (tr = tf = 1 s) as they are schmitt trigger inputs. This device may also be triggered by using CLR input (positive Weight: 0.02 g (typ.) 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: External capacitor, Cx.......... No limit External resistor, Rx ............ VCC = 2.0 V more than 5 k VCC = 3.0 V more than 1 k 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: tpd = 8.1 ns (typ.) (VCC = 5 V) Low power dissipation: Standby state Active state ICC = 4 A (max) (Ta = 25C) ICC = 600 A (max) (VCC = 5.0 V)
High noise immunity: VNIH = VNIL = 28% VCC (min) Power down protection is equipped with all inputs. Balanced propagation delays: tpLH tpHL - Wide operating voltage range: VCC (opr) = 2~5.5 V Pin and function compatible with 74HC123A/221A
000630EBA1
* 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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TC7MH123,221AFK
Pin Assignment (top view)
1A 1B
1CLR
1Q
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
VCC 1Rx/Cx 1Cx 1Q
2Q 2CLR
2Q 2Cx 2Rx/Cx GND
2B 2A
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 (1) 1A (2) 1B 1CLR 1Cx 1Rx/Cx 2A 2B
2CLR
TC7MH221AFK (13) (4)
1A
&
1Q 1Q
1B 1CLR 1Cx 1Rx/Cx 2A 2B
2CLR
(1) (2) (3) (14) (15) (9) (10)
&
1
(13) (4)
1Q 1Q
(3) (14) (15) (9) (10)
R CX RX/CX
R CX RX/CX
(5) (12)
2Q 2Q
(5) (12)
2Q 2Q
(11) (6) 2Cx (7) 2Rx/Cx
(11) (6) 2Cx (7) 2Rx/Cx
Truth Table
Inputs A B H X H L L X H X L L H L X
CLR
Outputs Q
Q
Note Output enable
H H H H L L H H
Inhibit Inhibit Output enable Output enable Reset
X: Don't care
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TC7MH123,221AFK
Block Diagram
Dx Cx Rx 14 15 CX RX/CX 13 1 A B2 Q 9 A B 10 VCC 6 7 CX RX/CX 5 Q Cx Rx VCC Dx
4
Q
12
Q
3
CLR
11
CLR
Note1: Cx, Rx, Dx are external capacitor, resistor, and diode, respectively. Note2: External clamping diode, Dx; The external capacitor is charged to VCC level in the wait state, i.e. when no trigger is applied. If the supply voltage is turned off, Cx is discharges mainly through the internal (parasitic) diode. If Cx is sufficiently large and VCC drops rapidly, there will be some possibility of damaging the IC through in rush current or latch-up. If the capacitance of the supply voltage filter is large enough and VCC drops slowly, the in rush current is automatically limited and damage to the IC is avoided. 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: tf > (VCC - 0.7) Cx/20 mA = (tf is the time between the supply voltage turn off and the supply voltage reaching 0.4 VCC) 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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TC7MH123,221AFK
System Diagram
TC7MH123AFK
VCC Vref L QP C1 C2 Vref H
RX/CX QN
CX VCC R A B D Q F/F
CK Q
Q
Q CLR
Timing Chart
TC7MH123AFK
trr VIH A VIL B VIH VIL VIH
CLR
VIL VCC Vref H Vref L GND VOH VOL VOH
RX/CX Q
Q
twOUT
twOUT
twOUT + trr
VOL
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TC7MH123,221AFK
System Diagram
TC7MH221AFK
VCC Vref L QP C1 C2 Vref H
RX/CX QN
CX
R A B D Q F/F
CK Q
Q
Q CLR
Timing Chart
TC7MH221AFK
VIH A B VIL VIH VIL
CLR
VIH VIL
RX/CX
Q
VCC Vref H Vref L GND VOH VOL
Q
VOH twOUT twOUT twOUT VOL
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Functional Description
(1) Stand-by state The external capacitor (Cx) is fully charged to VCC in the stand-by state. That means, before triggering, the QP and QN transistors which are connected to the Rx/Cx node are in the off state. Two 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. 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 QN is turned on. The external capacitor discharges through QN. The voltage level at the Rx/Cx node drops. If the Rx/Cx voltage level falls to the internal reference voltage Vref L, the output of C1 becomes low. The flip-flop is then reset and QN turns off. At that moment C1 stops but C2 continues operating. After QN turns off, the voltage at the Rx/Cx node starts rising at a rate determined by the time 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, tw (OUT), is as follows: tw (OUT) = 1.0 Cx Rx 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, trr (min), depends on VCC and Cx. 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, QP turns on and Cx is charged rapidly to VCC. This means if CLR is set low, the IC goes into a wait state.
(2)
(3)
(4)
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TC7MH123,221AFK
Maximum Ratings (Ta = 25C)
Characteristics Supply voltage range DC input voltage DC output voltage Input diode current Output diode current DC output current DC VCC/ground current Power dissipation Storage temperature Symbol VCC VIN VOUT IIK IOK IOUT ICC PD Tstg Rating -0.5~7.0 -0.5~7.0 -0.5~VCC + 0.5 -20 20 25 50 180 -65~150 Unit V V V mA mA mA mA mW C
Recommended Operating Conditions
Characteristics Supply voltage Input voltage Output voltage Operating temperature Input rise and fall time ( CLR only) External capacitor External resistor Cx Rx Symbol VCC VIN VOUT Topr dt/dv Rating 2.0~5.5 0~5.5 0~VCC -40~85 0~100 (VCC = 3.3 0.3 V) 0~20 (VCC = 5 0.5 V) No limitation (Note3) > 5 k (VCC = 2.0 V) (Note3) = > 1 k (VCC > 3.0 V) (Note3) = = Unit V V V C ns/V F
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 M.
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TC7MH123,221AFK
Electrical Characteristics DC Characteristics
Characteristics Symbol Test Condition VCC (V) 2.0 High level Input voltage 2.0 Low level VIL 3.0~5.5 2.0 VIN = VIH or VIL IOH = -50 A 3.0 4.5 IOH = -4 mA Output voltage IOH = -8 mA IOL = 50 A IOL = 4 mA IOL = 8 mA Input leakage current Rx/Cx terminal off-state current Quiescent supply current Active-state supply current (Note4) ICC IIN IIN ICC VIN = 5.5 V or GND VIN = VCC or GND VIN = VCC or GND VIN = VCC or GND Rx/Cx = 0.5 VCC 3.0 4.5 2.0 3.0 4.5 3.0 4.5 0~5.5 5.5 5.5 3.0 4.5 5.5 VIN = VIH or VIL VIH 3.0~5.5 Min 1.50 VCC x 0.7 1.9 2.9 4.4 2.58 3.94 Ta = 25C Typ. 2.0 3.0 4.5 0 0 0 160 380 560 Max 0.50 VCC x 0.3 0.1 0.1 0.1 0.36 0.36 0.1 0.25 4.0 250 500 750 Ta = -40~85C Min 1.50 VCC x 0.7 1.9 2.9 4.4 2.48 3.80 Max V 0.50 VCC x 0.3 0.1 0.1 0.1 0.44 0.44 1.0 .2.50 40.0 280 650 975 A A A A V Unit
High level
VOH
Low level
VOL
Note4: Per circuit
Timing Requirements (Input: tr = tf = 3 ns)
Characteristics Symbol Test Condition VCC (V) Minimum pulse width tw (L) tw (H) tw (L) Rx = 1 k Minimum retrigger time (Note5) t rr Cx = 100 pF Rx = 1 k Cx = 0.01 F 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 Ta = 25C Typ. Limit 5.0 5.0 5.0 5.0 Ta = -40~85C Limit 5.0 5.0 5.0 5.0 ns ns ns Unit
Minimum clear width ( CLR )
60 39 1.5 1.2
s
Note5: For TC7MH123AFK only
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AC Characteristics (Input: tr = tf = 3 ns)
Characteristics Symbol Test Condition VCC (V) CL (pF) 3.3 0.3 15 50 5.0 0.5 15 50 15 50 15 50 15 50 15 50 50 50 50 50 50 50 50 Min 90 90 0.9 0.9 (Note6) Ta = 25C Typ. 13.4 15.9 8.1 9.6 14.5 17.0 8.7 10.2 10.3 12.8 6.3 7.8 160 133 100 100 1.0 1.0 1 4 73 Max 20.6 24.1 12.0 14.0 22.4 25.9 12.9 14.9 15.8 19.3 9.4 11.4 240 200 110 110 1.1 1.1 10 Ta = -40~85C 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 90 90 0.9 0.9 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 1.1 10 % pF pF s ns ns ns ns Unit
Propagation delay time (A, B-Q, Q )
tpLH tpHL
Propagation delay time ( CLR trigger-Q, Q )
3.3 0.3 tpLH tpHL 5.0 0.5
Propagation delay time ( CLR -Q, Q )
3.3 0.3 tpLH tpHL 5.0 0.5 Cx = 28 pF Rx = 2 k 3.3 0.3 5.0 0.5 3.3 0.3 5.0 0.5 3.3 0.3 5.0 0.5
Output pulse width
twOUT
Cx = 0.01 F Rx = 10 k Cx = 0.1 F Rx = 10 k
ms
Output pulse width error between circuits (in same package) Input capacitance Power dissipation capacitance
twOUT CIN CPD
Note6: CPD 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: ICC (opr) = CPD VCC fIN + ICC' Duty/100 + ICC/2 (per circuit) (ICC': active supply current) (Duty: %)
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TC7MH123,221AFK
twout - Cx Characteristics (typ.)
VCC = 4.5 V CL = 50 pF
trr - VCC Characteristics (typ.) (TC7MH123AFK)
Ta = 25C 10
(s)
10
3
Output pulse width tWOUT
Rx = 1 M 2 Rx = 100 k
Minimum retrigger time trr (s)
10
Cx = 0.01 F 1
10 Rx = 10 k
Cx = 1000 pF 0.1 Cx = 100 pF
1 Rx = 1 k -1 10 2 10 3 10 4
10
0.01 0
1
2
3
4
5
6
External capacitor Cx (pF)
Supply voltage VCC
(V)
Output pulse width constant K - Supply voltage (typ.)
(External resistor (Rx) = 10 k: tWOUT = K Cx Rx)
Output pulse width constant k
1.2
1.1 Cx = 1000 pF
Cx = 0.01 F 1.0 Cx = 1 F, Cx = 0.1 F
2
3
4
5
6
Supply voltage VCC
(V)
Input Equivalent Circuit
Input
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TC7MH123,221AFK
Package Dimensions
Weight: 0.02 g (typ.)
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