TC74VHC123,221AF/AFT/AFK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74VHC123AF, TC74VHC123AFT, TC74VHC123AFK TC74VHC221AF, TC74VHC221AFT, TC74VHC221AFK Dual Monostable Multivibrator TC74VHC123AF/AFT/AFK Retriggerable TC74VHC221AF/AFT/AFK Non-Retriggerable The TC74VHC123A/221A are 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 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 5.5 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. TC74VHC123AF, TC74VHC221AF TC74VHC123AFT, TC74VHC221AFT TC74VHC123AFK, TC74VHC221AFK Features * High speed: tpd = 8.1 ns (typ.) at VCC = 5 V * Low power dissipation Weight Standby state: 4 A (max) at Ta = 25C SOP16-P-300-1.27A TSSOP16-P-0044-0.65A VSSOP16-P-0030-0.50 Active state: 600 A (max) at Ta = 25C * 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 to 5.5 V * Pin and function compatible with 74HC123A/221A : 0.18 g (typ.) : 0.06 g (typ.) : 0.02 g (typ.) Start of commercial production 1991-11 1 2014-03-01 TC74VHC123,221AF/AFT/AFK Pin Assignment 1A 1 16 VCC 1B 2 15 1RX/CX 1CLR 3 14 1CX 1Q 4 13 1Q 2Q 5 12 2Q 2CX 6 11 2CLR 2RX/CX 7 10 2B GND 8 9 2A (top view) IEC Logic Symbol TC74VHC123A 1A 1B 1CLR 1CX 1RX/CX 2A 2B 2CLR 2CX 2RX/CX (1) (2) (3) (14) (15) & (13) (4) R CX RX/CX (9) (10) (11) (6) (7) TC74VHC221A 1A 1Q 1B 1Q 1CLR 1CX 1RX/CX & R CX RX/CX 2A (5) 2Q 2B (12) 2Q 2CLR 2CX 2RX/CX (1) (2) (3) (14) (15) (9) (10) (11) (6) (7) & 1 (13) (4) R CX RX/CX & R CX RX/CX 1 1Q 1Q (5) 2Q (12) 2Q Truth Table Inputs Outputs CLR H H X L H L H Inhibit H X H L H Inhibit L Q Function B A Q Output Enable H L H X X Output Enable Output Enable L L H Reset X: Don't care 2 2014-03-01 TC74VHC123,221AF/AFT/AFK Block Diagram (Note 1) (Note 2) DX DX CX 14 15 RX CX RX/CX A B CX VCC 6 13 7 CX RX/CX 5 Q 1 2 4 VCC RX A B 12 Q 3 CLR Q 9 10 Q 11 CLR Note 1: CX, RX, DX are external capacitor, resistor, and diode, respectively. Note 2: 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. 3 2014-03-01 TC74VHC123,221AF/AFT/AFK System Diagram TC74VHC123A VCC QP RX/CX Vref L Vref H C2 C1 QN VCC CX D R Q F/F A CK B Q Q Q CLR Timing Chart TC74VHC123A trr VIH A VIL VIH B VIL VIH CLR VIL VCC VrefH VrefL GND RX/CX VOH Q VOL VOH Q twOUT twOUT 4 twOUT + trr VOL 2014-03-01 TC74VHC123,221AF/AFT/AFK System Diagram TC74VHC221A VCC QP RX/CX Vref L C2 C1 Vref H QN CX D R Q F/F A CK B Q Q Q CLR Timing Chart TC74VHC221A VIH A VIL VIH B VIL VIH CLR VIL VCC VrefH VrefL GND RX/CX VOH Q VOL VOH Q twOUT twOUT 5 twOUT VOL 2014-03-01 TC74VHC123,221AF/AFT/AFK Functional Description (1) (2) (3) (4) Standby 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. First, the condition where the A input is low, and the B input has a rising signal; second, where the B input is high, and the A input has a falling signal; and third, where the 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 VrefL, 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 VrefH, 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 VrefH, 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 (TC74VHC123A) 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 VrefL 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. 6 2014-03-01 TC74VHC123,221AF/AFT/AFK Absolute Maximum Ratings (Note) Characteristics Symbol Rating Unit Supply voltage range VCC -0.5 to 7.0 V DC input voltage VIN -0.5 to 7.0 V VOUT -0.5 to VCC + 0.5 V Input diode current IIK -20 mA Output diode current IOK 20 mA DC output current IOUT 25 mA DC VCC/ground current ICC 50 mA Power dissipation PD 180 mW Storage temperature Tstg -65 to 150 C DC output voltage Note: Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or even destruction. Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the significant change in temperature, etc.) may cause this product to decrease in the reliability significantly even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute maximum ratings and the operating ranges. Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook ("Handling Precautions"/"Derating Concept and Methods") and individual reliability data (i.e. reliability test report and estimated failure rate, etc). Operating Ranges (Note 1) Characteristics Symbol Rating Unit Supply voltage VCC 2.0 to 5.5 V Input voltage VIN 0 to 5.5 V VOUT 0 to VCC V Operating temperature Topr -40 to 85 C Input rise and fall time dt/dv Output voltage External capacitor CX External resistor RX 0 to 100 (VCC = 3.3 0.3 V) 0 to 20 (VCC = 5 0.5 V) No limitation (Note 2) 5 k (VCC = 2.0 V) (Note 2) 1 k (VCC 3.0 V) (Note 2) ns/V F Note 1: The operating ranges must be maintained to ensure the normal operation of the device. Unused inputs must be tied to either VCC or GND. Note 2: The maximum allowable values of CX and RX are a function of leakage of capacitor CX, the leakage of TC74VHC123A/221A, and leakage due to board layout and surface resistance. Susceptibility to externally induced noise signals may occur for RX > 1 M. 7 2014-03-01 TC74VHC123,221AF/AFT/AFK Electrical Characteristics DC Characteristics Characteristics Symbol Test Condition VCC (V) High-level input voltage VIH Low-level input voltage VIL VOH VOL Typ. Max Min Max 2.0 1.50 3.0 to 5.5 VCC x 0.7 1.50 VCC x 0.7 2.0 0.50 0.50 VCC x 0.3 3.0 to 5.5 2.0 1.9 2.0 1.9 3.0 2.9 3.0 2.9 4.5 4.4 4.5 4.4 IOH = -4 mA 3.0 2.58 2.48 IOH = -8 mA 4.5 3.94 3.80 2.0 0.0 0.1 0.1 3.0 0.0 0.1 0.1 4.5 0.0 0.1 0.1 IOL = 4 mA 3.0 0.36 0.44 IOL = 8 mA 4.5 0.36 0.44 VIN = VIH or VIL IOL = 50 A Low-level output voltage Min VCC x 0.3 IOH = -50 A High-level output voltage Ta = -40 to 85C Ta = 25C VIN = VIH or VIL Unit V V V V Input leakage current IIN VIN = 5.5 V or GND 0 to 5.5 0.1 1.0 A RX/CX terminal off-state current IIN VIN = VCC or GND 5.5 0.25 2.5 A Quiescent supply current ICC VIN = VCC or GND 5.5 4.0 40.0 A 3.0 160 250 280 4.5 380 500 650 5.5 560 750 975 Active-state supply current (Note) Note: ICC VIN = VCC or GND RX/CX = 0.5 VCC A Per circuit 8 2014-03-01 TC74VHC123,221AF/AFT/AFK Timing Requirements (input: tr = tf = 3 ns) Characteristics Symbol Limit Limit 3.3 0.3 5.0 5.0 5.0 0.5 5.0 5.0 3.3 0.3 5.0 5.0 5.0 0.5 5.0 5.0 RX = 1 k 3.3 0.3 60 CX = 100 pF 5.0 0.5 39 RX = 1 k 3.3 0.3 1.5 CX = 0.01 F 5.0 0.5 1.2 tw (L) ( CLR ) Minimum retrigger time (Note) trr Ta = -40 to 85C Typ. tw (H) Minimum clear width Ta = 25C VCC (V) tw (L) Minimum pulse width Note: Test Condition Unit ns ns ns s For TC74VHC123A only AC Characteristics (input: tr = tf = 3 ns) Characteristics Test Condition Symbol VCC (V) Propagation delay time tpLH ( A , B-Q, Q ) tpHL Propagation delay time tpLH ( CLR trigger-Q, Q ) tpHL Propagation delay time tpLH ( CLR -Q, Q ) tpHL Output pulse width Output pulse width error between circuits twOUT 3.3 0.3 5.0 0.5 3.3 0.3 5.0 0.5 3.3 0.3 5.0 0.5 CX = 28 pF 3.3 0.3 RX = 2 k 5.0 0.5 CX = 0.01 F 3.3 0.3 RX = 10 k 5.0 0.5 CX = 0.1 F 3.3 0.3 RX = 10 k 5.0 0.5 Ta = -40 to 85C Ta = 25C CL (pF) Min Typ. Max Min Max 15 13.4 20.6 1.0 24.0 50 15.9 24.1 1.0 27.5 15 8.1 12.0 1.0 14.0 50 9.6 14.0 1.0 16.0 15 14.5 22.4 1.0 26.0 50 17.0 25.9 1.0 29.5 15 8.7 12.9 1.0 15.0 50 10.2 14.9 1.0 17.0 15 10.3 15.8 1.0 18.5 50 12.8 19.3 1.0 22.0 15 6.3 9.4 1.0 11.0 50 7.8 11.4 1.0 13.0 160 240 300 133 200 240 90 100 110 90 110 90 100 110 90 110 0.9 1.0 1.1 0.9 1.1 0.9 1.0 1.1 0.9 1.1 50 50 50 Unit ns ns ns ns s ms twOUT 1 % Input capacitance CIN 4 10 10 pF Power dissipation capacitance CPD 73 pF (in same package) Note: (Note) 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: %) 9 2014-03-01 TC74VHC123,221AF/AFT/AFK trr - VCC Characteristics (typ.) (TC74VHC123A) twOUT - CX Characteristics (typ.) VCC = 4.5 V CL = 50 pF Ta = 25C (s) RX = 1 M Minimum retrigger time trr Output pulse width twOUT (s) 103 RX = 100 k 102 10 CX = 0.01 F 1 CX = 1000 pF 0.1 CX = 100 pF RX = 10 k 10 0.01 RX = 1 k 0 1 2 3 Supply voltage 1 10-1 10 2 103 4 5 VCC (V) 6 104 External capacitor CX (pF) Output pulse width constant K Output Pulse Width Constant K - Supply Voltage (typ.) (external resistor (RX) = 10 k: twOUT = K*CX*RX) 1.2 CX = 1000 pF 1.1 CX = 0.01 F 1.0 CX = 1 F, CX = 0.1 F 2 3 Supply voltage 4 5 VCC 6 (V) Input Equivalent Circuit INPUT 10 2014-03-01 TC74VHC123,221AF/AFT/AFK Package Dimensions Weight: 0.18 g (typ.) 11 2014-03-01 TC74VHC123,221AF/AFT/AFK Package Dimensions Weight: 0.06 g (typ.) 12 2014-03-01 TC74VHC123,221AF/AFT/AFK Package Dimensions Weight: 0.02 g (typ.) 13 2014-03-01 TC74VHC123,221AF/AFT/AFK RESTRICTIONS ON PRODUCT USE * Toshiba Corporation, and its subsidiaries and affiliates (collectively "TOSHIBA"), reserve the right to make changes to the information in this document, and related hardware, software and systems (collectively "Product") without notice. * This document and any information herein may not be reproduced without prior written permission from TOSHIBA. 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