SN54221, SN54LS221, SN74221, SN74LS221 DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS SDLS213A - DECEMBER 1983 - REVISED FEBRUARY 1998 D D TYPE 21 SN74221 28 SN54LS221 49 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 VCC 1Rext/Cext 1Cext 1Q 2Q 2CLR 2B 2A SN54LS221 . . . FK PACKAGE (TOP VIEW) MAXIMUM OUTPUT PULSE LENGTH(S) SN54221 SN74LS221 1A 1B 1CLR 1Q 2Q 2Cext 2Rext/Cext GND 1B 1A NC VCC 1R ext /Cext D SN54221, SN54LS221 . . . J OR W PACKAGE SN74221 . . . N PACKAGE SN74LS221 . . . D, DB, OR N PACKAGE (TOP VIEW) 1CLR 1Q NC 2Q 2Cext 70 description The '221 and 'LS221 devices are monolithic dual multivibrators with performance characteristics virtually identical to those of the '121 devices. Each multivibrator features a negative-transitiontriggered input and a positive-transition-triggered input, either of which can be used as an inhibit input. 4 3 2 1 20 19 18 5 17 6 16 7 15 8 14 9 10 11 12 13 1Cext 1Q NC 2Q 2CLR GND NC 2A 2B D Dual Versions of Highly Stable SN54121 and SN74121 One Shots SN54221 and SN74221 Demonstrate Electrical and Switching Characteristics That Are Virtually Identical to the SN54121 and SN74121 One Shots Pinout Is Identical to the SN54123, SN74123, SN54LS123, and SN74LS123 Overriding Clear Terminates Output Pulse Package Options Include Plastic Small-Outline (D), Shrink Small-Outline (DB) Packages, Ceramic Chip Carriers (FK) and Flat Packs (W), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs 2R ext/Cext D NC - No internal connection Pulse triggering occurs at a particular voltage level and is not directly related to the transition time of the input pulse. Schmitt-trigger input circuitry (TTL hysteresis) for B input allows jitter-free triggering from inputs with transition rates as slow as 1 V/s, providing the circuit with excellent noise immunity, typically of 1.2 V. A high immunity to VCC noise, typically of 1.5 V, is also provided by internal latching circuitry. Once fired, the outputs are independent of further transitions of the A and B inputs and are a function of the timing components, or the output pulses can be terminated by the overriding clear. Input pulses can be of any duration relative to the output pulse. Output pulse length can be varied from 35 ns to the maximums shown in the above table by choosing appropriate timing components. With Rext = 2 k and Cext = 0, an output pulse typically of 30 ns is achieved, which can be used as a dc-triggered reset signal. Output rise and fall times are TTL compatible and independent of pulse length. Typical triggering and clearing sequences are shown as a part of the switching characteristics waveforms. Pulse-width stability is achieved through internal compensation and is virtually independent of VCC and temperature. In most applications, pulse stability is limited only by the accuracy of external timing components. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Copyright 1998, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 1 SN54221, SN54LS221, SN74221, SN74LS221 DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS SDLS213A - DECEMBER 1983 - REVISED FEBRUARY 1998 description (continued) Jitter-free operation is maintained over the full temperature and VCC ranges for more than six decades of timing capacitance (10 pF to 10 F) and more than one decade of timing resistance (2 k to 30 k for the SN54221, 2 k to 40 k for the SN74221, 2 k to 70 k for the SN54LS221, and 2 k to 100 k for the SN74LS221). Throughout these ranges, pulse width is defined by the relationship: tw(out) = CextRext In2 0.7 CextRext. In circuits where pulse cutoff is not critical, timing capacitance up to 1000 F and timing resistance as low as 1.4 k can be used. Also, the range of jitter-free output pulse widths is extended if VCC is held to 5 V and free-air temperature is 25C. Duty cycles as high as 90% are achieved when using maximum recommended RT. Higher duty cycles are available if a certain amount of pulse-width jitter is allowed. The variance in output pulse width from device to device typically is less than 0.5% for given external timing components. An example of this distribution for the '221 is shown in Figure 3. Variations in output pulse width versus supply voltage and temperature for the '221 are shown in Figures 4 and 5, respectively. Pin assignments for these devices are identical to those of the SN54123/SN74123 or SN54LS123/SN74LS123 so that the '221 or 'LS221 devices can be substituted for those products in systems not using the retrigger by merely changing the value of Rext and/or Cext; however, the polarity of the capacitor must be changed. The SN54221 and SN54LS221 are characterized for operation over the full military temperature range of -55C to 125C. The SN74221 and SN74LS221 are characterized for operation from 0C to 70C. FUNCTION TABLE (each monostable multivibrator) INPUTS OUTPUTS CLR A B Q Q L X X L H X H X L H L X X L H L H H H L H Pulsed-output patterns are tested during AC switching at 25C with Rext = 2 k, and Cext = 80 pF. This condition is true only if the output of the latch formed by the two NAND gates has been conditioned to the logic 1 state prior to CLR going high. This latch is conditioned by taking either A high or B low while CLR is inactive (high). 2 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 SN54221, SN54LS221, SN74221, SN74LS221 DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS SDLS213A - DECEMBER 1983 - REVISED FEBRUARY 1998 logic symbol 1A 1B 1CLR 1 & 13 3 R 14 1Cext 15 1Rext/Cext 2A 2B & 7 1Q 1 5 6 1Q RX/CX 10 11 2Rext/Cext 4 CX 9 2CLR 2Cext 1 2 R 12 CX 2Q 2Q RX/CX This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, DB, J, N, and W packages. timing component connections VCC Rext To Cext Terminal To Rext/Cext Terminal NOTE: Due to the internal circuit, the Rext/Cext terminal is never more positive than the Cext terminal. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 3 SN54221, SN54LS221, SN74221, SN74LS221 DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS SDLS213A - DECEMBER 1983 - REVISED FEBRUARY 1998 schematics of inputs and outputs SN54/74221 EQUIVALENT OF EACH INPUT TYPICAL OF ALL OUTPUTS VCC VCC 100 NOM Req Input Output A Input: Req = 4 k NOM B, CLR Input: Req = 2 k NOM SN54/74LS221 EQUIVALENT OF EACH INPUT TYPICAL OF ALL OUTPUTS VCC VCC 120 NOM Req Input Output A Input: Req = 25 k NOM B Input: Req = 15.4 k NOM CLR: Req = 12.5 k NOM 4 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 SN54221, SN54LS221, SN74221, SN74LS221 DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS SDLS213A - DECEMBER 1983 - REVISED FEBRUARY 1998 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage range, VI (see Note 1): 'LS221 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V '221 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Package thermal impedance, JA (see Note 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113C/W DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78C/W Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65C to 150C Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed. 2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace length of zero recommended operating conditions SN54221 VCC VIH Supply voltage High-level input voltage A input VIL IOH Low-level input voltage A input IOL v/t Rise or fall of input pulse rate SN74221 MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.75 5 5.25 2 2 UNIT V V 0.8 0.8 High-level output current -800 -800 A Low-level output current 16 16 mA B input 1* A input 1* TA Operating free-air temperature -55 On products compliant to MIL-PRF-38535, this parameter is not production tested. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 1 V/s 1 125 0 V V/s 70 C 5 SN54221, SN54LS221, SN74221, SN74LS221 DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS SDLS213A - DECEMBER 1983 - REVISED FEBRUARY 1998 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VT+ Positive-going threshold voltage, B input VCC = MIN VT- Negative-going threshold voltage, B input VCC = MIN MIN 1.55 VIK VOH VCC = MIN, VCC = MIN, II = -12 mA IOH = -800 A VOL II VCC = MIN, VCC = MAX, IOL = 16 mA VI = 5.5 V A input IIH CLR, B input A input IIL CLR, B input IOS ICC VCC = MAX MAX, VI = 2 2.4 4V VCC = MAX MAX, VI = 0 0.4 4V VCC = MAX Quiescent Triggered SN54221 TYP MAX 0.8* 1.35 2.4 3.4 MIN 2* SN74221 TYP MAX 1.55 0.8 1.35 2.4 3.4 -1.5 0.2 -20 VCC = MAX 2 0.2 1 1 40 80 80 -1.6 -1.6 -3.2 -3.2 -18 V V 0.4 40 -55 V V -1.5 0.4 UNIT -55 26 50* 26 50 46 80* 46 80 V mA A mA mA mA On products compliant to MIL-PRF-38535, this parameter is not production tested. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. All typical values are at VCC = 5 V, TA = 25C. Not more than one output should be shorted at a time and the duration of the short circuit should not exceed one second. timing requirements over recommended ranges of supply voltage and operating free-air temperature tw Pulse duration tsu Setup time, inactive-state Rext External timing resistance Cext External timing capacitance Output duty cycle POST OFFICE BOX 655303 SN74221 MIN MIN MAX A or B input 50 50 CLR 20 20 CLR 15 15 MAX ns 1.4* 30* 1.4 40 k 0* 1000* 0 1000 F 67% 67% Rext = MAX Rext 90% 90% * DALLAS, TEXAS 75265 UNIT ns Rext = 2 k On products compliant to MIL-PRF-38535, this parameter is not production tested. Inactive-state setup time is also referred to as recovery time. 6 SN54221 SN54221, SN54LS221, SN74221, SN74LS221 DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS SDLS213A - DECEMBER 1983 - REVISED FEBRUARY 1998 switching characteristics VCC = 5 V, RL = 400 , TA = 25_C (see Figures 1 and 2) PARAMETER tPLH tPHL tPHL tPLH tw FROM (INPUT) TO (OUTPUT) TEST CONDITIONS SN54221 MIN A B Q Cext = 80 pF pF, A B Rext = 2 k Q MAX TYP MAX 45 35 70 45 70 55 35 55 50 80 50 80 40 65 40 65 Q CLR A or B Q Q or Q SN74221 TYP MIN 27 27 40 40 Cext = 80 pF pF, Rext = 2 k Cext = 80 pF, Rext = 2 k 70 110 150 70 110 150 Cext = 0, Rext = 2 k 17 30 50 17 30 50 Cext = 100 pF, Rext = 10 k 650 700 750 650 700 750 Cext = 1 F, Rext = 10 k 6.5* 7 7.5* 6.5 7 7.5 UNIT ns ns ns ms On products compliant to MIL-PRF-38535, this parameter is not production tested. recommended operating conditions SN54LS221 VCC VIH Supply voltage High-level input voltage A input VIL IOH Low-level input voltage A input IOL v/t Rise or fall of input pulse rate SN74LS221 MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.75 5 5.25 2 2 UNIT V V 0.7 0.8 High-level output current -400 -400 A Low-level output current 4 8 mA B input A input 1* 1* TA Operating free-air temperature -55 On products compliant to MIL-PRF-38535, this parameter is not production tested. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 125 V 1 V/s 1 V/s 0 70 C 7 SN54221, SN54LS221, SN74221, SN74LS221 DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS SDLS213A - DECEMBER 1983 - REVISED FEBRUARY 1998 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VT+ Positive-going threshold voltage, B input VCC = MIN VT- Negative-going threshold voltage, B input VCC = MIN VIK VOH II = -18 mA IOH = -400 A VOL VCC = MIN IOL = 4 mA IOL = 8 mA II VCC = MAX, VI = 7 V VCC = MAX, VI = 2.7 V A input IIL CLR, B input IOS ICC VCC = MAX MAX, MIN 1 VCC = MIN, VCC = MIN, IIH SN54LS221 TYP MAX TEST CONDITIONS Triggered 0.9 2.5 3.4 UNIT 1 V 2* 0.8 0.9 2.7 3.4 -1.5 0.25 VI = 0 0.4 4V -20 VCC = MAX 2 V -1.5 0.4 0.4 0.35 0.5 mA A 20 20 -0.4 -0.8 -0.8 -20 V 0.1 -0.4 -100 V V 0.25 0.1 VCC = MAX Quiescent 0.7* SN74LS221 TYP MAX MIN -100 4.7 11 4.7 11 19 27* 19 27 mA mA mA On products compliant to MIL-PRF-38535, this parameter is not production tested. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. All typical values are at VCC = 5 V, TA = 25C. Not more than one output should be shorted at a time and the duration of the short circuit should not exceed one second. timing requirements over recommended ranges of supply voltage and operating free-air temperature SN54LS221 MIN tw Pulse duration tsu Setup time, inactive state Rext External timing resistance Cext External timing capacitance POST OFFICE BOX 655303 MIN 50 50 CLR 40 40 CLR 15 15 On products compliant to MIL-PRF-38535, this parameter is not production tested. Inactive-state setup time is also referred to as recovery time. 8 SN74LS221 A or B RT = 2 k RT = MAX Rext Output duty cycle MAX * DALLAS, TEXAS 75265 MAX UNIT ns ns 1.4* 70* 1.4 100 k 0* 1000* 0 1000 F 50% 50% 90% 90% SN54221, SN54LS221, SN74221, SN74LS221 DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS SDLS213A - DECEMBER 1983 - REVISED FEBRUARY 1998 switching characteristics VCC = 5 V, RL = 2 k, TA = 25_C (see Figures 1 and 2) PARAMETER tPLH tPHL tPHL tPLH tw FROM (INPUT) TO (OUTPUT) TEST CONDITIONS SN54LS221 MIN A B Q Cext = 80 pF pF, A B Rext = 2 k Q Q CLR A or B Q Q or Q SN74LS221 TYP MAX 45 35 MIN TYP MAX 70 45 70 55 35 55 50 80 50 80 40 65 40 65 35 55 35 55 44 65 44 65 Cext = 80 pF pF, Rext = 2 k Cext = 80 pF, Rext = 2 k 70 120 150 70 120 150 Cext = 0, Rext = 2 k 20 47 70 20 47 70 Cext = 100 pF, Rext = 10 k 670 740 810 670 740 810 Cext = 1 F, Rext = 10 k 6* 6.9 7.5* 6 6.9 7.5 UNIT ns ns ns ms On products compliant to MIL-PRF-38535, this parameter is not production tested. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 9 SN54221, SN54LS221, SN74221, SN74LS221 DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS SDLS213A - DECEMBER 1983 - REVISED FEBRUARY 1998 PARAMETER MEASUREMENT INFORMATION tw 3V B 0V 60 ns 3V CLR 0V tPLH tPHL VOH Q VOL tPHL tPLH VOH Q VOL CONDITION 1: TRIGGER FROM B, THEN CLR 3V B 0V 60 ns 3V CLR 0V VOH Q VOL CONDITION 2: TRIGGER FROM B, THEN CLR 3V B 0V 50 ns 0 tsu 3V CLR 0V tw Triggered VOH Q VOL Not Triggered CONDITION 3: CLR OVERRIDING B, THEN TRIGGER FROM B A is low. Figure 1. Switching Characteristics 10 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 SN54221, SN54LS221, SN74221, SN74LS221 DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS SDLS213A - DECEMBER 1983 - REVISED FEBRUARY 1998 PARAMETER MEASUREMENT INFORMATION 3V B 0V 50 ns 50 ns 3V CLR 0V VOH Q VOL CONDITION 4: TRIGGERING FROM POSITIVE TRANSITION OF CLR tw 3V A 0V 60 ns 3V CLR 0V tPLH tPHL VOH Q VOL tPHL tPLH VOH Q VOL CONDITION 5: TRIGGER FROM A, THEN CLR 3V A 0V tw VOH Q VOL tw VOH Q VOL CONDITION 6: TRIGGER FROM A A is low. B and CLR are high. NOTES: A. Input pulses are supplied by generators having the following characteristics: PRR 1 MHz, ZO 50; for SN54/74221, tr 7 ns, tf 7 ns, for SN54/74LS221, tr 15 ns, tf 6 ns. B. All measurements are made between the 1.5-V points of the indicated transitions for the SN54/74221 or between the 1.3-V points for the SN54/74LS221. Figure 1. Switching Characteristics (Continued) POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 11 SN54221, SN54LS221, SN74221, SN74LS221 DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS SDLS213A - DECEMBER 1983 - REVISED FEBRUARY 1998 PARAMETER MEASUREMENT INFORMATION VCC Test Point RL From Output Under Test (see Note B) CL = 15 pF (see Note A) High-Level Pulse tw Low-Level Pulse LOAD CIRCUIT FOR BI-STATE TOTEM-POLE OUTPUTS VOLTAGE WAVEFORMS PULSE DURATIONS 3V Input tPLH 3V Timing Input VOH In-Phase Output 0V tsu th tPHL 3V Data Input 0V 0V tPHL VOL tPLH VOH Out-of-Phase Output VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES VOLTAGE WAVEFORMS SETUP AND HOLD TIMES NOTES: A. B. C. D. CL includes probe and jig capacitance. All diodes are 1N3064 or equivalent. In the examples above, the phase relationships between inputs and outputs have been chosen arbitrarily. All input pulses are supplied by generators having the following characteristics: PRR 1 MHz, ZO 50 and, for SN54/74221, tr 7 ns, tf 7 ns, for SN54/74LS221, tr 15 ns, tf 6 ns. E. All measurements are made between the 1.5-V points of the indicated transitions for the SN54/74221 or between the 1.3-V points for the SN54/74LS221. Figure 2. Load Circuits and Voltage Waveforms 12 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 SN54221, SN54LS221, SN74221, SN74LS221 DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS SDLS213A - DECEMBER 1983 - REVISED FEBRUARY 1998 TYPICAL CHARACTERISTICS (SN54/74221 ONLY) VARIATION IN OUTPUT PULSE vs SUPPLY VOLTAGE DISTRIBUTION OF UNITS FOR OUTPUT PULSE 1 Relative Frequency of Occurrence t w - Variation in Output Pulse - % VCC = 5 V TA = 25C Median +0.5% Cext = 60 pF Rext = 10 k TA = 25C 0.5 tw 420 ns at VCC = 5 V 0 - 0.5 Median +0.5% -1 4.5 Median 4.75 Figure 3 Figure 4 VARIATION IN OUTPUT PULSE vs FREE-AIR TEMPERATURE OUTPUT PULSE vs TIMING RESISTOR VALUE 1 10 ms VCC = 5 V Cext = 60 pF Rext = 10 k Cext = 1 F 1 ms Cext = 0.1 F 0.5 t w - Output Pulse t w - Variation in Output Pulse - % 5.5 VCC - Supply Voltage - V tw - Output Pulse tw 420 ns at TA = 25C 0 100 s Cext = 0.01 F 10 s Cext = 1000 pF 1 s Cext = 100 pF - 0.5 Cext = 10 pF 100 ns -1 -75 -50 5.25 5 VCC = 5 V TA = 25C 10 ns -25 0 25 50 75 100 125 1 2 TA - Free-Air Temperature - C See Note A 4 7 10 20 40 70 100 Rext - Timing Resistor Value - k Figure 5 Figure 6 Data for temperatures below 0C and above 70C, and for supply voltages below 4.75 V and above 5.25 V are applicable for the SN54221 only. NOTE A: These values of resistance exceed the maximum recommended for use over the full military temperature range of the SN54221. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 13 IMPORTANT NOTICE Texas Instruments (TI) reserves the right to make changes to its products or to discontinue any semiconductor product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current and complete. TI warrants performance of its semiconductor products and related software to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. 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TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. Nor does TI warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. Copyright 1998, Texas Instruments Incorporated