CD74HC4538QPWRG4Q1

CD74HC4538-Q1 HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE PRECISION MONOSTABLE MULTIVIBRATOR SCLS595A − NOVEMBER 2004 − REVISED APRIL 2008 D Qualified for Automotive Applications D Retriggerable/Resettable Capability D Trigger and Reset Propagation Delays D D D D D D D Independent of RX, CX Triggering From the Leading or Trailing Edge Q and Q Buffered Outputs Available Separate Resets Wide Range of Output Pulse Widths Schmitt-Trigger Input on A and B Inputs Retrigger Time Is Independent of CX Fanout (Over Temperature Range) − Standard Outputs . . . 10 LSTTL Loads − Bus Driver Outputs . . . 15 LSTTL Loads D Balanced Propagation Delay and Transition Times D Significant Power Reduction Compared to D D LSTTL Logic ICs VCC Voltage = 2 V to 6 V High Noise Immunity NIL or NIH = 30% of VCC, VCC = 5 V M OR PW PACKAGE (TOP VIEW) 1CX 1RXCX 1R 1A 1B 1Q 1Q GND description/ordering information 1 16 2 15 3 14 4 13 5 12 6 11 7 10 VCC 2CX 2RXCX 2R 2A 2B 2Q 2Q 8 9 The CD74HC4538 is a dual retriggerable/resettable precision monostable multivibrator for fixed-voltage timing applications. An external resistor (RX) and external capacitor (CX) control the timing and accuracy for the circuit. Adjustment of RX and CX provides a wide range of output pulse widths from the Q and Q terminals. The propagation delay from trigger input-to-output transition and the propagation delay from reset input-to-output transition are independent of RX and CX. Leading-edge triggering (A) and trailing-edge triggering (B) inputs are provided for triggering from either edge of the input pulse. An unused A input should be tied to GND and an unused B input should be tied to VCC. On power up, the IC is reset. Unused resets and sections must be terminated. In normal operation, the circuit retriggers on the application of each new trigger pulse. To operate in the nontriggerable mode, Q is connected to B when leading-edge triggering (A) is used, or Q is connected to A when trailing-edge triggering (B) is used. The period (τ) can be calculated from τ = (0.7) RX, CX; RMIN is 5 kΩ. CMIN is 0 pF. ORDERING INFORMATION{ PACKAGE‡ TA −40°C 40°C to 125°C ORDERABLE PART NUMBER TOP-SIDE MARKING SOIC − M Tape and reel CD74HC4538QM96Q1 HC4538M TSSOP − PW Tape and reel CD74HC4538QPWRQ1 HC4538M † For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at http://www.ti.com. ‡ Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging. 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  2008, 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. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 CD74HC4538-Q1 HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE PRECISION MONOSTABLE MULTIVIBRATOR SCLS595A − NOVEMBER 2004 − REVISED APRIL 2008 FUNCTION TABLE OUTPUTS INPUTS R A B Q Q L X X L H X H X L H X X L L H H L ↓ H ↑ H NOTE: H = High voltage level L = Low voltage level ↑ = Transition from low to high level ↓ = Transition from high to low level = one high-level pulse = one low-level pulse X = Irrelevant logic diagram (positive logic) 16 VCC VCC VCC VCC RX 2(14) CX R1 + Comp II 6(10) Q − 1(15) R2 VCC VCC 8 7(9) Q High Z 3(13) VCC 4(12) D R1 5(11) 2 CL R2 FF CL Q Q POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 CD74HC4538-Q1 HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE PRECISION MONOSTABLE MULTIVIBRATOR SCLS595A − NOVEMBER 2004 − REVISED APRIL 2008 FUNCTIONAL TERMINAL CONNECTIONS VCC TO TERMINAL NUMBER GND TO TERMINAL NUMBER INPUT PULSE TO TERMINAL NUMBER MONO1 MONO2 MONO1 MONO1 MONO2 3, 5 11, 13 4 12 Leading-edge trigger/nonretriggerable 3 13 4 12 Trailing-edge trigger/retriggerable 3 13 5 11 Trailing-edge trigger/nonretriggerable 3 13 5 11 FUNCTION Leading-edge trigger/retriggerable MONO2 4 12 OTHER CONNECTIONS MONO1 MONO2 5−7 11−9 4−6 12−10 NOTES: 1. A retriggerable one-shot multivibrator has an output pulse width that is extended one full time period (T) after application of the last trigger pulse. 2. A nontriggerable one-shot multivibrator has a time period (T) referenced from the application of the first trigger pulse. T Input Pulse Train Retriggerable Mode Pulse Width (A Mode) T Nonretriggerable Mode Pulse Width (A Mode) absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V Input clamp current, IIK (VI < −0.5 V or VI > VCC + 0.5 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Output clamp current, IOK (VO < −0.5 V or VO > VCC + 0.5 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Switch current per output pin, IO (VO > −0.5 V or VO < VCC + 0.5 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Package thermal impedance, θJA (see Note 2): M package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73°C/W PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108°C/W Maximum junction temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C Lead temperature (during soldering): At distance 1/16 ± 1/32 inch (1,59 ± 0,79 mm) from case for 10 s max . . . . . . . . . . . . . . . . . . . . . . . 300°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C † 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. All voltages are referenced to GND, unless otherwise specified. 2. The package thermal impedance is calculated in accordance with JESD 51-7. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 CD74HC4538-Q1 HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE PRECISION MONOSTABLE MULTIVIBRATOR SCLS595A − NOVEMBER 2004 − REVISED APRIL 2008 recommended operating conditions (see Note 3) VCC Supply voltage VIH High-level High level input voltage VCC = 2 V VCC = 4.5 V VCC = 6 V MIN MAX 2 6 UNIT V 1.5 3.15 V 4.2 VCC = 2 V 0.5 VCC = 4.5 V 1.35 VIL Low-level Low level input voltage VI Input voltage 0 VCC V VO Output voltage 0 VCC V VCC = 2 V 0 1000 VCC = 4.5 V 0 500 VCC = 6 V 0 400 VCC = 2 V 0 Unlimited VCC = 4.5 V 0 Unlimited VCC = 6 V 0 Unlimited VCC = 6 V Reset input tt Input transition (rise and fall) time Trigger inputs A or B V 1.8 ns RX External timing resistor (see Note 4) 5 kΩ CX External timing capacitor (see Note 4) 0 F TA Operating free-air temperature −40 125 °C NOTES: 3. All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004. 4. The maximum allowable values of RX and CX are a function of leakage of capacitor CX, leakage of the CD74HC4538, and leakage due to board layout and surface resistance. Values of RX and CX should be chosen so that the maximum current into pin 2 or pin 14 is 30 mA. Susceptibility to externally induced noise signals may occur for RX > 1 MΩ. 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 CD74HC4538-Q1 HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE PRECISION MONOSTABLE MULTIVIBRATOR SCLS595A − NOVEMBER 2004 − REVISED APRIL 2008 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS CMOS loads VOH CMOS loads II VI = VCC or GND ICC VI = VCC or GND CIN CL = 50 pF TA = 25°C TA = −40°C TO 85°C TA = −40°C TO 125°C MIN MIN MIN MAX MAX 1.9 1.9 1.9 4.5 V 4.4 4.4 4.4 6V 5.9 5.9 5.9 −4 4.5 V 3.98 3.84 3.7 −5.2 6V 5.48 −0.02 0.02 5.34 UNIT MAX V 5.2 2V 0.1 0.1 0.1 0.02 4.5 V 0.1 0.1 0.1 6V 0.1 0.1 0.1 4 4.5 V 0.26 0.33 0.4 5.2 6V 0.26 0.33 0.4 VI = VIH or VIL TTL loads VCC 2V VI = VIH or VIL TTL loads VOL IO (mA) A, B, R 6V ±0.1 ±1 ±1 RXCX (see Note 5) 6V ±0.05 ±0.5 ±0.5 V A µA Quiescent 0 6V 8 80 160 µA Active, Q = high, Pins 2 and 14 at VCC/4 0 6V 0.6 0.8 1 mA 10 10 10 pF NOTE 5: When testing IIL, the Q output must be high. If Q is low (device not triggered), the pullup P device is ON and the low-resistance path from VDD to the test pin causes a current far exceeding the specification. timing requirements over recommended operating free-air temperature range (unless otherwise noted) (see Figure 1) PARAMETER TA = 25°C VCC MIN tw tsu trr Input pulse width Reset setup time Retrigger time (see Figure 4) TYP MAX TA = −40°C TO 85°C TA = −40°C TO 125°C MIN MIN MAX 2V 80 100 120 4.5 V 16 20 24 6V 14 17 20 2V 5 5 5 4.5 V 5 5 5 6V 5 5 5 5V Output pulse-width match, same package POST OFFICE BOX 655303 UNIT MAX ns ns 175 ns ±1 % • DALLAS, TEXAS 75265 5 CD74HC4538-Q1 HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE PRECISION MONOSTABLE MULTIVIBRATOR SCLS595A − NOVEMBER 2004 − REVISED APRIL 2008 switching characteristics over recommended operating free-air temperature range (unless otherwise noted) (see Figure 1) PARAMETER FROM (INPUT) A B A, TO (OUTPUT) Q or Q LOAD CAPACITANCE CL = 50 pF CL = 15 pF tpd R Q or Q CL = 50 pF CL = 15 pF tt τ† † CL = 50 pF CL = 50 pF TA = 25°C VCC MIN TYP MAX TA = −40°C TO 85°C TA = −40°C TO 125°C MIN MIN MAX 2V 250 315 375 4.5 V 50 63 75 6V 43 54 64 2V 250 315 375 4.5 V 50 63 75 6V 43 54 64 2V 75 95 110 4.5 V 15 19 22 6V 13 16 19 5V UNIT MAX 21 5V ns 21 3V 0.64 0.78 0.612 0.812 0.605 0.819 5V 0.63 0.77 0.602 0.798 0.595 0.805 ns ms Output pulse width with RX = 10 kΩ and CX = 0.1 µF operating characteristics, VCC = 5 V, TA = 25°C, input tr, tf = 6 ns, CL = 15 pF PARAMETER Cpd Power dissipation capacitance (see Note 6) NOTE 6: Cpd is used to determine the dynamic power consumption, per one shot. PD = (Cpd + CX) VCC2 fI Σ(CL VCC2 fO) fI = input frequency fO = output frequency CL = output load capacitance CX = external capacitance VCC = supply voltage, assuming fI % l/τ 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYP UNIT 136 pF CD74HC4538-Q1 HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE PRECISION MONOSTABLE MULTIVIBRATOR SCLS595A − NOVEMBER 2004 − REVISED APRIL 2008 PARAMETER MEASUREMENT INFORMATION From Output Under Test VCC High-Level Pulse Test Point 50% 50% 0V tw CL = 50 pF (see Note A) VCC Low-Level Pulse 50% 50% 0V LOAD CIRCUIT VOLTAGE WAVEFORMS PULSE DURATIONS VCC Input 50% 50% 0V tPLH VCC Reference Input In-Phase Output 50% 50% 10% 0V tsu Data Input 50% 10% 90% tr tPHL VCC 50% 10% 0 V 90% 90% tr th 90% tPHL Out-of-Phase Output 90% VOLTAGE WAVEFORMS SETUP AND HOLD AND INPUT RISE AND FALL TIMES tPLH 50% 10% tf tf VOH 50% 10% VOL tf 50% 10% 90% VOH VOL tr VOLTAGE WAVEFORMS PROPAGATION DELAY AND OUTPUT TRANSITION TIMES NOTES: A. CL includes probe and test-fixture capacitance. B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns. C. For clock inputs, fmax is measured when the input duty cycle is 50%. D. The outputs are measured one at a time, with one input transition per measurement. E. tPLH and tPHL are the same as tpd. Figure 1. Load Circuit and Voltage Waveforms POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 CD74HC4538-Q1 HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE PRECISION MONOSTABLE MULTIVIBRATOR SCLS595A − NOVEMBER 2004 − REVISED APRIL 2008 TYPICAL CHARACTERISTICS HC4538 TA = 25°C 0.7 K Factor 10 kΩ, 10 nF 0.69 10 kΩ ,100 nF 100 kΩ, 100 nF 0.68 100 kΩ, 10 nF 0.67 2 3 4 4.5 5 5.5 6 VCC − DC Supply Voltage − V Figure 2. K Factor vs DC Supply Voltage 1.3 1.2 K Factor 1.1 1 0.9 0.8 2 kΩ 0.7 10 kΩ 100 kΩ 0.6 10 102 103 104 105 t rr , TYP MIN Retrigger Time − ns 104 HC4538 VCC = 5 V TA = 25°C TA = 25°C RX = 10 kΩ 103 VCC = 4.5 V 102 VCC = 5 V 10 CX − Timing Capacitance − pF Figure 3. K Factor vs CX 8 POST OFFICE BOX 655303 102 103 CX − Timing Capacitance − pF Figure 4. Minimum Retrigger Time vs Timing Capacitance • DALLAS, TEXAS 75265 104 CD74HC4538-Q1 HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE PRECISION MONOSTABLE MULTIVIBRATOR SCLS595A − NOVEMBER 2004 − REVISED APRIL 2008 TYPICAL APPLICATION DATA power-down mode During a rapid power-down condition (as would occur with a power-supply short circuit with a poorly filtered power supply), the energy stored in CX could discharge into pin 2 or pin 14. To avoid possible device damage in this mode when CX is w 0.5 µF, a protection diode with a 1-A rating or higher (1N5395 or equivalent) and a separate ground return for CX should be provided (see Figure 5). An alternate protection method is shown in Figure 6, where a 51-Ω current-limiting resistor is inserted in series with CX . Note that a small pulse-duration decrease occurs, however, and RX must be increased appropriately to obtain the originally desired pulse duration. VCC VCC RX RX 2 (14) 16 2 (14) 16 1 (15) 8 51 Ω CX ≥0.5 µF 1 (15) CX ≥0.5 µF 8 Figure 5. Rapid-Power-Down Protection Circuit POST OFFICE BOX 655303 Figure 6. Alternative Rapid-Power-Down Protection Circuit • DALLAS, TEXAS 75265 9 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) CD74HC4538QM96G4Q1 ACTIVE SOIC D 16 2500 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 125 HC4538M CD74HC4538QPWRG4Q1 ACTIVE TSSOP PW 16 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 125 HC4538M CD74HC4538QPWRQ1 ACTIVE TSSOP PW 16 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 125 HC4538M (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of