SN74HCT157N


        


SCLS071D − NOVEMBER 1988 − REVISED OCTOBER 2003 D Operating Voltage Range of 4.5 V to 5.5 V D High-Current Outputs Drive Up To 15 LSTTL Loads D Typical tpd = 15 ns D Low Power Consumption, 80-µA Max ICC D D D D ±6-mA Output Drive at 5 V Low Input Current of 1 µA Max Inputs Are TTL-Voltage Compatible Buffered Inputs and Outputs SN54HCT157 . . . J OR W PACKAGE SN74HCT157 . . . D OR N PACKAGE (TOP VIEW) 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 1A A/B NC VCC G VCC G 4A 4B 4Y 3A 3B 3Y 1B 1Y NC 2A 2B 4 3 2 1 20 19 18 5 17 6 16 7 15 8 14 9 10 11 12 13 4A 4B NC 4Y 3A 2Y GND NC 3Y 3B A/B 1A 1B 1Y 2A 2B 2Y GND SN54HCT157 . . . FK PACKAGE (TOP VIEW) NC − No internal connection description/ordering information These data selectors/multiplexers contain inverters and drivers to supply full data selection to the four output gates. A separate strobe (G) input is provided. A 4-bit word is selected from one of two sources and is routed to the four outputs. ORDERING INFORMATION PACKAGE† TA PDIP − N −40°C to 85°C −55°C −55 C to 125 125°C C ORDERABLE PART NUMBER TOP-SIDE MARKING Tube of 25 SN74HCT157N Tube of 40 SN74HCT157D Reel of 2500 SN74HCT157DR Reel of 250 SN74HCT157DT CDIP − J Tube of 25 SNJ54HCT157J SNJ54HCT157J CFP − W Tube of 150 SNJ54HCT157W SNJ54HCT157W SOIC − D SN74HCT157N HCT157 LCCC − FK Tube of 55 SNJ54HCT157FK SNJ54HCT157FK † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. 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  2003, Texas Instruments Incorporated 


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SCLS071D − NOVEMBER 1988 − REVISED OCTOBER 2003 FUNCTION TABLE INPUTS OUTPUT Y DATA STROBE G SELECT A/B A B H X X X L L L L X L L L H X H L H X L L L H X H H logic diagram (positive logic) 1A 2 4 1B 2A 3 5 7 2B 3A 6 4A 10 G A/B 13 15 1 Pin numbers shown are for the D, J, N, and W packages. 2 3Y 14 12 4B 2Y 11 9 3B 1Y POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 4Y 

        


SCLS071D − NOVEMBER 1988 − REVISED OCTOBER 2003 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±35 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±70 mA Package thermal impedance, θJA (see Note 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67°C/W 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. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance is calculated in accordance with JESD 51-7. recommended operating conditions (see Note 3) SN54HCT157 MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 VCC VIH Supply voltage VIL VI Low-level input voltage Input voltage 0 VO tt Output voltage 0 High-level input voltage VCC = 4.5 V to 5.5 V VCC = 4.5 V to 5.5 V SN74HCT157 2 2 Input transition (rise and fall) time V V 0.8 VCC VCC UNIT 0 0 500 0.8 V VCC VCC V 500 ns V TA Operating free-air temperature −55 125 −40 85 °C NOTE 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. electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCC VOH VI = VIH or VIL IOH = −20 µA IOH = −6 mA 4.5 V VOL VI = VIH or VIL IOL = 20 µA IOL = 6 mA 4.5 V II ICC VI = VCC or 0 VI = VCC or 0, ∆ICC† IO = 0 One input at 0.5 V or 2.4 V, Other inputs at 0 or VCC Ci 5.5 V TA = 25°C MIN TYP MAX 4.5 V to 5.5 V MIN MAX SN74HCT157 MIN 4.4 4.499 4.4 4.4 3.98 4.3 3.7 3.84 MAX UNIT V 0.001 0.1 0.1 0.1 0.17 0.26 0.4 0.33 ±0.1 ±100 ±1000 ±1000 nA 8 160 80 µA 1.4 2.4 3 2.9 mA 3 10 10* 10 pF 5.5 V 5.5 V SN54HCT157 V * On products compliant to MIL-PRF-38535, this parameter is not production tested. † This is the increase in supply current for each input that is at one of the specified TTL voltage levels, rather than 0 V or VCC.  2 &(!)$'!& "!&"%)& *)!#" & % (!)$'3% !) %1& *'% !( %3%,!*$%&- ')'"%)" '' '& !%) *%"("'!& ')% %1& 1!',- %.' &)#$%& )%%)3% % )1 ! "'&1% !) "!&&#% %% *)!#" /!# &!"%- POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 

        


SCLS071D − NOVEMBER 1988 − REVISED OCTOBER 2003 switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Figure 1) PARAMETER tpd FROM (INPUT) TO (OUTPUT) A or B Y A/B Y G Y tt Any VCC MIN TA = 25°C TYP MAX SN54HCT157 MIN MAX SN74HCT157 MIN MAX 4.5 V 18 28 42 35 5.5 V 15 25 38 32 4.5 V 20 32 48 40 5.5 V 17 29 43 36 4.5 V 18 26 39 33 5.5 V 15 23 35 30 4.5 V 8 15 22 19 5.5 V 7 14 21 17 UNIT ns ns switching characteristics over recommended operating free-air temperature range, CL = 150 pF (unless otherwise noted) (see Figure 1) PARAMETER tpd FROM (INPUT) TO (OUTPUT) A or B Y A/B Y G Y tt Any VCC MIN TA = 25°C TYP MAX SN54HCT157 MIN MAX SN74HCT157 MIN MAX 4.5 V 23 42 63 52 5.5 V 19 38 52 46 4.5 V 24 46 72 58 5.5 V 21 41 61 52 4.5 V 21 39 58 48 5.5 V 19 35 49 43 4.5 V 17 42 63 53 5.5 V 14 38 57 48 UNIT ns ns operating characteristics, TA = 25°C PARAMETER Cpd TEST CONDITIONS Power dissipation capacitance No load  2 &(!)$'!& "!&"%)& *)!#" & % (!)$'3% !) %1& *'% !( %3%,!*$%&- ')'"%)" '' '& !%) *%"("'!& ')% %1& 1!',- %.' &)#$%& )%%)3% % )1 ! "'&1% !) "!&&#% %% *)!#" /!# &!"%- 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYP 12 UNIT pF 

        


SCLS071D − NOVEMBER 1988 − REVISED OCTOBER 2003 PARAMETER MEASUREMENT INFORMATION Input (see Note B) From Output Under Test 3V 1.3 V 1.3 V 0V tPLH Test Point CL = 50 pF (see Note A) Output 1.3 V 10% tPHL 90% 90% tr LOAD CIRCUIT VOH 1.3 V 10% V OL tf VOLTAGE WAVEFORMS PROPAGATION DELAY 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. The outputs are measured one at a time with one input transition per measurement. D. tPLH and tPHL are the same as tpd. Figure 1. Load Circuit and Voltage Waveforms POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 PACKAGE OPTION ADDENDUM www.ti.com 13-Aug-2021 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) SN74HCT157D ACTIVE SOIC D 16 40 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 HCT157 SN74HCT157DE4 ACTIVE SOIC D 16 40 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 HCT157 SN74HCT157DR ACTIVE SOIC D 16 2500 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 HCT157 SN74HCT157DRE4 ACTIVE SOIC D 16 2500 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 HCT157 SN74HCT157DRG4 ACTIVE SOIC D 16 2500 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 HCT157 SN74HCT157DT ACTIVE SOIC D 16 250 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 HCT157 SN74HCT157N ACTIVE PDIP N 16 25 RoHS & Green NIPDAU N / A for Pkg Type -40 to 85 SN74HCT157N (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