SN54HCT157, SN74HCT157 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS SCLS071B – NOVEMBER 1988 – REVISED MAY 1997 D D D Inputs Are TTL-Voltage Compatible Buffered Inputs and Outputs Package Options Include Plastic Small-Outline (D) and Ceramic Flat (W) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs SN54HCT157 . . . J OR W PACKAGE SN74HCT157 . . . D OR N PACKAGE (TOP VIEW) A/B 1A 1B 1Y 2A 2B 2Y GND description The SN54HCT157 is characterized for operation over the full military temperature range of –55°C to 125°C. The SN74HCT157 is characterized for operation from –40°C to 85°C. FUNCTION TABLE INPUTS 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 3 14 4 13 5 12 6 11 7 10 8 9 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 DATA SELECT A/B 15 SN54HCT157 . . . FK PACKAGE (TOP VIEW) OUTPUT Y STROBE G 16 2 1A A/B NC VCC G These monolithic 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. 1 NC – No internal connection 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 1997, Texas Instruments Incorporated UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information 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 SN54HCT157, SN74HCT157 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS SCLS071B – NOVEMBER 1988 – REVISED MAY 1997 logic symbol† G A/B 1A 1B 2A 2B 3A 3B 4A 4B 15 1 EN G1 2 1 3 MUX 4 1Y 1 5 7 6 11 9 10 14 12 13 2Y 3Y 4Y † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, J, N, and W packages. 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 SN54HCT157, SN74HCT157 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS SCLS071B – NOVEMBER 1988 – REVISED MAY 1997 absolute maximum ratings over operating free-air temperature range† 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78°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, except for through-hole packages, which use a trace length of zero. recommended operating conditions SN54HCT157 VCC VIH Supply voltage VIL VI Low-level input voltage VO tt TA Operating free-air temperature High-level input voltage VCC = 4.5 V to 5.5 V VCC = 4.5 V to 5.5 V SN74HCT157 MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 2 2 UNIT V V 0 0.8 0 0.8 V Input voltage 0 0 VCC VCC V 0 VCC VCC 0 Output voltage Input transition (rise and fall) time 0 500 0 500 ns –55 125 –40 85 °C V 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 45V 4.5 VOL VI = VIH or VIL IOL = 20 µA IOL = 6 mA 45V 4.5 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 MIN TA = 25°C 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. PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 SN54HCT157, SN74HCT157 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS SCLS071B – NOVEMBER 1988 – REVISED MAY 1997 switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Figure 1) PARAMETER tpd d 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 d 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 PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYP 12 UNIT pF SN54HCT157, SN74HCT157 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS SCLS071B – NOVEMBER 1988 – REVISED MAY 1997 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 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products 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. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK. In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not 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. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, warranty or endorsement thereof. Copyright 1998, Texas Instruments Incorporated