SN54/74LS795 SN54/74LS796 SN54/74LS797 SN54/74LS798 TRI-STATE OCTAL BUFFERS The SN54 / 74LS795 thru SN54 / 74LS798 device types provide a second source for the 71 / 81LS95 thru 71 / 81LS98 series. These devices are octal low power Schottky versions of the 70/8095 thru 70/8098 3-STATE Hex Buffers. The LS795 and LS797 are noninverting and the LS796 and LS798 are inverting functions. On each buffer, one of the two inputs is used as a control line to gate the output into the high impedance state, while the other input passes the data through the buffer. On the LS795 and LS796 access is through a 2-input NOR gate, with all eight 3-STATE enable lines common. On the LS797 and LS798, four buffers are enabled from one common line and the other four buffers from another common line. On all device types the 3-STATE condition is achieved by applying a high logic level to the enable pins. TRI-STATE OCTAL BUFFERS LOW POWER SCHOTTKY TRUTH TABLES LS795 INPUTS J SUFFIX CERAMIC CASE 732-03 LS796 OUTPUT INPUTS 20 OUTPUT G1 G2 A Y G1 G2 A Y H X L L X H L L X X H L Z Z H L H X L L X H L L X X H L Z Z L H 1 N SUFFIX PLASTIC CASE 738-03 20 1 LS797 INPUTS LS798 OUTPUT INPUTS OUTPUT G A Y G A Y H L L X H L Z H L H L L X H L Z L H DW SUFFIX SOIC CASE 751D-03 20 1 ORDERING INFORMATION SN54LSXXXJ Ceramic SN74LSXXXN Plastic SN74LSXXXDW SOIC GUARANTEED OPERATING RANGES Min Typ Max Unit VCC Symbol Supply Voltage Parameter 54 74 4.5 4.75 5.0 5.0 5.5 5.25 V TA Operating Ambient Temperature Range 54 74 – 55 0 25 25 125 70 °C IOH Output Current — High 54 74 – 2.6 – 5.0 mA IOL Output Current — Low 54 74 8.0 16 mA FAST AND LS TTL DATA 5-609 SN54/74LS795 • SN54/74LS796 SN54/74LS797 • SN54/74LS798 LOGIC DIAGRAMS VCC G2 A8 Y8 A7 Y7 A6 Y6 A5 Y5 20 19 18 17 16 15 14 13 12 11 VCC G2 A8 Y8 A7 Y7 A6 Y6 A5 Y5 20 19 18 17 16 15 14 13 12 11 1 2 3 G1 A1 Y1 1 2 3 G1 A1 Y1 4 A2 5 6 7 8 9 10 Y2 A3 Y3 A4 Y4 GND 4 A2 5 6 7 8 9 10 Y2 A3 Y3 A4 Y4 GND SN54/74LS796 SN54/74LS795 VCC G2 A8 Y8 A7 Y7 A6 Y6 A5 Y5 20 19 18 17 16 15 14 13 12 11 VCC G2 A8 Y8 A7 Y7 A6 Y6 A5 Y5 20 19 18 17 16 15 14 13 12 11 1 2 3 G1 A1 Y1 1 2 3 G1 A1 Y1 4 A2 5 6 7 8 9 10 Y2 A3 Y3 A4 Y4 GND SN54/74LS797 4 A2 5 6 7 8 9 10 Y2 A3 Y3 A4 Y4 GND SN54/74LS798 FAST AND LS TTL DATA 5-610 SN54/74LS795 THRU SN54/74LS798 DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol Min Parameter VIH Input HIGH Voltage VIL Input LOW Voltage VIK Input Clamp Diode Voltage VOH Output HIGH Voltage VOL Output LOW Voltage IOZH IOZL Typ Max Unit 2.0 54 0.7 74 0.8 – 0.65 – 1.5 Test Conditions V Guaranteed Input HIGH Voltage for All Inputs V Guaranteed Input LOW Voltage for All Inputs V VCC = MIN, IIN = – 18 mA 54 2.5 3.5 V 74 2.7 3.5 V VCC = MIN, IOH = MAX VCC = VCC MIN, VIN = VIL or VIH per Truth Table 54, 74 0.25 0.4 V IOL = 8.0 mA 74 0.35 0.5 V IOL = 16 mA Output Off Current — HIGH 20 µA VCC = MAX, VOUT = 2.7 V Output Off Current — LOW – 20 µA VCC = MAX, VOUT = 0.4 V 20 µA VCC = MAX, VIN = 2.7 V – 0.1 mA VCC = MAX, VIN = 7.0 V IIH Input HIGH Current IIL Input LOW Current A Input, Both G at 0.4 V G Input – 0.4 – 0.4 mA VCC = MAX, VIN = 0.4 V A Input, Both G at 2.0 V – 20 µA VCC = MAX, VIN = 0.5 V –130 mA VCC = MAX LS795/LS797 26 mA LS795/LS798 21 mA IOS Short Circuit Current (Note 1) ICC Power Supply Current – 30 VCC = MAX Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. AC CHARACTERISTICS (TA = 25°C) Limits LS795 / LS797 Symbol Parameter LS796 / LS798 Typ Max Unit 16 22 6.0 13 10 17 ns Output Enable Time 16 13 25 20 17 16 27 25 ns Output Disable Time 13 19 20 27 13 18 20 27 ns Typ Max Propagation Delay 11 15 tPZH tPZL tPHZ tPLZ tPLH tPHL Min Min FAST AND LS TTL DATA 5-611 Test Conditions VCC = 5.0 V CL = 15 pF CL = 5.0 pF Case 751D-03 DW Suffix 20-Pin Plastic SO-20 (WIDE) "! ! " -A11 1 10 ! " # P C -T- " #! D J F K ! #! * * !" $ !" M * R X 45° " " %# G ! " ! -B- ! " 20 & ! ! ° ° ° ° ) ) ) ! Case 732-03 J Suffix 20-Pin Ceramic Dual In-Line "! ! $" '' " # !" " !" " %# 20 " 11 1 10 B L C F N H G D J M K Case 738-03 N Suffix 20-Pin Plastic ! ! ° ° ° ° ! " " ! ( " " B ! ! $ ! ( ! " # ! C -T- L K G ! & 11 E ! 10 1 #! !#! "! -A20 ! $ A " " " N M F J D " " FAST AND LS TTL DATA 5-612 * !" $ !" * ! ! ! ! ! ° ° ! ° ° Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different applications. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. SYMBOL SW1 SW2 tPLZ Closed Closed tPHZ Closed Closed Literature Distribution Centers: USA: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. tPZH Open Closed EUROPE: Motorola Ltd.; European Literature Centre; 88 Tanners Drive, Blakelands, Milton Keynes, MK14 5BP, England. JAPAN: Nippon Motorola Ltd.; 4-32-1, Nishi-Gotanda, Shinagawa-ku, Tokyo 141, Japan. tPZL Closed Open ASIA PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Center, No. 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. ◊ FAST AND LS TTL DATA 5-613