SN54/74LS125A SN54/74LS126A QUAD 3-STATE BUFFERS VCC E D O E D O 14 13 12 11 10 9 8 QUAD 3-STATE BUFFERS LOW POWER SCHOTTKY 1 2 3 4 5 6 7 E D O E D O GND LS125A VCC E D O E D O 14 13 12 11 10 9 8 J SUFFIX CERAMIC CASE 632-08 14 1 N SUFFIX PLASTIC CASE 646-06 14 1 1 2 3 4 5 6 7 E D O E D O GND LS126A 14 1 D SUFFIX SOIC CASE 751A-02 TRUTH TABLES LS125A LS126A INPUTS ORDERING INFORMATION INPUTS E D OUTPUT E D OUTPUT L L H L H X L H (Z) H H L L H X L H (Z) SN54LSXXXJ SN74LSXXXN SN74LSXXXD Ceramic Plastic SOIC L = LOW Voltage Level H = HIGH Voltage Level X = Don't Care (Z) = High Impedance (off) GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 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 - 1.0 - 2.6 mA IOL Output Current -- Low 54 74 12 24 mA FAST AND LS TTL DATA 5-207 SN54/74LS125A * SN54/74LS126A 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 2.0 54 0.7 74 0.8 - 0.65 - 1.5 Unit 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 2.4 V 74 2.4 V VCC = MIN, IOH = MAX, VIN = VIH or VIL per Truth Table VCC = VCC MIN, VIN = VIL or VIH per Truth Table 54, 74 0.25 0.4 V IOL = 12 mA 74 0.35 0.5 V IOL = 24 mA Output Off Current HIGH 20 A VCC = MAX, VOUT = 2.4 V Output Off Current LOW - 20 A VCC = MAX, VOUT = 0.4 V 20 A VCC = MAX, VIN = 2.7 V 0.1 mA VCC = MAX, VIN = 7.0 V - 0.4 mA VCC = MAX, VIN = 0.4 V -225 mA VCC = MAX mA VCC = MAX IIH Input HIGH Current IIL Input LOW Current IOS Short Circuit Current (Note 1) ICC Power Supply Current - 40 LS125A 20 LS126A 22 VIN = 0 V, VE = 4.5 V VIN = 0 V, VE = 0 V Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. AC CHARACTERISTICS (TA = 25C) Limits Symbol tPLH tPHL Typ Max LS125A Min 9.0 15 LS126A 9.0 15 LS125A 7.0 18 LS126A 8.0 18 Parameter tPLH Propagation Delay, Data to Output tPHL Unit ns Output Enable Time to HIGH Level LS125A 12 20 tPZH LS126A 16 25 Output Enable Time to LOW Level LS125A 15 25 tPZL LS126A 21 35 Output Disable Time from HIGH Level LS125A 20 tPHZ LS126A 25 Output Disable Time from LOW Level LS125A 20 tPLZ LS126A 25 FAST AND LS TTL DATA 5-208 Test Conditions Figure 2 ns Figures 4, 5 ns Figures 3, 5 ns Figures 4, 5 ns FIgures 3, 5 VCC = 5.0 V CL = 45 pF RL = 667 VCC = 5.0 V CL = 5.0 pF RL = 667 SN54/74LS125A * SN54/74LS126A Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 SWITCH POSITIONS SYMBOL SW1 SW2 tPZH Open Closed tPZL Closed Open tPLZ Closed Closed tPHZ Closed Closed FAST AND LS TTL DATA 5-209 Case 751A-02 D Suffix 14-Pin Plastic SO-14 "! !! ( ( ! " " ! " # %# (" ! "# !# -A- 8 P -B1 ! #! " #! ! * ! !" $ !" M J F R X 45 K D " ! ! " * C G " 7 & 14 "#! ! ! ! ) ) ) ) Case 632-08 J Suffix 14-Pin Ceramic Dual In-Line -A- "! ! " ! & 14 8 " ! " " -B1 ! 7 * " -T- L G J " ! & # * !" $ !" " M N D ! " * K F $ " $ " " C $ & ! ! ! ! ! ) ) ) ) Case 646-06 N Suffix 14-Pin Plastic "! 14 " B 1 A ! ( ! " # # F L C J N K M FAST AND LS TTL DATA 5-210 ! " * !" $ !" D ! $ ! H #! " " ! ( " " 7 G ! $" '' !" " !" " %# 8 * ! ! ! ! # 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. Literature Distribution Centers: USA: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. 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. 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 5-211