M54/74HCT125 M54/74HCT126 QUAD BUS BUFFERS (3-STATE) . . . . . . . HIGH SPEED tPD = 12 ns (TYP.) AT VCC = 5 V LOW POWER DISSIPATION ICC = 4 µA (MAX.) AT 25 °C OUTPUT DRIVE CAPABILITY 15 LSTTL LOADS BALANCED PROPAGATION DELAYS tPLH = tPHL SYMMETRICAL OUTPUT IMPEDANCE IOL = IOH = 6 mA (MIN.) COMPATIBLE WITH TTL OUTPUTS VIH = 2V (MIN.) VIL = 0.8V (MAX) PIN AND FUNCTION COMPATIBLE WITH 54/74LS125/126 DESCRIPTION The M54/74HCT125/126 are high speed CMOS QUAD BUS BUFFER (3-STATE) FABRICATED IN SILICON GATE C2MOS technology. They have the same high speed performance of LSTTL combined with true CMOS low power consumption. These devices require the same 3-STATE control input G to be taken high to make the output go into the high impedance state.This integrated circuit has input and output characteristics that are fully compatible with 54/74 LSTTL logic families. M54/74HCT devices are designed to directly interface HSC2MOS systems with TTL and NMOS components. They are also plug in replacements for LSTTL devices giving a reduction of power consumption. All inputs are equipped with protection circuits against static discharge and transient excess voltage. INPUT AND OUTPUT EQUIVALENT CIRCUIT B1R (Plastic Package) F1R (Ceramic Package) M1R (Micro Package) C1R (Chip Carrier) ORDER CODES : M54HCTXXXF1R M74HCTXXXM1R M74HCTXXXB1R M74HCTXXXC1R PIN CONNECTIONS (top view) HCT125 HCT126 NC = No Internal Connection October 1993 1/10 M54/M74HCT125/126 CHIP CARRIER HCT125 HCT126 TRUTH TABLE (HCT125) TRUTH TABLE (HCT126) A G Y A G Y X L H L Z L X L L H Z L H L H H H H PIN DESCRIPTION (HCT125) PIN DESCRIPTION (HCT126) PIN No 1, 4, 10, 13 SYMBOL G1 to G4 NAME AND FUNCTION Output Enable Input PIN No 1, 4, 10, 13 SYMBOL G1 to G4 NAME AND FUNCTION Output Enable Input 2, 5, 9, 12 A1 to A4 Data Inputs 2, 5, 9, 12 A1 to A4 Data Inputs 3, 6, 8, 11 7 Y1 to Y4 GND Data Outputs Ground (0V) 3, 6, 8, 11 7 Y1 to Y4 GND Data Outputs Ground (0V) 14 VCC 14 VCC Positive Supply Voltage IEC LOGIC SYMBOLS HCT125 2/10 HCT126 Positive Supply Voltage M54/M74HCT125/126 CIRCUIT DIAGRAM HCT125 HCT126 ABSOLUTE MAXIMUM RATINGS Symbol Value Unit VCC VI Supply Voltage DC Input Voltage -0.5 to +7 -0.5 to VCC + 0.5 V V VO DC Output Voltage -0.5 to VCC + 0.5 V IIK IOK DC Input Diode Current DC Output Diode Current ± 20 ± 20 mA mA IO DC Output Source Sink Current Per Output Pin ± 35 mA DC VCC or Ground Current ± 70 mA 500 (*) mW ICC or IGND Parameter PD Power Dissipation Tstg Storage Temperature TL Lead Temperature (10 sec) -65 to +150 o C 300 o C Absolute Maximum Ratings are those values beyond which damage tothe device may occur. Functional operation under these conditions is not implied. (*) 500 mW: ≅ 65 oC derate to 300 mW by 10mW/oC: 65 oC to 85 oC RECOMMENDED OPERATING CONDITIONS Symbol Parameter Value Unit V V VCC VI Supply Voltage Input Voltage 4.5 to 5.5 0 to VCC VO Output Voltage 0 to VCC Top tr, tf Operating Temperature: M54HC Series M74HC Series Input Rise and Fall Time (VCC = 4.5 to 5.5V) -55 to +125 -40 to +85 0 to 500 V o C C ns o 3/10 M54/M74HCT125/126 DC SPECIFICATIONS Test Conditions Symbol Parameter VCC (V) VIH High Level Input Voltage 4.5 to 5.5 V IL Low Level Input Voltage 4.5 to 5.5 V OH High Level Output Voltage VOL II ICC IOZ ∆ICC Low Level Output Voltage Input Leakage Current Quiescent Supply Current 3 State Output Off State Current Additional worst case supply current Value TA = 25 oC 54HC and 74HC Min. Typ. Max. 2.0 -40 to 85 oC -55 to 125 oC 74HC 54HC Min. Max. Min. Max. 2.0 0.8 4.5 VI = IO=-20 µA VIH or IO=-6.0 mA V IL 4.5 VI = IO= 20 µA VIH or IO= 6.0 mA V IL 2.0 0.8 V 0.8 4.4 4.5 4.4 4.4 4.18 4.31 4.13 4.10 Unit V V 0.0 0.1 0.1 0.1 0.17 0.26 0.33 0.4 VI = VCC or GND ±0.1 ±1 ±1 µA 5.5 VI = VCC or GND 4 40 80 µA 6.0 VI = VIH or VIL VO = VCC or GND ±0.5 ±5 ±10 µA Per Input pin VI = 0.5V or V I = 2.4V Other Inputs at V CC or GND IO= 0 2.0 2.9 3.0 mA 5.5 5.5 V AC ELECTRICAL CHARACTERISTICS (Input t r = t f = 6 ns) Test Conditions Value -40 to 85 oC -55 to 125 oC 74HC 54HC Min. Max. Min. Max. 15 18 Symbol Parameter VCC (V) CL (pF) tTLH tTHL tPLH tPHL Output Transition Time Propagation Delay Time 4.5 50 TA = 25 oC 54HC and 74HC Min. Typ. Max. 7 12 tPZL tPZH 3 State Output Enable Time 4.5 4.5 4.5 4.5 4.5 50 150 50 150 50 13 17 15 19 17 21 27 24 30 24 26 34 30 38 30 32 41 36 45 36 ns ns ns ns ns 5 56 10 10 10 pF tPLZ tPHZ CIN CPD (*) 3 State Output Disable Time Input Capacitance Power Dissipation Capacitance RL = 1 KΩ RL = 1 KΩ RL = 1 KΩ Unit ns pF (*) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operting current can be obtained by the following equation. ICC(opr) = CPD •VCC •fIN + ICC 4/10 M54/M74HCT125/126 TEST CIRCUIT ICC (Opr.) HCT125 HCT126 THE OTHER INPUTS ARE CONNECTED TO VCC LINE OR GND LINE SWITCHING CHARACTERISTICS TEST WAVEFORM HCT125 HCT126 5/10 M54/M74HCT125/126 Plastic DIP14 MECHANICAL DATA mm DIM. MIN. a1 0.51 B 1.39 TYP. inch MAX. MIN. TYP. MAX. 0.020 1.65 0.055 0.065 b 0.5 0.020 b1 0.25 0.010 D 20 0.787 E 8.5 0.335 e 2.54 0.100 e3 15.24 0.600 F 7.1 0.280 I 5.1 0.201 L Z 3.3 1.27 0.130 2.54 0.050 0.100 P001A 6/10 M54/M74HCT125/126 Ceramic DIP14/1 MECHANICAL DATA mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 20 0.787 B 7.0 0.276 D E 3.3 0.130 0.38 e3 0.015 15.24 0.600 F 2.29 2.79 0.090 0.110 G 0.4 0.55 0.016 0.022 H 1.17 1.52 0.046 0.060 L 0.22 0.31 0.009 0.012 M 1.52 2.54 0.060 0.100 N P Q 10.3 7.8 8.05 5.08 0.406 0.307 0.317 0.200 P053C 7/10 M54/M74HCT125/126 SO14 MECHANICAL DATA mm DIM. MIN. TYP. A a1 inch MAX. MIN. TYP. 1.75 0.1 0.068 0.2 a2 MAX. 0.003 0.007 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.5 0.019 c1 45° (typ.) D 8.55 E 5.8 8.75 0.336 6.2 0.228 0.344 0.244 e 1.27 0.050 e3 7.62 0.300 F 3.8 4.0 0.149 0.157 G 4.6 5.3 0.181 0.208 L 0.5 1.27 0.019 0.050 M S 0.68 0.026 8° (max.) P013G 8/10 M54/M74HCT125/126 PLCC20 MECHANICAL DATA mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 9.78 10.03 0.385 0.395 B 8.89 9.04 0.350 0.356 D 4.2 4.57 0.165 0.180 d1 2.54 0.100 d2 0.56 0.022 E 7.37 8.38 0.290 0.330 e 1.27 0.050 e3 5.08 0.200 F 0.38 0.015 G 0.101 0.004 M 1.27 0.050 M1 1.14 0.045 P027A 9/10 M54/M74HCT125/126 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express written approval of SGS-THOMSON Microelectonics. 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A 10/10