M54HCT540/541 M74HCT540/541 OCTAL BUS BUFFER WITH 3 STATE OUTPUTS HCT540: INVERTED - HCT541 NON INVERTED . . . . . . . HIGH SPEED tPD = 10 ns (TYP.) at VCC = 5V LOW POWER DISSIPATION o ICC = 4 µA (MAX.) at TA = 25 C COMPATIBLE WITH TTL OUTPUTS VIH = 2V (MIN.) VIL = 0.8V (MAX.) OUTPUT DRIVE CAPABILITY 15 LSTTL LOADS SYMMETRICAL OUTPUT IMPEDANCE |IOH| = IOL = 6 mA (MIN) BALANCED PROPAGATION DELAYS tPLH = tPHL PIN AND FUNCTION COMPATIBLE WITH 54/74LS540/541 B1R (Plastic Package) F1R (Ceramic Package) M1R C1R (Micro Package) (Chip Carrier) ORDER CODES : M54HCTXXXF1R M74HCTXXXM1R M74HCTXXXB1R M74HCTXXXC1R DESCRIPTION The M54/74HCT540 and HCT541 are high speed CMOS OCTAL BUS BUFFERS (3-STATE) fabricated in silicon gate C2MOS technology. They have the same high speed performance of LSTTL combined with true CMOS low power consumption. The HCT540 is an inverting buffer and HCT541 is a non inverting buffer. The 3 STATE control gate operates as a two input AND such that if either G1 and G2 are high, all eight outputs are in the high impedance state. In order to enhance PC board layout, the HCT540 and HCT541 offers a pinout having inputs and outputs on opposite sides of the package. All inputs are equipped with protection circuits against static discharge and transient excess voltage. 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. IT IS PROHIBITED TO APPLY A SIGNAL TO BUS TERMINAL WHEN IT IS IN OUTPUT MODE. WHEN A BUS TERMINAL IS FLOATING (HIGH IMPEDANCE STATE) IT IS REQUESTED TO FIX THE INPUT LEVEL BY MEANS OF EXTERNAL PULL DOWN OR PULL UP RESISTOR. PIN CONNECTION (top view) HCT540 October 1993 HCT541 1/12 M54/M74HCT540/541 CHIP CARRIER HCT540 HCT541 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION (HCT540) PIN No SYMBOL 1, 19 G1, G2 2, 3, 4, 5, 6, 7, 8, 9 18, 17, 16, 15, 14, 13, 11, 12 10 A1 to A8 Data Inputs Y1 to Y8 Bus Outputs GND Ground (0V) 20 V CC Positive Supply Voltage 2/12 NAME AND FUNCTION Output Enable Inputs PIN DESCRIPTION (HCT541) PIN No SYMBOL 1, 19 G1, G2 2, 3, 4, 5, 6, 7, 8, 9 18, 17, 16, 15, 14, 13, 11, 12 10 A1 to A8 Data Inputs Y1 to Y8 Bus Outputs GND Ground (0V) VCC Positive Supply Voltage 20 NAME AND FUNCTION Output Enable Inputs M54/M74HCT540/541 IEC LOGIC SYMBOLS HCT540 HCT541 TRUTH TABLE INPUT G1 H X OUTPUT G2 X H An X X Yn (HCT540) Z Z Yn (HCT541) Z Z L L L L H L H L H L X: ”H” or ”L” Z: High impedance CIRCUIT SCHEMATIC (Per Circuit) HCT540 HCT541 3/12 M54/M74HCT540/541 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 TL Storage Temperature Lead Temperature (10 sec) -65 to +150 300 o o C 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 VCC Parameter Supply Voltage VI Input Voltage VO Top Output Voltage Operating Temperature: M54HC Series M74HC Series Input Rise and Fall Time (VCC = 4.5 to 5.5V) tr, tf 4/12 Value 4.5 to 5.5 Unit V 0 to VCC V 0 to VCC -55 to +125 -40 to +85 0 to 500 V C o C ns o M54/M74HCT540/541 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 IOZ ICC ∆ICC Low Level Output Voltage Input Leakage Current 3 State Output Off State Current Quiescent Supply 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 VI = VIH or VIL VO = VCC or GND 5.5 VI = VCC or GND ±0.5 ±5 ±10 µA 4 40 80 µA 5.5 2.0 2.9 3.0 mA 5.5 5.5 Per Input pin VI = 0.5V or V I = 2.4V Other Inputs at V CC or GND V 5/12 M54/M74HCT540/541 AC ELECTRICAL CHARACTERISTICS (C L = 50 pF, Input t r = tf = 6 ns) Test Conditions TA = 25 oC 54HC and 74HC Symbol Parameter VCC (V) CL (pF) tTLH tTHL tPLH tPHL Output Transition Time Propagation Delay Time (for HCT540) 4.5 50 Typ. 6 Max. 12 4.5 50 12 20 4.5 150 16 25 tPLH tPHL Propagation Delay Time (for HCT541) 4.5 4.5 50 150 14 18 tPZL tPZH Output Enable Time 4.5 4.5 4.5 50 150 50 tPLZ tPHZ CIN CPD (*) Output Disable Time Input Capacitance Power Dissipation Capacitance Min. RL = 1KΩ RL = 1KΩ RL = 1KΩ Value -40 to 85 oC -55 to 125 oC 74HC 54HC Min. Max. 15 Min. Unit Max. 18 ns 25 30 ns 31 38 ns 23 28 29 35 35 42 ns ns 18 22 19 30 34 27 38 43 34 45 51 41 ns ns ns 5 34 10 10 10 pF 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/8 (per gate) TEST CIRCUIT ICC (Opr.) HCT540 6/12 M54/M74HCT540/541 SWITCHING CHARACTERISTICS TEST CIRCUIT HCT540 HCT541 7/12 M54/M74HCT540/541 Plastic DIP20 (0.25) MECHANICAL DATA mm DIM. MIN. a1 0.254 B 1.39 TYP. inch MAX. MIN. TYP. MAX. 0.010 1.65 0.055 0.065 b 0.45 0.018 b1 0.25 0.010 D 25.4 1.000 E 8.5 0.335 e 2.54 0.100 e3 22.86 0.900 F 7.1 0.280 I 3.93 0.155 L Z 3.3 0.130 1.34 0.053 P001J 8/12 M54/M74HCT540/541 Ceramic DIP20 MECHANICAL DATA mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 25 0.984 B 7.8 0.307 D E 3.3 0.5 e3 0.130 1.78 0.020 22.86 0.070 0.900 F 2.29 2.79 0.090 0.110 G 0.4 0.55 0.016 0.022 I 1.27 1.52 0.050 0.060 L 0.22 0.31 0.009 0.012 M 0.51 1.27 0.020 0.050 N1 P Q 4° (min.), 15° (max.) 7.9 8.13 5.71 0.311 0.320 0.225 P057H 9/12 M54/M74HCT540/541 SO20 MECHANICAL DATA mm DIM. MIN. TYP. A a1 inch MAX. MIN. TYP. 2.65 0.10 0.104 0.20 a2 MAX. 0.004 0.007 2.45 0.096 b 0.35 0.49 0.013 0.019 b1 0.23 0.32 0.009 0.012 C 0.50 0.020 c1 45° (typ.) D 12.60 13.00 0.496 0.512 E 10.00 10.65 0.393 0.419 e 1.27 0.050 e3 11.43 0.450 F 7.40 7.60 0.291 0.299 L 0.50 1.27 0.19 0.050 M S 0.75 0.029 8° (max.) P013L 10/12 M54/M74HCT540/541 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 11/12 M54/M74HCT540/541 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 12/12