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| 74ACT125 QUAD BUS BUFFERS (3-STATE) PRELIMINARY DATA s s s s s s s s s HIGH SPEED: tPD = 6.5 ns (TYP.) at VCC = 5V LOW POWER DISSIPATION: ICC = 8 A (MAX.) at TA = 25 oC COMPATIBLE WITH TTL OUTPUTS VIH = 2V (MIN), VIL = 0.8V (MAX) 50 TRANSMISSION LINE DRIVING CAPABILITY SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24 mA (MIN) BALANCED PROPAGATION DELAYS: tPLH tPHL OPERATING VOLTAGE RANGE: VCC (OPR) = 4.5V to 5.5V PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 125 IMPROVED LATCH-UP IMMUNITY B M (Plastic Package) (Micro Package) ORDER CODES : 74ACT125B 74ACT125M equivalent Bipolar Schottky TTL. These devices require the same 3-STATE control input G to be taken high to make the output go in to the high impedance state. The device is designed to interface directly High Speed CMOS systems with TTL, NMOS and CMOS output voltage levels. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. DESCRIPTION The ACT125 is an high-speed CMOS QUAD BUS BUFFERS fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It is ideal for low power applications maintaining high speed operation similar to PIN CONNECTION AND IEC LOGIC SYMBOLS May 1997 1/8 74ACT125 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No 1, 4, 10, 13 2, 5, 9, 12 3, 6, 8, 11 7 14 SYMBOL G1 to G4 A1 to A4 Y1 to Y4 GND VCC NAME AND F UNCTIO N Output Enable Inputs Data Inputs Data Outputs Ground (0V) Positive Supply Voltage TRUTH TABLE A X L H G H L L Y Z L H ABSOLUTE MAXIMUM RATINGS Symbol VCC VI VO IIK IOK IO Tstg TL Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Current Storage Temperature Lead Temperature (10 sec) Parameter Value -0.5 to +7 -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 20 20 50 200 -65 to +150 300 Unit V V V mA mA mA mA o o ICC or IGND DC VCC or Ground Current C C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. RECOMMENDED OPERATING CONDITIONS Symbol VCC VI VO Top dt/dv Supply Voltage Input Voltage Output Voltage Operating Temperature: Input Rise and Fall Time VCC = 4.5 to 5.5V (note 1) Parameter Valu e 4.5 to 5.5 0 to VCC 0 to VCC -40 to +85 8 Unit V V V o C ns/V 1) VIN from 0.8 V to 2.0 V 2/8 74ACT125 DC SPECIFICATIONS Symbol Parameter V CC (V) VIH VIL VOH High Level Input Voltage Low Level Input Voltage High Level Output Voltage 4.5 5.5 4.5 5.5 4.5 5.5 4.5 5.5 VOL Low Level Output Voltage 4.5 5.5 4.5 5.5 II IOZ ICCT ICC IOLD IOHD Input Leakage Current 3 State Output Leakage Current Max ICC /Input Quiescent Supply Current Dynamic Output Current (note 1, 2) 5.5 5.5 5.5 5.5 5.5 V I (*) = V IH or V IL VO = 0.1 V or VCC - 0.1 V VO = 0.1 V or VCC - 0.1 V VI = V IH or V IL (*) Test Con dition s Min. 2.0 2.0 Typ. 1.5 1.5 1.5 1.5 4.4 5.4 3.86 4.86 0.001 0.001 4.49 5.49 Value T A = 25 oC Max. -40 to 85 o C Min . 2.0 2.0 0.8 0.8 4.4 5.4 3.76 4.76 0.1 0.1 0.36 0.36 0.1 0.5 0.6 8 0.1 0.1 0.44 0.44 1 5 1.5 80 75 -75 0.8 0.8 Max. Unit V V V IO=-50 A IO=-50 A IO=-24 mA IO=-24 mA IO=50 A IO=50 mA IO=24 mA IO=24 mA V VI = VCC or GND VI = VIH or VIL VO = VCC or GND VI = VCC -2.1 V VI = VCC or GND VOLD = 1.65 V max VOHD = 3.85 V min A A mA A mA mA 1) Maximum test duration 2ms, one output loaded at time 2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50 . (*) All outputs loaded. 3/8 74ACT125 AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 , Input tr = t f =3 ns) Symbol Parameter V CC (V) tPLH tPHL tPZL tPZH tPLZ tPHZ Propagation Delay Time Output Enable Time Output Disable Time 5.0 5.0 (*) T est Cond ition Value T A = 25 oC -40 to 85 o C Min. Typ. Max. Min . Max. 1.0 1.0 1.0 6.5 6.0 7.0 9.0 8.5 9.5 1.0 1.0 1.0 10.0 9.5 10.5 Unit ns ns ns (*) 5.0 (*) (*) Voltage range is 5V 0.5V CAPACITIVE CHARACTERISTICS Symbol Parameter V CC (V) CIN C OUT C PD Input Capacitance Output Capacitance Power Dissipation Capacitance (note 1) 5.0 5.0 5.0 Test Con dition s o Value T A = 25 C Min. Typ. 4 8 TBD Max. -40 to 85 C Min . Max. o Unit pF pF pF 1) 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 operating current can be obtained by the following equation. ICC(opr) = CPD * VCC * fIN + ICC/n (per circuit) TEST CIRCUIT TEST t PLH, tPHL t PZL, tPLZ t PZH, tPHZ CL = 50 pF or equivalent (includes jig and probe capacitance) RL = R1 = 500 or equivalent RT =ZOUT of pulse generator (typically 50) SWITCH Open 2VCC Open 4/8 74ACT125 WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle) WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle) 5/8 74ACT125 Plastic DIP-14 MECHANICAL DATA mm MIN. a1 B b b1 D E e e3 F I L Z 1.27 3.3 2.54 0.050 8.5 2.54 15.24 7.1 5.1 0.130 0.100 0.51 1.39 0.5 0.25 20 0.335 0.100 0.600 0.280 0.201 1.65 TYP. MAX. MIN. 0.020 0.055 0.020 0.010 0.787 0.065 inch TYP. MAX. DIM. P001A 6/8 74ACT125 SO-14 MECHANICAL DATA DIM. MIN. A a1 a2 b b1 C c1 D E e e3 F G L M S 3.8 4.6 0.5 8.55 5.8 1.27 7.62 4.0 5.3 1.27 0.68 8 (max.) 0.149 0.181 0.019 8.75 6.2 0.35 0.19 0.5 45 (typ.) 0.336 0.228 0.050 0.300 0.157 0.208 0.050 0.026 0.344 0.244 0.1 mm TYP. MAX. 1.75 0.2 1.65 0.46 0.25 0.013 0.007 0.019 0.003 MIN. inch TYP. MAX. 0.068 0.007 0.064 0.018 0.010 P013G 7/8 74ACT125 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 supersede and replaces all information previously supplied. s SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectonics. (c) 1997 SGS-THOMSON Microelectronics - Printed in Italy - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A . 8/8 |
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