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| 74V2T125 DUAL BUS BUFFER (3-STATE) s s s s s s s s HIGH SPEED: tPD = 3.8ns (TYP.) at VCC = 5V LOW POWER DISSIPATION: ICC = 1A(MAX.) at TA = 25C COMPATIBLE WITH TTL OUTPUTS: VIH = 2V (MIN), VIL = 0.8V (MAX) POWER DOWN PROTECTION ON INPUTS AND OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 8mA (MIN) BALANCED PROPAGATION DELAYS: tPLH tPHL OPERATING VOLTAGE RANGE: VCC(OPR) = 4.5V to 5.5V IMPROVED LATCH-UP IMMUNITY SOT23-8L ORDER CODES PACKAGE SOT23-8L T&R 74V2T125STR DESCRIPTION The 74V2T125 is an advanced high-speed CMOS DUAL BUS BUFFER fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. 3-STATE control input nG has to be set HIGH to place the output into the high impedance state. Power down protection is provided on all inputs and outputs and 0 to 7V can be accepted on inputs with no regard to the supply voltage. This device can be used to interface 3V to 5V systems and it is ideal for portable applications like personal digital assistant, camcorder and all battery-powered equipment. All inputs and outputs are equipped with protection circuits against static discharge, giving them ESD immunity and transient excess voltage. PIN CONNECTION AND IEC LOGIC SYMBOLS June 2003 1/8 74V2T125 INPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN N 1, 7 2, 5 3, 6 4 8 SYMBOL 1G, 2G 1A, 2A 2Y, 1Y GND VCC NAME AND FUNCTION Output Enable Inputs Data Inputs Data Outputs Ground (0V) Positive Supply Voltage TRUTH TABLE A X L H X: "H" or "L" Z: High Impedance 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 -0.5 to +7.0 -0.5 to VCC + 0.5 - 20 - 20 25 50 -65 to +150 260 Unit V V V mA mA mA mA C C ICC or IGND DC VCC or Ground Current Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions 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 (note 1) (VCC = 5.0 0.5V) Parameter Value 4.5 to 5.5 0 to 5.5 0 to VCC -55 to 125 0 to 20 Unit V V V C ns/V 1) VIN from 0.8V to 2V 2/8 74V2T125 DC SPECIFICATION Test Condition Symbol Parameter VCC (V) 4.5 to 5.5 4.5 to 5.5 4.5 4.5 4.5 4.5 5.5 0 to 5.5 0 5.5 5.5 IO=-50 A IO=-8 mA IO=50 A IO=8 mA VI = VIH or VIL VO = 5.5 or GND VI = 5.5V or GND VO = 5.5 VI = VCC or GND One Input at 3.4V, other input at VCC or GND TA = 25C Min. 0.8 2.0 4.4 3.94 0.0 0.1 0.36 0.25 0.1 0.5 1 1.35 4.5 4.4 3.8 0.1 0.44 2.5 1 5 10 1.5 Typ. Max. Value -40 to 85C Min. 0.8 2.0 4.4 3.7 0.1 0.55 5 1 10 20 1.5 Max. -55 to 125C Min. 0.8 2.0 Max. V V V V A A A A mA Unit VIH VIL VOH VOL IOZ High Level Input Voltage Low Level Input Voltage High Level Output Voltage Low Level Output Voltage High Impedance Output Leakage Current Input Leakage Current Power down Output Leakage Current Quiescent Supply Current Additional Worst Case Supply Current II IOPD ICC ICC AC ELECTRICAL CHARACTERISTICS (Input tr = tf = 3ns) Test Condition Symbol Parameter VCC (V) 5.0(*) 5.0(*) 5.0(*) 5.0(*) 5.0(*) 5.0(*) CL (pF) 15 50 15 50 15 50 RL = 1 K RL = 1 K RL = 1 K RL = 1 K TA = 25C Min. Typ. 3.8 4.3 3.6 5.1 3.7 4.1 Max. 5.5 6.5 5.0 7.0 5.9 6.5 Value -40 to 85C Min. 1.0 1.0 1.0 1.0 1.0 1.0 Max. 6.5 7.5 6.0 8.0 7.0 7.5 -55 to 125C Min. 1.0 1.0 1.0 1.0 1.0 1.0 Max. 7.5 8.5 7.0 9.0 8.0 8.5 ns Unit (*) Voltage range is 5.0V 0.5V + tPLH tPHL tPLZ tPHZ tPZL tPZH Propagation Delay Time Output Disable Time Output Enable Time 3/8 74V2T125 CAPACITIVE CHARACTERISTICS Test Condition Symbol Parameter Min. CIN COUT CPD Input Capacitance Output Capacitance Power Dissipation Capacitance (note 1) TA = 25C Typ. 4 6 14 Max. 10 Value -40 to 85C Min. Max. 10 -55 to 125C Min. Max. 10 pF pF pF Unit 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 current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/2 TEST CIRCUIT TEST CIRCUIT TEST tPLH, tPHL tPZL, tPLZ tPZH, tPHZ CL =15/50pF or equivalent (includes jig and probe capacitance) R1 = 1K or equivalent RT = ZOUT of pulse generator (typically 50) SWITCH Open VCC GND 4/8 74V2T125 WAVEFORM 1 : PROPAGATION DELAYS (f=1MHz; 50% duty cycle) WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle) 5/8 74V2T125 SOT23-8L MECHANICAL DATA mm. DIM. MIN. A A1 A2 b C D E E1 e e1 L 0.35 0.90 0.00 0.90 0.22 0.09 2.80 2.60 1.50 0 .65 1.95 0.55 13.7 TYP MAX. 1.45 0.15 1.30 0.38 0.20 3.00 3.00 1.75 MIN. 35.4 0.0 35.4 8.6 3.5 110.2 102.3 59.0 25.6 76.7 21.6 TYP. MAX. 57.1 5.9 51.2 14.9 7.8 118.1 118.1 68.8 mils 6/8 74V2T125 Tape & Reel SOT23-xL MECHANICAL DATA mm. DIM. MIN. A C D N T Ao Bo Ko Po P 3.13 3.07 1.27 3.9 3.9 3.23 3.17 1.37 4.0 4.0 12.8 20.2 60 14.4 3.33 3.27 1.47 4.1 4.1 0.123 0.120 0.050 0.153 0.153 0.127 0.124 0.054 0.157 0.157 13.0 TYP MAX. 180 13.2 0.504 0.795 2.362 0.567 0.131 0.128 0.0.58 0.161 0.161 0.512 MIN. TYP. MAX. 7.086 0.519 inch 7/8 74V2T125 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. (c) The ST logo is a registered trademark of STMicroelectronics (c) 2003 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. (c) http://www.st.com 8/8 |
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