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| 74VHC126 QUAD BUS BUFFERS (3-STATE) s s s s s s s s s s HIGH SPEED: tPD = 3.8ns (TYP.) at VCC = 5V LOW POWER DISSIPATION: ICC = 4 A (MAX.) at TA=25C HIGH NOISE IMMUNITY: VNIH = VNIL = 28% VCC (MIN.) POWER DOWN PROTECTION ON INPUTS SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 8 mA (MIN) BALANCED PROPAGATION DELAYS: tPLH tPHL OPERATING VOLTAGE RANGE: VCC(OPR) = 2V to 5.5V PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 126 IMPROVED LATCH-UP IMMUNITY LOW NOISE: VOLP = 0.8V (MAX.) SOP TSSOP Table 1: Order Codes PACKAGE SOP TSSOP T&R 74VHC126MTR 74VHC126TTR DESCRIPTION The 74VHC126 is an advanced high-speed CMOS QUAD BUS BUFFERs fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. The device requires the 3-STATE control input G to be set low to place the output go in to the high impedance state. Power down protection is provided on all inputs and 0 to 7V can be accepted on inputs with no regard to the supply voltage. This device can be used to interface 5V to 3V. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. Figure 1: Pin Connection And IEC Logic Symbols November 2004 Rev. 5 1/12 74VHC126 Figure 2: Input Equivalent Circuit Table 2: Pin Description PIN N 1, 4, 10, 13 2, 5, 9, 12 3, 6, 8, 11 7 14 SYMBOL 1G to 4G 1A to 4A 1Y to 4Y GND VCC NAME AND FUNCTION Output Enable Inputs Data Inputs Data Outputs Ground (0V) Positive Supply Voltage Table 3: Truth Table A X L H X :Don`t Care Z : High Impedance G L H H Y Z L H Table 4: 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 +150 300 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 Table 5: 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 = 3.3 0.3V) (VCC = 5.0 0.5V) Parameter Value 2 to 5.5 0 to 5.5 0 to VCC -55 to 125 0 to 100 0 to 20 Unit V V V C ns/V 1) VIN from 30% to 70% of VCC 2/12 74VHC126 Table 6: DC Specifications Test Condition Symbol Parameter VCC (V) 2.0 3.0 to 5.5 2.0 3.0 to 5.5 2.0 3.0 4.5 3.0 4.5 VOL Low Level Output Voltage 2.0 3.0 4.5 3.0 4.5 IOZ High Impedance Output Leakage Current Input Leakage Current Quiescent Supply Current 5.5 0 to 5.5 5.5 IO=-50 A IO=-50 A IO=-50 A IO=-4 mA IO=-8 mA IO=50 A IO=50 A IO=50 A IO=4 mA IO=8 mA VI = VIH or VIL VO = VCC or GND VI = 5.5V or GND VI = VCC or GND TA = 25C Min. 1.5 0.7VCC 0.5 0.3VCC 1.9 2.9 4.4 2.58 3.94 0.0 0.0 0.0 0.1 0.1 0.1 0.36 0.36 0.25 0.1 4 2.0 3.0 4.5 1.9 2.9 4.4 2.48 3.8 0.1 0.1 0.1 0.44 0.44 2.5 1 40 Typ. Max. Value -40 to 85C Min. 1.5 0.7VCC 0.5 0.3VCC 1.9 2.9 4.4 2.4 3.7 0.1 0.1 0.1 0.55 0.55 2.5 1 40 A A A V V Max. -55 to 125C Min. 1.5 0.7VCC 0.5 0.3VCC V V Max. Unit VIH High Level Input Voltage Low Level Input Voltage High Level Output Voltage VIL VOH II ICC Table 7: AC Electrical Characteristics (Input tr = tf = 3ns) Test Condition Symbol Parameter VCC (V) 3.3(*) 3.3(*) 5.0 tPLZ tPHZ Output Disable Time (**) Value TA = 25C Min. Typ. 5.6 8.1 3.8 5.3 Max. 8.0 11.5 5.5 7.5 8.0 11.5 5.1 7.1 13.2 8.8 -40 to 85C Min. 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Max. 9.5 13.0 6.5 8.5 9.5 13.0 6.0 8.0 15.0 10.0 -55 to 125C Min. 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Max. 9.5 13.0 6.5 8.5 9.5 13.0 6.0 8.0 15.0 10.0 ns ns ns Unit CL (pF) 15 50 15 50 15 50 15 50 50 50 RL = 1 K RL = 1 K RL = 1 K RL = 1 K RL = 1 K RL = 1 K tPLH tPHL Propagation Delay Time 5.0(**) 3.3 (*) 5.4 7.9 3.6 5.1 9.5 6.1 3.3(*) 5.0(**) 5.0(**) (*) tPZL tPZH Output Enable Time 3.3 5.0(**) (*) Voltage range is 3.3V 0.3V (**) Voltage range is 5.0V 0.5V 3/12 74VHC126 Table 8: Capacitive Characteristics Test Condition Symbol Parameter TA = 25C Min. CIN COUT CPD Input Capacitance Output Capacitance Power Dissipation Capacitance (note 1) Typ. 6 8 17 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 operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/4 (per circuit) Table 9: Dynamic Switching Characteristics Test Condition Symbol Parameter VCC (V) 5.0 TA = 25C Min. Typ. 0.3 -0.8 CL = 50 pF 3.5 -0.3 Max. 0.8 V Value -40 to 85C Min. Max. -55 to 125C Min. Max. Unit VOLP VOLV VIHD VILD Dynamic Low Voltage Quiet Output (note 1, 2) Dynamic High Voltage Input (note 1, 3) Dynamic Low Voltage Input (note 1, 3) 5.0 V 5.0 1.5 V 1) Worst case package. 2) Max number of outputs defined as (n). Data inputs are driven 0V to 5.0V, (n-1) outputs switching and one output at GND. 3) Max number of data inputs (n) switching. (n-1) switching 0V to 5.0V. Inputs under test switching: 5.0V to threshold (VILD), 0V to threshold (VIHD), f=1MHz. 4/12 74VHC126 Figure 3: Test Circuit TEST tPLH, tPHL tPZL, tPLZ tPZH, tPHZ CL =15/50pF or equivalent (includes jig and probe capacitance) RL = R1 = 1K or equivalent RT = ZOUT of pulse generator (typically 50) SWITCH Open VCC GND Figure 4: Waveform - Propagation Delays (f=1MHz; 50% duty cycle) 5/12 74VHC126 Figure 5: Waveform - Output Enable And Disable Time (f=1MHz; 50% duty cycle) 6/12 74VHC126 SO-14 MECHANICAL DATA DIM. A A1 A2 B C D E e H h L k ddd 5.8 0.25 0.4 0 mm. MIN. 1.35 0.1 1.10 0.33 0.19 8.55 3.8 1.27 6.2 0.50 1.27 8 0.100 0.228 0.010 0.016 0 TYP MAX. 1.75 0.25 1.65 0.51 0.25 8.75 4.0 MIN. 0.053 0.004 0.043 0.013 0.007 0.337 0.150 0.050 0.244 0.020 0.050 8 0.004 inch TYP. MAX. 0.069 0.010 0.065 0.020 0.010 0.344 0.157 0016019D 7/12 74VHC126 TSSOP14 MECHANICAL DATA mm. DIM. MIN. A A1 A2 b c D E E1 e K L 0 0.45 0.60 0.05 0.8 0.19 0.09 4.9 6.2 4.3 5 6.4 4.4 0.65 BSC 8 0.75 0 0.018 0.024 1 TYP MAX. 1.2 0.15 1.05 0.30 0.20 5.1 6.6 4.48 0.002 0.031 0.007 0.004 0.193 0.244 0.169 0.197 0.252 0.173 0.0256 BSC 8 0.030 0.004 0.039 MIN. TYP. MAX. 0.047 0.006 0.041 0.012 0.0089 0.201 0.260 0.176 inch A A2 A1 b e K c L E D E1 PIN 1 IDENTIFICATION 1 0080337D 8/12 74VHC126 Tape & Reel SO-14 MECHANICAL DATA mm. DIM. MIN. A C D N T Ao Bo Ko Po P 6.4 9 2.1 3.9 7.9 12.8 20.2 60 22.4 6.6 9.2 2.3 4.1 8.1 0.252 0.354 0.082 0.153 0.311 TYP MAX. 330 13.2 0.504 0.795 2.362 0.882 0.260 0.362 0.090 0.161 0.319 MIN. TYP. MAX. 12.992 0.519 inch 9/12 74VHC126 Tape & Reel TSSOP14 MECHANICAL DATA mm. DIM. MIN. A C D N T Ao Bo Ko Po P 6.7 5.3 1.6 3.9 7.9 12.8 20.2 60 22.4 6.9 5.5 1.8 4.1 8.1 0.264 0.209 0.063 0.153 0.311 TYP MAX. 330 13.2 0.504 0.795 2.362 0.882 0.272 0.217 0.071 0.161 0.319 MIN. TYP. MAX. 12.992 0.519 inch 10/12 74VHC126 Table 10: Revision History Date 12-Nov-2004 Revision 5 Description of Changes Order Codes Revision - pag. 1. 11/12 74VHC126 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. The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners (c) 2004 STMicroelectronics - All Rights Reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 12/12 |
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