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74LVX245
LOW VOLTAGE CMOS OCTAL BUS TRANSCEIVER (3-STATE) WITH 5V TOLERANT INPUTS
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HIGH SPEED: tPD=4.7ns (TYP.) at VCC = 3.3V 5V TOLERANT INPUTS POWER-DOWN PROTECTION ON INPUTS INPUT VOLTAGE LEVEL: VIL = 0.8V, VIH = 2V at VCC =3V LOW POWER DISSIPATION: ICC = 4 A (MAX.) at TA=25C LOW NOISE: VOLP = 0.5V (TYP.) at VCC =3.3V SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 4 mA (MIN) at VCC =3V BALANCED PROPAGATION DELAYS: tPLH tPHL OPERATING VOLTAGE RANGE: VCC(OPR) = 2V to 3.6V (1.2V Data Retention) PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 245 IMPROVED LATCH-UP IMMUNITY
SOP
TSSOP
Table 1: Order Codes
PACKAGE SOP TSSOP T&R 74LVX245MTR 74LVX245TTR
DESCRIPTION The 74LVX245 is a low voltage CMOS OCTAL BUS BUFFER (3-STATE) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It is ideal for low power, battery operated and low noise 3.3V applications. This IC is intended for two-way asynchronous communication between data busses; the direction of data transmission is determined by Figure 1: Pin Connection And IEC Logic Symbols
DIR input. The enable input G can be used to disable the device so that the busses are effectively isolated. 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. It combines high speed performance with the true CMOS low power consumption. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. All floating bus terminals during High Z state must be held HIGH or LOW.
August 2004
Rev. 5
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Figure 2: Input Equivalent Circuit Table 2: Pin Description
PIN N 1 2, 3, 4, 5, 6, 7, 8, 9 18, 17, 16, 15, 14, 13, 12, 11 19 10 20 SYMBOL DIR A1 to A8 B1 to B8 NAME AND FUNCTION Directional Control Data Inputs/Outputs Data Inputs/Outputs
G GND VCC
Output Enable Input Ground (0V) Positive Supply Voltage
Table 3: Truth Table
INPUTS G L L H
X :Don`t Care Z : High Impedance
FUNCTION OUTPUT DIR L H X A BUS OUTPUT INPUT Z B BUS INPUT OUTPUT Z A=B B=A Z
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 (note 1) Input Voltage Output Voltage Operating Temperature Input Rise and Fall Time (note 2) (VCC = 3V) Parameter Value 2 to 3.6 0 to 5.5 0 to VCC -55 to 125 0 to 100 Unit V V V C ns/V
1) Truth Table guaranteed: 1.2V to 3.6V 2) VIN from 0.8V to 2.0V
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Table 6: DC Specifications
Test Condition Symbol Parameter VCC (V) 2.0 3.0 3.6 2.0 3.0 3.6 2.0 3.0 3.0 VOL Low Level Output Voltage 2.0 3.0 3.0 IOZ High Impedance Output Leakage Current Input Leakage Current Quiescent Supply Current 3.6 3.6 3.6 IO=-50 A IO=-50 A IO=-4 mA IO=50 A IO=50 A IO=4 mA VI = VIH or VIL VO = VCC or GND VI = 5V or GND VI = VCC or GND TA = 25C Min. 1.5 2.0 2.4 0.5 0.8 0.8 1.9 2.9 2.58 0.0 0.0 0.1 0.1 0.36 0.25 0.1 4 2.0 3.0 1.9 2.9 2.48 0.1 0.1 0.44 2.5 1 40 Typ. Max. Value -40 to 85C Min. 1.5 2.0 2.4 0.5 0.8 0.8 1.9 2.9 2.4 0.1 0.1 0.55 5 1 40 A A A V V Max. -55 to 125C Min. 1.5 2.0 2.4 0.5 0.8 0.8 Max. V Unit
VIH
High Level Input Voltage Low Level Input Voltage High Level Output Voltage
VIL
V
VOH
II ICC
Table 7: Dynamic Switching Characteristics
Test Condition Symbol Parameter VCC (V) 3.3 TA = 25C Min. Typ. 0.5 -0.8 CL = 50 pF 2.0 -0.5 V Max. 0.8 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)
3.3
3.3
0.8
1) Worst case package. 2) Max number of outputs defined as (n). Data inputs are driven 0V to 3.3V, (n-1) outputs switching and one output at GND. 3) Max number of data inputs (n) switching. (n-1) switching 0V to 3.3V. Inputs under test switching: 3.3V to threshold (VILD), 0V to threshold (VIHD), f=1MHz.
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Table 8: AC Electrical Characteristics (Input tr = tf = 3ns)
Test Condition Symbol Parameter VCC (V) 2.7 2.7 3.3(*) tPZL tPZH Output Enable Time 3.3(*) 2.7 2.7 3.3(*) tPLZ tPHZ tOSLH tOSHL 3.3(*) 2.7 3.3(*) 2.7 3.3
(*)
Value TA = 25C Min. Typ. 6.1 8.6 4.5 7.2 7.1 9.6 5.5 8.0 11.6 9.7 0.5 0.5 Max. 11.4 14.9 7.1 10.6 13.8 17.3 8.8 12.3 16.0 11.4 1.0 1.0 -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. 13.5 17.0 8.5 12.0 16.5 20.0 10.5 14.0 19.0 13.0 1.5 1.5 -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. 15.0 18.0 9.5 13.0 17.5 21.0 12. 15.0 20.5 14.5 1.5 1.5 ns ns ns ns Unit
CL (pF) 15 50 15 50 15 50 15 50 50 50 50 50
tPLH tPHL
Propagation Delay Time
Output Disable Time Output to Output Skew Time (note 1,2)
1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switching in the same direction, either HIGH or LOW 2) Parameter guaranteed by design (*) Voltage range is 3.3V 0.3V
Table 9: Capacitive Characteristics
Test Condition Symbol Parameter VCC (V) 3.3 3.3 3.3 fIN = 10MHz TA = 25C Min. Typ. 5 10 32 Max. Value -40 to 85C Min. Max. 10 15 -55 to 125C Min. Max. 10 15 pF pF pF Unit
CIN Ci/o CPD
Input Capacitance Input/Output Capacitance Power Dissipation Capacitance (note 1)
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/8 (per circuit)
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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)
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Figure 5: Waveform - Output Enable And Disable Time (f=1MHz; 50% duty cycle)
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74LVX245
SO-20 MECHANICAL DATA
DIM. A A1 B C D E e H h L k ddd 10.00 0.25 0.4 0 mm. MIN. 2.35 0.1 0.33 0.23 12.60 7.4 1.27 10.65 0.75 1.27 8 0.100 0.394 0.010 0.016 0 TYP MAX. 2.65 0.30 0.51 0.32 13.00 7.6 MIN. 0.093 0.004 0.013 0.009 0.496 0.291 0.050 0.419 0.030 0.050 8 0.004 inch TYP. MAX. 0.104 0.012 0.020 0.013 0.512 0.299
0016022D
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74LVX245
TSSOP20 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 6.4 6.2 4.3 6.5 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 6.6 6.6 4.48 0.002 0.031 0.007 0.004 0.252 0.244 0.169 0.256 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 0.0079 0.260 0.260 0.176 inch
A
A2 A1 b e K c L E
D
E1
PIN 1 IDENTIFICATION
1
0087225C
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74LVX245
Tape & Reel SO-20 MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 10.8 13.2 3.1 3.9 11.9 12.8 20.2 60 30.4 11 13.4 3.3 4.1 12.1 0.425 0.520 0.122 0.153 0.468 TYP MAX. 330 13.2 0.504 0.795 2.362 1.197 0.433 0.528 0.130 0.161 0.476 MIN. TYP. MAX. 12.992 0.519 inch
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74LVX245
Tape & Reel TSSOP20 MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 6.8 6.9 1.7 3.9 11.9 12.8 20.2 60 22.4 7 7.1 1.9 4.1 12.1 0.268 0.272 0.067 0.153 0.468 TYP MAX. 330 13.2 0.504 0.795 2.362 0.882 0.276 0.280 0.075 0.161 0.476 MIN. TYP. MAX. 12.992 0.519 inch
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Table 10: Revision History
Date 27-Aug-2004 Revision 5 Description of Changes Ordering Codes Revision - pag. 1.
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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
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