74LVX4245 OCTAL DUAL SUPPLY BUS TRANSCEIVER ■ ■ ■ ■ ■ ■ ■ HIGH SPEED: tPD = 8.5 ns (MAX.) at VCCA=5.0V VCCB = 3.3V LOW POWER DISSIPATION: ICCA = ICCB =5µA(MAX.) at TA=25°C LOW NOISE: VOLP =0.3V (TYP.) at VCCA=5.5V VCCB=3.3V SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24mA (MIN) BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL OPERATING VOLTAGE RANGE: VCCA(OPR) = 4.5V to 5.5V (1.2V Data Retention) VCCB(OPR) = 2.7V to 3.6V (1.2V Data Retention) PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 4245 IMPROVED LATCH-UP IMMUNITY DESCRIPTION The 74LVX4245 is a dual supply low voltage CMOS OCTAL BUS TRANSCEIVER fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. Designed for use as an interface between a 5V bus and a 3.3V bus in a mixed 5V/3.3V supply systems, it achieves high speed operation while maintaining the CMOS low power dissipation. SOP TSSOP Table 1: Order Codes PACKAGE T&R SOP TSSOP 74LVX4245MTR 74LVX4245TTR This IC is intended for two-way asynchronous communication between data buses and the direction of data transmission is determined by DIR input. The enable input G can be used to disable the device so that the buses are effectively isolated. The A-port interfaces with the 5V bus, the B-port with the 3.3V bus. All inputs 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 August 2004 Rev. 6 1/13 74LVX4245 Figure 2: Input And Output Equivalent Circuit Table 2: Pin Description PIN N° SYMBOL NAME QND FUNCTION 2 3, 4, 5, 6, 7, 8, 9, 10 21, 20, 19, 18, 17, 16, 15, 14 22 11, 12, 13 23 1 DIR A1 to A8 Directional Control Data Inputs/Outputs B1 to B8 Data Inputs/Outputs G GND NC VCCA Output Enable Input Ground (0V) Not Connected Positive Supply Voltage 24 VCCB Positive Supply Voltage Table 3: Truth Table INPUTS FUNCTION OUTPUT G DIR A BUS B BUS L L H L H X OUTPUT INPUT Z INPUT OUTPUT Z A=B B=A Z X : Don’t Care Z : High Impedance Table 4: Absolute Maximum Ratings Symbol Parameter VCCA Supply Voltage VCCB Supply Voltage Value Unit -0.5 to +7.0 V -0.5 to +7.0 V DC Input Voltage -0.5 to VCCA + 0.5 V VI/OA DC I/O Voltage V VI/OB DC I/O Voltage -0.5 to VCCA + 0.5 -0.5 to VCCB + 0.5 VI V IIK DC Input Diode Current ± 20 mA IOK DC Output Diode Current ± 50 mA IOA DC Output Current ± 50 mA IOB DC Output Current ± 50 mA ICCA DC VCC or Ground Current ± 200 mA ICCB DC VCC or Ground Current ± 100 mA Pd Power Dissipation Tstg Storage Temperature TL Lead Temperature (10 sec) 180 mW -65 to +150 °C 300 °C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied 2/13 74LVX4245 Table 5: Recommended Operating Conditions Symbol Parameter Value Unit 4.5 to 5.5 V VCCA Supply Voltage (note 1) VCCB Supply Voltage (note 1) 2.7 to 3.6 V Input Voltage 0 to VCCA 0 to VCCA V 0 to VCCB -55 to 125 V °C 0 to 10 ns/V VI VI/OA I/O Voltage VI/OB I/O Voltage Top dt/dv Operating Temperature Input Rise and Fall Time (note 2) V 1) VIN from 30% to 70% of VCC 2) VCCA = 4.5 to 5.5V; VCCB = 2.7 to 3.6V; Table 6: DC Specifications For VCCA Test Condition Symbol Parameter VIHA High Level Input Voltage VILA Low Level Input Voltage VOHA High Level Output Voltage VOLA IIA Low Level Output Voltage Value TA = 25 °C VCCA VCCB (V) (V) Min. Typ. -40 to 85 °C -55 to 125°C Unit Max. Max. Max. 3.3 3.3 3.3 3.3 4.5 3.0 IO=-100 µA 4.4 4.5 3.0 IO=-24 mA 3.86 4.5 3.0 IO=100 µA 0.1 0.1 0.1 4.5 3.0 IO=24 mA 0.36 0.44 0.44 5.5 3.6 VI = VCC or GND ± 0.1 ±1 ±1 µA 5.5 3.6 VIA = VIHA or VILA VIB = VIHB or VILB VI/OA = VCCA or GND VIA = VCCA or GND VIB = VCCB or GND VIA = VCCA - 2.1V VIB = VCCB or GND ± 0.5 ±5 ±5 µA 5 50 50 µA 1.35 1.5 1.5 mA IOZA ICCtA Quiescent Supply Current 5.5 3.6 ∆ICCtA Maximum Quiescent Supply Current / Input (An, DIR, G) 5.5 3.6 2.0 2.0 Min. 4.5 5.5 4.5 5.5 Input Leakage Current High Impedance Output Leakage Current 2.0 2.0 Min. 0.8 0.8 4.5 0 2.0 2.0 0.8 0.8 V 0.8 0.8 4.4 4.4 3.76 3.76 V V V 3/13 74LVX4245 Table 7: DC Specifications For VCCB Test Condition Symbol Parameter VIHB High Level Input Voltage VILB Low Level Input Voltage VOHB High Level Output Voltage VOLB IIB Low Level Output Voltage Value TA = 25 °C VCCA VCCB (V) (V) Min. 5.0 5.0 5.0 5.0 3.6 2.7 3.6 2.7 4.5 3.0 IO=-100 µA 2.9 4.5 3.0 IO=-12 mA 4.5 2.7 IO=-8 mA Typ. -40 to 85 °C -55 to 125°C Unit Max. 2.0 2.0 Min. Max. 2.0 2.0 0.8 0.8 3.0 Min. Max. 2.0 2.0 0.8 0.8 V 0.8 0.8 2.9 2.9 2.48 2.4 2.4 2.26 2.2 2.2 V V 4.5 3.0 IO=100 µA 0.1 0.1 0.1 4.5 3.0 IO=12 mA 0.31 0.40 0.40 4.5 2.7 IO=8 mA 0.31 0.40 0.40 5.5 3.6 VI = VCCA or GND ± 0.1 ±1 ±1 µA 5.5 3.6 VIA = VIHA or VILA VI/Ob = VCCb or GND VIA = VCCA or GND VIB = VCCB or GND VIA = VCCA or GND VIB = VCCB - 0.6V ± 0.5 ±5 ±5 µA 5 50 5 µA 0.35 0.5 0.35 mA IOZB Input Leakage Current High Impedance Output Leakage Current ICCtB Quiescent Supply Current 5.5 3.6 ∆ICCtB Maximum Quiescent Supply Current / Input 5.5 3.6 0.0 V Table 8: Dynamic Switching Characteristics Test Condition Symbol Parameter VOLPA Dynamic Low Level Quiet Output (note 1, 2) Dynamic Low Level Quiet Output (note 1, 2) Dynamic High Voltage Input (note 1, 3) Dynamic Low Voltage Input (note 1, 3) Dynamic High Voltage Input (note 1, 3) Dynamic Low Voltage Input (note 1, 3) VOLPB VIHDA VILDA VIHDB VILDB VCCA VCCB (V) (V) 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 Value TA = 25 °C Min. -1.2 Typ. Max. 1.0 1.5 Max. Min. Max. 1.2 V -0.5 2 0.8 V V 2 0.8 Min. V -0.6 0.8 -0.8 -40 to 85 °C -55 to 125°C Unit V V 1) Worst case package 2) Max number of output 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: 3V to threshold (VILD). 0V to threshold (VIHD) f = 1MHz 4/13 74LVX4245 Table 9: AC Electrical Characteristics (CL = 50pF, Input tr = tf = 3ns) Value (3) Test Condition Symbol tPLH tPHL tPZL tPZH tPLZ tPHZ tPLH tPHL tPZL tPZH tPLZ tPHZ tOSLH tOSHL Parameter Propagation Delay Time (An to Bn) Propagation Delay Time (An to Bn) Output Enable Time (G to Bn) Output Enable Time (G to Bn) Output Disable Time (G to Bn) Output Disable Time (G to Bn) Propagation Delay Time (Bn to An) Propagation Delay Time (Bn to An) Output Enable Time (G to An) Output Enable Time (G to An) Output Disable Time (G to An) Output Disable Time (G to An) Output To Output Skew Time (note1, 2) VCCB (V) TA = 25°C Min. Typ. Max. 2.7 (*) 5.1 -55 to 125°C Min. Max. Min. Max. 1.0 10.0 1.0 11.0 1.0 9.0 1.0 10.0 1.0 10.0 1.0 11.0 1.0 9.0 1.0 10.0 1.0 11.5 1.0 12.5 1.0 10.5 1.0 11.5 1.0 11.5 1.0 11.5 10.5 1.0 11.5 3.0 2.7 1.0 3.0(*) 2.7 1.0 5.3 8.5 (*) 3.0 2.7 1.0 6.5 10.0 3.0(*) 2.7 1.0 6.7 10.0 1.0 1.0 10.0 1.0 11.0 3.0(*) 2.7 1.0 6.0 9.5 1.0 10.0 1.0 11.0 1.0 7.5 1.0 8.5 3.0(*) 2.7 1.0 1.0 7.0 1.0 8.0 1.0 10.0 1.0 11.0 3.0(*) 2.7 1.0 1.0 9.0 1.0 10.0 1.0 10.0 1.0 11.0 3.0(*) 2.7 1.0 5.5 8.5 1.0 9.0 1.0 10.0 1.0 10.0 1.0 11.0 3.0(*) 1.0 5.2 9.0 1.0 9.5 1.0 10.5 1.0 10.0 1.0 11.0 9.5 1.0 10.5 3.3 5.4 8.5 -40 to 85°C 6.5 8.5 2.7 3.0(*) 2.7 1.0 5.8 9.0 1.0 1.0 7.5 1.0 8.5 3.0(*) 2.7 1.0 3.9 7.0 1.0 7.5 1.0 8.5 1.0 7.5 1.0 8.5 3.0(*) 2.7 1.0 7.0 1.0 3.3(**) 2.9 6.5 0.5 0.5 1.0 1.0 1.0 1.5 1.5 Unit ns ns ns ns ns ns 8.0 1.5 1.5 ns 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 (tOSLH = | tPLHm - tPLHn|, tOSHL = | tPHLm - tPHLn| 2) Parameter guaranteed by design 3) Typical values at VCCA = 5.0V, VCCB = 3.3V (*) Voltage range is 3.0V ± 0.3V 5/13 74LVX4245 Table 10: Capacitive Characteristics Test Condition Symbol CINA CI/O CPD CPD Parameter Input Capacitance Input/Output Capacitance Dynamic Low Level Quiet Output (note 1) A to B Dynamic Low Level Quiet Output (note 1) B to A VCCA VCCB (V) (V) open open Value TA = 25 °C Min. -40 to 85 °C -55 to 125°C Unit Typ. Max. 4.5 10 Min. Max. Min. 10 Max. 10 V 3.3 5.0 10 V 3.3 5.0 55 V 3.3 5.0 40 V 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/8 (per circuit) Figure 3: Test Circuit TEST SWITCH tPLH, tPHL Open tPZLH, tPLZ 2VCC tPZH, tPHZ Open CL = 50pF or equivalent (includes jig and probe capacitance) RL = R1 = 500Ω or equivalent RT = ZOUT of pulse generator (typically 50Ω) 6/13 74LVX4245 Figure 4: Waveform - Propagation Delays (f=1MHz; 50% duty cycle) Figure 5: Waveform - Output Enable And Disable Time (f=1MHz; 50% duty cycle) 7/13 74LVX4245 SO-24 MECHANICAL DATA DIM. mm. MIN. TYP inch MAX. MIN. TYP. MAX. A 2.35 2.65 0.093 0.104 A1 0.1 0.30 0.004 0.012 B 0.33 0.51 0.013 0.020 C 0.23 0.32 0.009 0.013 D 15.20 15.60 0.598 0.614 E 7.4 7.6 0.291 0.299 e 1.27 0.050 H 10.00 10.65 0.394 0.419 h 0.25 0.75 0.010 0.030 L 0.4 1.27 0.016 0.050 k 0° 8° 0° 8° ddd 0.100 0.004 0070769C 8/13 74LVX4245 TSSOP24 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. A MIN. TYP. MAX. 1.1 A1 0.05 0.15 A2 0.043 0.002 0.006 0.9 0.035 b 0.19 0.30 0.0075 0.0118 c 0.09 0.20 0.0035 0.0079 D 7.7 7.9 0.303 0.311 E 4.3 4.5 0.169 0.177 e 0.65 BSC 0.0256 BSC H 6.25 6.5 0.246 0.256 K 0° 8° 0° 8° L 0.50 0.70 0.020 0.028 A A2 A1 b K e L H c D E PIN 1 IDENTIFICATION 1 7047476B 9/13 74LVX4245 Tape & Reel SO-24 MECHANICAL DATA mm. inch DIM. MIN. A MAX. MIN. 330 13.2 TYP. MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 10/13 TYP 0.504 30.4 0.519 1.197 Ao 10.8 11.0 0.425 0.433 Bo 15.7 15.9 0.618 0.626 Ko 2.9 3.1 0.114 0.122 Po 3.9 4.1 0.153 0.161 P 11.9 12.1 0.468 0.476 74LVX4245 Tape & Reel TSSOP24 MECHANICAL DATA mm. inch DIM. MIN. A TYP MAX. MIN. 330 MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 TYP. 0.504 22.4 0.519 0.882 Ao 6.8 7 0.268 0.276 Bo 8.2 8.4 0.323 0.331 Ko 1.7 1.9 0.067 0.075 Po 3.9 4.1 0.153 0.161 P 11.9 12.1 0.468 0.476 11/13 74LVX4245 Table 11: Revision History Date Revision 27-Aug-2004 6 12/13 Description of Changes Ordering Codes Revision - pag. 1. 74LVX4245 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. 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