74LVX4245 OCTAL DUAL SUPPLY BUS TRANSCEIVER HIGH SPEED: t = 8.5 ns (MAX.) at PD V =5.0V V = 3.3V CCA CCB LOW POWER DISSIPATION: I = I =5 A(MAX.) at T =25C CCA CCB A LOW NOISE: V =0.3V (TYP.) at OLP V =5.5V V =3.3V SOP TSSOP CCA CCB SYMMETRICAL OUTPUT IMPEDANCE: I = I = 24mA (MIN) OH OL Table 1: Order Codes BALANCED PROPAGATION DELAYS: t t PLH PHL PACKAGE T & R OPERATING VOLTAGE RANGE: SOP 74LVX4245MTR V (OPR) = 4.5V to 5.5V (1.2V Data Retention) CCA TSSOP 74LVX4245TTR V (OPR) = 2.7V to 3.6V (1.2V Data Retention) CCB PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 4245 This IC is intended for two-way asynchronous IMPROVED LATCH-UP IMMUNITY communication between data buses and the direction of data transmission is determined by DESCRIPTION DIR input. The enable input G can be used to The 74LVX4245 is a dual supply low voltage disable the device so that the buses are effectively CMOS OCTAL BUS TRANSCEIVER fabricated isolated. with sub-micron silicon gate and double-layer The A-port interfaces with the 5V bus, the B-port 2 metal wiring C MOS technology. Designed for use with the 3.3V bus. as an interface between a 5V bus and a 3.3V bus All inputs are equipped with protection circuits in a mixed 5V/3.3V supply systems, it achieves against static discharge, giving them 2KV ESD high speed operation while maintaining the CMOS immunity and transient excess voltage. low power dissipation. Figure 1: Pin Connection And IEC Logic Symbols Rev. 6 August 2004 1/13 Obsolete Product(s) - Obsolete Product(s)74LVX4245 Figure 2: Input And Output Equivalent Circuit Table 2: Pin Description PIN N SYMBOL NAME QND FUNCTION 2 DIR Directional Control 3, 4, 5, 6, 7, A1 to A8 Data Inputs/Outputs 8, 9, 10 21, 20, 19, B1 to B8 Data Inputs/Outputs 18, 17, 16, 15, 14 22 G Output Enable Input 11, 12, 13 GND Ground (0V) 23 NC Not Connected 1V Positive Supply Voltage CCA 24 V Positive Supply Voltage CCB Table 3: Truth Table INPUTS FUNCTION OUTPUT G DIR A BUS B BUS L L OUTPUT INPUT A = B L H INPUT OUTPUT B = A H X ZZZ X : Dont Care Z : High Impedance Table 4: Absolute Maximum Ratings Symbol Parameter Value Unit V Supply Voltage -0.5 to +7.0 V CCA V Supply Voltage -0.5 to +7.0 V CCB V DC Input Voltage -0.5 to V + 0.5 V I CCA V DC I/O Voltage -0.5 to V + 0.5 V I/OA CCA V DC I/O Voltage -0.5 to V + 0.5 V I/OB CCB I DC Input Diode Current 20 mA IK I DC Output Diode Current 50 mA OK I DC Output Current 50 mA OA I DC Output Current 50 mA OB I DC V or Ground Current 200 mA CCA CC I DC V or Ground Current 100 mA CCB CC P Power Dissipation 180 mW d T Storage Temperature -65 to +150 C stg T Lead Temperature (10 sec) 300 C L Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied 2/13 Obsolete Product(s) - Obsolete Product(s)