74LVX3245 OCTAL DUAL SUPPLY BUS TRANSCEIVER HIGH SPEED: t = 8ns (MAX.) at T =25C PD A V = 3.3V, V = 5.0V CCA CCB LOW POWER DISSIPATION: I = I = 5 A(MAX.) at T =25C CCA CCB A LOW NOISE: V =0.3V (TYP.) at V =3.3V OLP CC SOP TSSOP SYMMETRICAL OUTPUT IMPEDANCE: I = I = 24mA (MIN) OH OL BALANCED PROPAGATION DELAYS: Table 1: Order Codes t t PLH PHL OPERATING VOLTAGE RANGE: PACKAGE T & R V (OPR) = 2.7V to 3.6V (1.2V Data Retention) CCA SOP 74LVX3245MTR V (OPR) = 4.5V to 5.5V (1.2V Data Retention) CCB TSSOP 74LVX3245TTR PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 3245 IMPROVED LATCH-UP IMMUNITY This IC is intended for two-way asynchronous communication between data buses and the DESCRIPTION direction of data transmission is determined by The 74LVX3245 is a dual supply low voltage DIR input. The enable input G can be used to CMOS OCTAL BUS TRANSCEIVER fabricated disable the device so that the buses are effectively isolated. with sub-micron silicon gate and double-layer 2 metal wiring C MOS technology. Designed for use The A-port interfaces with the 3V bus, the B-port as an interface between a 5V bus and a 3.3V bus with the 5V bus. in a mixed 5V/3.3V supply systems, it achieves All inputs are equipped with protection circuits high speed operation while maintaining the CMOS against static discharge, giving them 2KV ESD low power dissipation. immunity and transient excess voltage. Figure 1: Pin Connection And IEC Logic Symbols Rev. 4 August 2004 1/1374LVX3245 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