74LVC1T45

74LVC1T45 SINGLE BIT DUAL POWER SUPPLY TRANSLATING TRANSCEIVER WITH 3 STATE OUTPUTS Description The 74LVC1T45 is a single-bit, dual-supply transceiver with tri-state outputs suitable for transmitting a single logic bit across different voltage domains. The A input/output pin is designed to track VCCA while the B input/output tracks VCCB. This arrangement allows for universal low-voltage translation between any voltages from 1.65V to 5.5V. The Direction pin (DIR) controls the direction of the transceiver and in a logic voltage related to VCCA. When a high logic level is applied to DIR, the A pin becomes an input, and the B pin becomes the output. Conversely, the roles of A and B are reversed when DIR is asserted low. The tri-state feature occurs when either of the power supply voltages are zero. This is also an Ioff feature and allows for the output to remain in a high impedance state with both power supplies at 0V, which prevents and damages backflow currents and provides powerdown electrical isolation up to 5.5V as not to interfere with any logic activity on pin A or B. Pin Assignments (Top View) Vcc(A) 1 6 Vcc(B) GND 2 5 DIR A3 4B SOT26 SOT363 SOT563 (Top View) Vcc(A) 1 6 Vcc(B) GND 2 5 DIR A 3 4B X2-DFN1410-6 (Bottom View) A3 4B GND 2 5 DIR Vcc(A) 1 6 Vcc(B) X2-DFN1409-6 Chip Scale Alternative (Top View) Vcc(A) 1 GND 2 A3 6 Vcc(B) 5 DIR 4B X2-DFN1010-6 Features Wide Supply Voltage Range:  VCC(A): from 1.65V to 5.5V  VCC(B): from 1.65V to 5.5V ...