1. General description
The 74AUP1T45 is a single bit transceiver featuring two data input-outputs (A and B), a direction
control input (DIR) and dual supply pins (VCC(A) and VCC(B)) which enable bidirectional level
translation. Both VCC(A) and VCC(B) can be supplied at any voltage between 1.1 V and 3.6 V making
the device suitable for interfacing between any of the low voltage nodes (1.2 V, 1.5 V, 1.8 V, 2.5 V
and 3.3 V). Pins A and DIR are referenced to VCC(A) and pin B is referenced to VCC(B). A HIGH on
DIR allows transmission from A to B and a LOW on DIR allows transmission from B to A.
Schmitt trigger action on all inputs makes the circuit tolerant of slower input rise and fall times
across the entire VCC(A) and VCC(B) ranges. The device ensures low static and dynamic power
consumption and is fully specified for partial power-down applications using IOFF. The IOFF circuitry
disables the output, preventing any damaging backflow current through the device when it is
powered down. In suspend mode when either VCC(A) or VCC(B) are at GND, both A and B are in the
high-impedance OFF-state.
2. Features and benefits
• Wide supply voltage range:
• VCC(A): 1.1 V to 3.6 V
• VCC(B): 1.1 V to 3.6 V
• High noise immunity
• Complies with JEDEC standards:
• JESD8-7 (1.2 V to 1.95 V)
• JESD8-5 (1.8 V to 2.7 V)
• JESD8-B (2.7 V to 3.6 V)
• ESD protection:
• HBM JESD22-A114F Class 3A exceeds 5000 V
• MM JESD22-A115-A exceeds 200 V
• CDM JESD22-C101E exceeds 1000 V
• Low static power consumption; ICC = 0.9 μA (maximum)
• Suspend mode
• Latch-up performance exceeds 100 mA per JESD 78 Class II
• Inputs accept voltages up to 3.6 V
• Low noise overshoot and undershoot < 10 % of VCC
• IOFF circuitry provides partial power-down mode operation
• Multiple package options
• Specified from -40 °C to +85 °C and -40 °C to +125 °C