74LVCH2T45DC,125

The 74LVC2T45; 74LVCH2T45 are dual bit, dual supply translating transceivers with 3-state outputs that enable bidirectional level translation. They feature two 2-bits input-output ports (nA and nB), a direction control input (DIR) and dual supply pins (VCC(A) and VCC(B)). Both VCC(A) and VCC(B) can be supplied at any voltage between 1.2 V and 5.5 V making the device suitable for translating between any of the low voltage nodes (1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V and 5.0 V). Pins nA and DIR are referenced to VCC(A) and pins nB are referenced to VCC(B). A HIGH on DIR allows transmission from nA to nB and a LOW on DIR allows transmission from nB to nA. The devices are 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 level, both A port and B port are in the high-impedance OFF-state. Active bus hold circuitry in the 74LVCH2T45 holds unused or floating data inputs at a valid logic level.

Applications

• Level translation between low-voltage nodes (1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V)
• Bidirectional level translation
• Partial power-down applications
• Suspend mode
• Data transfer rate: 420 Mbps (3.3 V to 5.0 V translation)
• 210 Mbps (translation to 3.3 V)
• 140 Mbps (translation to 2.5 V)
• 75 Mbps (translation to 1.8 V)
• 60 Mbps (translation to 1.5 V)

Key features

• Wide supply voltage range: VCC(A): 1.2 V to 5.5 V VCC(B): 1.2 V to 5.5 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) JESD8C (2.7 V to 3.6 V) JESD36 (4.5 V to 5.5 V)
• Maximum data rates: 420 Mbps (3.3 V to 5.0 V translation)
• 210 Mbps (translate to 3.3 V)
• 140 Mbps (translate to 2.5 V)
• 75 Mbps (translate to 1.8 V)
• 60 Mbps (translate to 1.5 V)
• Suspend mode
• Latch-up performance exceeds 100 mA per JESD 78 Class II
• ±24 mA output drive (VCC = 3.0 V)
• Inputs accept voltages up to 5.5 V
• Low power consumption: 16 μA maximum ICC
• IOFF circuitry provides partial Power-down mode operation
• ESD protection: HBM: ANSI/ESDA/JEDEC JS-001 class 3A exceeds 4000 V CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
• Multiple package options
• Specified from -40 °C to +85 °C and -40 °C to +125 °C