74AVCH4T245PW: 4-bit dual supply translating transceiver with configurable voltage translation; 3-state
The 74AVCH4T245 is a 4-bit, dual supply transceiver that enables bidirectional level translation. The device can be used as two 2-bit transceivers or as a 4-bit transceiver. It features two 2-bit input-output ports (nAn and nBn), a direction control input (nDIR), a output enable input (nOE) and dual supply pins (VCC(A) and VCC(B)). Both VCC(A) and VCC(B) can be supplied at any voltage between 0.8 V and 3.6 V making the device suitable for translating between any of the low voltage nodes (0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V and 3.3 V). Pins nAn, nOE and nDIR are referenced to VCC(A) and pins nBn are referenced to VCC(B). A HIGH on nDIR allows transmission from nAn to nBn and a LOW on nDIR allows transmission from nBn to nAn. The output enable input (nOE) can be used to disable the outputs so the buses are effectively isolated.
The device 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 level, both nAn and nBn outputs are in the high-impedance OFF-state. The bus hold circuitry on the powered-up side always stays active.
The 74AVCH4T245 has active bus hold circuitry which is provided to hold unused or floating data inputs at a valid logic level. This feature eliminates the need for external pull-up or pull-down resistors.
74AVCH4T245PW: Product Block Diagram
Outline 3d SOT403-1
Data Sheets (1)
Application Notes (2)
Brochures (2)
Selector Guides (2)
Package Information (1)
Packing (1)
Supporting Information (1)
Ordering Information
| Product | Status | Family | Function | VCC(A) (V) | VCC(B) (V) | Description | Package version | Logic switching levels | Output drive capability (mA) | tpd (ns) | No of bits | Power dissipation considerations | Tamb (Cel) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package name | No of pins |
|---|
| 74AVCH4T245PW | Active | AVC(M) | Level shifters/translators | 0.8 - 3.6 | 0.8 - 3.6 | 4-bit dual-supply voltage translating transceiver with bus hold (3-state) | SOT403-1 | CMOS/LVTTL | +/- 12 | 2.1 | 4 | very low | -40~125 | 124 | 4.4 | 53.6 | TSSOP16 | 16 |
Package Information
| Product ID | Package Description | Outline Version | Reflow/Wave Soldering | Packing | Product Status | Part NumberOrdering code(12NC) | Marking | Chemical Content | RoHS / Pb Free / RHF | LeadFree Conversion Date | MSL | MSL LF |
|---|
| 74AVCH4T245PW | | SOT403-1 | SSOP-TSSOP-VSO-WAVE | Reel 13" Q1/T1 | Active | 74AVCH4T245PW,118
(9352 845 89118) | CH4T245 | 74AVCH4T245PW |    | Always Pb-free | 1 | 1 |
| Bulk Pack | Active | 74AVCH4T245PW,112
(9352 845 89112) | CH4T245 | 74AVCH4T245PW | | Always Pb-free | 1 | 1 |
