Part Number : SN74ALVTH16827VR
Function : 2.5-V/3.3-V 20-BIT BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
Pinouts : SSOP, TSSOP 56 Pin Type
Maker : Texas Instruments
Pinouts : 
Description :
The SN74ALVTH16827VR, 74ALVTH16827 devices are 20-bit buffers/line drivers designed for 2.5-V or 3.3-V VCCoperation, but with the capability to provide a TTL interface to a 5-V system environment.
The devices are composed of two 10-bit sections with separate output-enable signals. For either 10-bit buffer section, the two output-enable (1OE1and 1OE2, or 2OE1and 2OE2) inputs must be low for the corresponding Y outputs to be active. If either output-enable input is high, the outputs of that 10-bit buffer section are in the high-impedance state.
When VCCis between 0 and 1.2 V, the device is in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.2 V, OEshould be tied to VCCthrough a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
Features :
1. Typical VOLP (Output Ground Bounce) < 0.8 V at VCC = 3.3 V, TA = 25°C
2. High Drive (-24/24 mA at 2.5-V and -32/64 mA at 3.3-V VCC)
3. Power Off Disables Outputs, Permitting Live Insertion
4. High-Impedance State During Power Up and Power Down Prevents Driver Conflict
Official Homepage : https://www.ti.com/product/SN74ALVTH16827
Datasheet PDF Download : 
Others datasheet of same file :
74ALVTH16827DLG4, 74ALVTH16827DLRG4, 74ALVTH16827GRE4,
74ALVTH16827GRG4, 74ALVTH16827VRE4