SN74LVTH162244DGGR

The 'LVTH162244 devices are 16-bit buffers and line drivers designed for low-voltage (3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment. These devices can be used as four 4-bit buffers, two 8-bit buffers, or one 16-bit buffer. These devices provide true outputs and symmetrical active-low output-enable (OE¯) inputs. The outputs, which are designed to source or sink up to 12 mA, include equivalent 22-Ω series resistors to reduce overshoot and undershoot. Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended. When VCC is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V, OE¯ should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. These devices are fully specified for hot-insertion applications using Ioff and power-up 3-state. The Ioff circuitry disables the outputs, preventing damaging current backflow through the devices when they are powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict.

Applications

• System buffer and line driver applications
• Mixed-voltage system interface scenarios
• Hot-plug application scenarios

Key features

• Output Ports Have Equivalent 22-Ω Series Resistors, So No External Resistors Are Required
• Support Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V Vcc)
• Support Unregulated Battery Operation Down to 2.7 V
• Typical VoLP (Output Ground Bounce) < 0.8 V at VCC = 3.3V, TA = 25℃
• Ioff and Power-Up 3-State Support Hot Insertion
• Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
• Distributed Vcc and GND Pins Minimize High-Speed Switching Noise
• Flow-Through Architecture Optimizes PCB Layout
• Latch-Up Performance Exceeds 500 mA Per JESD 17
• ESD Protection Exceeds JESD 22 2000-V Human-Body Model (A114-A) 200-V Machine Model (A115-A)