SN54LVTH244A-SP Texas instruments

SN54LVTH244A-SP

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SN54LVTH244A-SP

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Описание

These octal buffers and line drivers are designed specifically for low-voltage (3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment. The LVTH244A devices are organized as two 4-bit line drivers with separate output-enable (OE)\ inputs. When OE\ is low, the devices pass data from the A inputs to the Y outputs. When OE\ is high, the outputs are in the high-impedance state. To ensure the high-impedance state during power up or power down, 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. Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended. 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.

Support Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V V_CC)
Typical V_OLP (Output Ground Bounce)
<0.8 V at V_CC = 3.3 V, T_A = 25°C
Support Unregulated Battery Operation Down to 2.7 V
I_off and Power-Up 3-State Support Hot Insertion
Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
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)

Technology family	LVT
Supply voltage (min) (V)	2.7
Supply voltage (max) (V)	3.6
Number of channels	8
IOL (max) (mA)	48
Supply current (max) (µA)	5000
IOH (max) (mA)	-24
Input type	TTL-Compatible CMOS
Output type	3-State
Features	Bus-hold, Over-voltage tolerant inputs, Partial power down (Ioff), Power up 3-state, Ultra high speed (tpd
Rating	Space
Operating temperature range (°C)	-55 to 125