SN74LVT244B

`􀀀 State-of-the-Art Advanced BiCMOS Technology (ABT) Design for 3.3-V Operation and Low Static-Power Dissipation
`􀀀 High-Impedance State During Power Up and Power Down
`􀀀 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 V<sub>CC</sub> = 3.3 V, TA = 25°C
`􀀀 Ioff and Power-Up 3-State Support Hot Insertion
`􀀀 Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
`􀀀 ESD Protection Exceeds JESD 22
2000-V Human-Body Model (A114-A)
200-V Machine Model (A115-A)
1000-V Charged-Device Model (C101)
`􀀀 Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages, Ceramic Chip Carriers (FK), Ceramic Flat (W) Packages, and Ceramic (J) DIPs

Supply voltage range, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . 0.5 V to 4.6 V
Input voltage range, V_I (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V
Voltage range applied to any output in the high-impedance
or power-off state, V_O (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V
Voltage range applied to any output in the high state, V_O (see Note 1)  . . 0.5 V to VCC + 0.5 V
Current into any output in the low state, I_O: SN54LVT244B . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
                                                                       SN74LVT244B . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Current into any output in the high state, I_O (see Note 2): SN54LVT244B . . . .  .  .  .  .  . . . 48 mA
                                                                                             SN74LVT244B . . . . . . . .  . . . . . 64 mA
Input clamp current, I_IK (V_I < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . 50 mA
Output clamp current, I_OK (V_O < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . 50 mA
Package thermal impedance, _JA (see Note 3): DB package . . . . . . . . . . . . . . . . . . . . . . .. 70°C/W
                                                                          DW package . . . . . . . . . . . . . . . . . . . . . . . 58°C/W
                                                                          PW package . . . . . . . . . . . . . . . . . . .. . . . . 83°C/W
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . 65°C to 150°C
† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
2. This current flows only when the output is in the high state and VO > VCC.
3. The package thermal impedance is calculated in accordance with JESD 51.

These octal buffers and line drivers SN74LVT244B are designed specifically for low-voltage (3.3-V) V_CC operation, but with the
capability to provide a TTL interface to a 5-V system environment.

The SN74LVT244B is organized as two 4-bit line drivers with separate output-enable (OE) inputs. When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state.

About SN74LVT244B,When V_CC is between 0 and 1.5 V, the device is 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 SN74LVT244B are fully specified for hot-insertion applications using I_off 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.

The SN54LVT244B is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74LVT244B is characterized for operation from 40°C to 85°C.