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Octal buffer/line driver; 3-state
The 74AHC244-Q100; 74AHCT244-Q100 is an 8-bit buffer/line driver with 3-state outputs. The device can be used as two 4-bit buffers or one 8-bit buffer. The device features two output enables (1OE and 2OE), each controlling four of the 3-state outputs. A HIGH on nOE causes the outputs to assume a high-impedance OFF-state. Inputs are overvoltage tolerant. This feature allows the use of these devices as translators in mixed voltage environments.
This product has been qualified to the Automotive Electronics Council (AEC) standard Q100 (Grade 1) and is suitable for use in automotive applications.
Automotive product qualification in accordance with AEC-Q100 (Grade 1)
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
Wide supply voltage range from 2.0 V to 5.5 V
Balanced propagation delays
All inputs have Schmitt-trigger action
Overvoltage tolerant inputs to 5.5 V
High noise immunity
CMOS low power dissipation
Input levels:
For 74AHC244-Q100: CMOS level
For 74AHCT244-Q100: TTL level
ESD protection:
MIL-STD-883, method 3015 exceeds 2000 V
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V (C = 200 pf, R = 0 Ω)
Latch-up performance exceeds 100 mA per JESD 78 Class II Level A
Multiple package options
DHVQFN package with Side-Wettable Flanks enabling Automatic Optical Inspection (AOI) of solder joints
| Type number | Product status | VCC (V) | Logic switching levels | Output drive capability (mA) | fmax (MHz) | Nr of bits | Power dissipation considerations | Tamb (°C) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package name |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 74AHC244BQ-Q100 | Production | 2.0 - 5.5 | CMOS | ± 8 | 60 | 8 | low | -40~125 | 78 | 9.1 | 50 | DHVQFN20 |
| 74AHC244D-Q100 | Production | 2.0 - 5.5 | CMOS | ± 8 | 60 | 8 | low | -40~125 | 85 | 27.2 | 61 | SO20 |
| 74AHC244PW-Q100 | Production | 2.0 - 5.5 | CMOS | ± 8 | 60 | 8 | low | -40~125 | 100 | 4.6 | 44.7 | TSSOP20 |
| 74AHCT244BQ-Q100 | Production | 4.5 - 5.5 | TTL | ± 8 | 60 | 8 | low | -40~125 | 78 | 9.1 | 50 | DHVQFN20 |
| 74AHCT244D-Q100 | Production | 4.5 - 5.5 | TTL | ± 8 | 60 | 8 | low | -40~125 | 85 | 27.2 | 61 | SO20 |
| 74AHCT244PW-Q100 | Production | 4.5 - 5.5 | TTL | ± 8 | 60 | 8 | low | -40~125 | 100 | 4.6 | 44.7 | TSSOP20 |
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