These octal buffers and line drivers are designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. Together with the SN74BCT2241 and the ’BCT2244 devices, these devices provide the choice of selected combinations of inverting and noninverting outputs, symmetrical active-low output-enable (OE) inputs, and complementary OE and (OE) inputs. These devices feature high fan-out and improved fan-in.
The ’BCT2240 devices are 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.
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.
The outputs, which are designed to source or sink up to 12 mA, include 33-
series resistors to reduce overshoot
| Technology family | BCT |
| Supply voltage (min) (V) | 4.5 |
| Supply voltage (max) (V) | 5.5 |
| Number of channels | 8 |
| IOL (max) (mA) | 12 |
| IOH (max) (mA) | -12 |
| Supply current (max) (µA) | 76000 |
| Input type | TTL-Compatible CMOS |
| Output type | 3-State |
| Features | Balanced outputs, Damping resistors, Over-voltage tolerant inputs, Very high speed (tpd 5-10ns) |
| Rating | Military |
| Operating temperature range (°C) | -55 to 125 |
| CDIP (J) | 20 | 167.464 mm² 24.2 x 6.92 |
| LCCC (FK) | 20 | 79.0321 mm² 8.89 x 8.89 |
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