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This 16-bit edge-triggered D-type flip-flop is designed for 1.65-V to 3.6-V VCC operation.
The SN74ALVCH16374 is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. It can be used as two 8-bit flip-flops or one 16-bit flip-flop. On the positive transition of the clock (CLK) input, the Q outputs of the flip-flop take on the logic levels at the data (D) inputs. OE\ can be used to place the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and the increased drive provide the capability to drive bus lines without need for interface or pullup components.
OE\ does not affect internal operations of the flip-flop. Old data can be retained or new data can be entered while 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 holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | SN74ALVCH16374 datasheet (Rev. L) | Sep 7, 2004 | |
| Application note | Power-Up Behavior of Clocked Devices (Rev. B) | PDF | HTML | Dec 15, 2022 | |
| Application note | An Overview of Bus-Hold Circuit and the Applications (Rev. B) | Sep 17, 2018 |
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SSOP (DL) | 48 | Ultra Librarian |
| TVSOP (DGV) | 48 | Ultra Librarian |
| TSSOP (DGG) | 48 | Ultra Librarian |
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