| Number of channels (#) | 18 |
| Technology Family | ALVC |
| Supply voltage (Min) (V) | 1.65 |
| Supply voltage (Max) (V) | 3.6 |
| Input type | Standard CMOS |
| Output type | 3-State |
| Clock Frequency (Max) (MHz) | 150 |
| IOL (Max) (mA) | 24 |
| IOH (Max) (mA) | -24 |
| ICC (Max) (uA) | 40 |
| Features | Balanced outputs, Very high speed (tpd 5-10ns), Over-voltage tolerant inputs, Bus-hold |
- Member of the Texas Instruments Widebus? Family
- EPIC? (Enhanced-Performance Implanted CMOS) Submicron Process
- ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
- Latch-Up Performance Exceeds 250 mA Per JESD 17
- Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
- Package Options Include Plastic 300-mil Shrink Small-Outline (DL) and Thin Shrink Small-Outline (DGG) Packages
Widebus, EPIC are trademarks of Texas Instruments.
This 18-bit bus-interface flip-flop is designed for 1.65-V to 3.6-V VCC operation.
The SN74ALVCH16823 features 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. This device is particularly suitable for implementing wider buffer registers, I/O ports, bidirectional bus drivers with parity, and working registers.
The SN74ALVCH16823 can be used as two 9-bit flip-flops or one 18-bit flip-flop. With the clock-enable (CLKEN) input low, the D-type flip-flops enter data on the low-to-high transitions of the clock. Taking CLKEN high disables the clock buffer, thus latching the outputs. Taking the clear (CLR) input low causes the Q outputs to go low independently of the clock.
A buffered output-enable (OE) input can be used to place the nine 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 increased drive provide the capability to drive bus lines without need for interface or pullup components.
The output-enable (OE) input does not affect the internal operation of the flip-flops. 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 is provided to hold unused or floating data inputs at a valid logic level.
The SN74ALVCH16823 is characterized for operation from -40°C to 85°C.