These dual 4-bit D-type edge-triggered flip-flops feature 3-state outputs designed specifically as bus drivers. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.
The edge-triggered flip-flops enter data on the low-to-high transition of the clock (CLK) input. The SN54ALS874B, SN74ALS874B, and SN74AS874 have clear (
) inputs and noninverting Q outputs. The SN74ALS876A and SN74AS876 have preset (
) inputs and inverting Q outputs; taking low causes the four Q or Q outputs to go low independently of the clock.
The SN54ALS874B is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS874B, SN74ALS876A, SN74AS874, and SN74AS876 devices are characterized for operation from 0°C to 70°C.
| Number of channels | 8 |
| Technology family | AS |
| Supply voltage (min) (V) | 4.5 |
| Supply voltage (max) (V) | 5.5 |
| Input type | Bipolar |
| Output type | 3-State |
| Clock frequency (max) (MHz) | 100 |
| IOL (max) (mA) | 48 |
| IOH (max) (mA) | -15 |
| Supply current (max) (µA) | 160000 |
| Features | Very high speed (tpd 5-10ns) |
| Operating temperature range (°C) | 0 to 70 |
| Rating | Catalog |
| SOIC (DW) | 24 | 159.65 mm² 15.5 x 10.3 |
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