These devices contain two independent J-K negative-edge-triggered
flip-flops. A low level at the preset () or clear () inputs sets or resets the
outputs, regardless of the levels of the other inputs. When and are inactive (high), data at the J
and K inputs meeting the setup-time requirements is transferred to
the outputs on the negative-going edge of the clock pulse (CLK).
Clock triggering occurs at a voltage level and is not directly
related to the fall time of the clock pulse. Following the hold-time
interval, data at the J and K inputs may be changed without affecting
the levels at the outputs. These versatile flip-flops can perform as
toggle flip-flops by tying J and K high.
The SN54ALS112A is characterized for operation over the full
military temperature range of -55°C to 125°C. The
SN74ALS112A is characterized for operation from 0°C to
70°C.
