1. A circuit comprising:
an IO pad;
a pull-down transistor device having a first protective transistor, the pull-down transistor device being configured for coupling to the IO pad;
a pull-up transistor device having a second protective transistor, the pull-up transistor device being configured for coupling to the IO pad;
means for biasing the first and second protective transistors using a plurality of supply voltages; and
means for biasing the first and second protective transistors using a voltage at the IO pad when one or more of the plurality of supply voltages are off.
2. The circuit of claim 1, further comprising:
a floating well on which the pull-up transistor device is fabricated; and
means for biasing the floating well when one or more of the plurality of supply voltages are off.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An ambidextrous thumb piece for a cylinder release mechanism of a firearm having a frame with a rear surface, sides that abut the rear surface and grooves disposed along each side, the ambidextrous thumb piece comprising:
an elastically deformable U-shaped body having ends and opposing ridges that extend from the ends;
wherein the ambidextrous thumb piece snap fits to the frame by engaging the grooves with the opposing ridges of the ambidextrous thumb piece; and
whereby reciprocation of the ambidextrous thumb piece on the frame causes the ambidextrous thumb piece to actuate the cylinder release mechanism.
2. The ambidextrous thumb piece of claim 1,
wherein the at least one of the opposing ridges of the ambidextrous thumb piece defines a carve out; and
wherein the at least one of the opposing ridges engages the cylinder release mechanism along the carve out.
3. The ambidextrous thumb piece of claim 1,
wherein the ambidextrous thumb piece is substantially flush with the rear surface of the frame.
4. The ambidextrous thumb piece of claim 1,
wherein the ambidextrous thumb piece has contours or texturing.
5. The ambidextrous thumb piece of claim 1,
wherein the ambidextrous thumb piece extends laterally across the rear surface of the frame when snap-fit to the frame.