text.skipToContent text.skipToNavigation


10-Bit FET Bus Switch With Precharged Outputs and Active-Clamp Undershoot Circuit


Package | PIN: DBQ | 24
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $2.06
10-24 $1.85
25-99 $1.72
100-249 $1.50
250-499 $1.38
500-749 $1.16
750-999 $0.95
1000+ $0.87


  • 5- Switch Connection Between Two Ports
  • TTL-Compatible Input Levels
  • Power Off Disables Outputs, Permitting Live Insertion
  • Outputs Are Precharged by Bias Voltage to Minimize Signal Distortion During Live Insertion
  • Active-Clamp Undershoot-Protection Circuit on the I/Os Clamps Undershoots Down to \x962 V
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)

Texas Instruments  SN74CBTK6800DBQR

The SN74CBTK6800 device provides ten bits of high-speed TTL-compatible bus switching. The low on-state resistance of the switch allows bidirectional connections to be made while adding near-zero propagation delay. The device also precharges the B port to a user-selectable bias voltage (BIASV) to minimize live-insertion noise.

The A and B ports have an active-clamp undershoot-protection circuit. When there is an undershoot, the active-clamp circuit is enabled and current from VCC is supplied to clamp the output, preventing the pass transistor from turning on.

The SN74CBTK6800 is organized as one 10-bit switch with a single enable (ON\) input. When ON\ is low, the switch is on, and port A is connected to port B. When ON\ is high, the switch between port A and port B is open. When ON\ is high or VCC is 0 V, B port is precharged to BIASV through the equivalent of a 10-k resistor.