SN74CBT16214C

` Member of the Texas Instruments Widebus<sup>TM</sup> Family
` Undershoot Protection for Off-Isolation on A and B Ports Up To −2 V
` Bidirectional Data Flow, With Near-Zero Propagation Delay
` Low ON-State Resistance (ron) Characteristics (ron = 3 Typical)
` Low Input/Output Capacitance Minimizes Loading and Signal Distortion
(C<sub>io(OFF</sub>) = 5.5 pF Typical)
` Data and Control Inputs Provide Undershoot Clamp Diodes
` Low Power Consumption
(I<sub>CC</sub> = 3 A Max)
` V_CC Operating Range From 4 V to 5.5 V
` Data I/Os Support 0 to 5-V Signaling Levels (0.8-V, 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, 5-V)
` Control Inputs Can Be Driven by TTL or 5-V/3.3-V CMOS Outputs
` Ioff Supports Partial-Power-Down Mode Operation
` Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
` ESD Performance Tested Per JESD 22
− 2000-V Human-Body Model (A114-B, Class II)
− 1000-V Charged-Device Model (C101)
` Supports Both Digital and Analog Applications: PCI Interface, Bus Isolation, Low-Distortion Signal Gating

Supply voltage range, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Control input voltage range, V_IN (see Notes 1 and 2) . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Switch I/O voltage range, V_I/O (see Notes 1, 2, and 3) . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Control input clamp current, I_IK (V_IN < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −50 mA
I/O port clamp current, I_I/OK (V_I/O < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . −50 mA
ON-state switch current, I_I/O (see Note 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±128 mA
Continuous current through V_CC or GND terminals . . . . . . . . . . . . . . . . . . . . .. . . . . ±100 mA
Package thermal impedance, _JA (see Note 5): DGG package . . . . . . . . . . . . . .  . . . 64°C/W
                                              DL package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56°C/W
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . .  . −65°C to 150°C
† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES: 1. All voltages are with respect to ground unless otherwise specified.
2. The input and output voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
3. V_I and V_O are used to denote specific conditions for V_I/O.
4. I_I and I_O are used to denote specific conditions for I_I/O.
5. The package thermal impedance is calculated in accordance with JESD 51-7

The SN74CBT16214C is a high-speed TTL-compatible FET multiplexer/demultiplexer with low ON-state resistance (ron), allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and B ports of the SN74CBT16214C provides protection for undershoot up to −2 V by sensing an undershoot event and ensuring that the switch remains in the proper OFF state.

The SN74CBT16214C is a 12-bit 1-of-3 multiplexer/demultiplexer. The select (S0, S1, S2) inputs control the data path of each multiplexer/demultiplexer. When the multiplexer/demultiplexer is enabled, the A port is connected to the B port, allowing bidirectional data flow between ports. When the multiplexer/demultiplexer is disabled, a high-impedance state exists between the A and B ports.

This SN74CBT16214C is fully specified for partial-power-down applications using Ioff. The Ioff feature ensures that damaging current will not backflow through the device when it is powered down. The device has isolation during power off.

To ensure the high-impedance state during power up or power down, each select input should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.