feature

Typical 3Ω switch resistance at 5.0V VCC, VIN = 0V

Level shifting facilitates 5V to 3.3V interface

Minimum propagation delay through the switch

Turn off high-impedance input/output power

Zero bounce in overcurrent mode

TTL compatible active low control input

Control input allows overvoltage

illustrate

The FSTD3306 is a 2-bit ultra-high-speed CMOS FET with enhanced level shifting circuitry and a TTL compatible active low control input. The low tide switch resistance allows the input to be connected with minimal propagation delay and no additional ground bounce noise. The device is a 2-position switch with independent bus enable (BE) control. When BE is low, the switch is open and port A is connected to port B. When BE is high, the switch is open and a high impedance state exists between the two ports. The buck drive to the gate of the FET switch allows a nominal level shift from 5 volts to 3 volts across the switch. The control input allows voltages up to 5.5V, independent of VCC.

Connection Diagram

Absolute Maximum Ratings

"Absolute Maximum Ratings" are values at which the safety of the device cannot be guaranteed. This device should not operate within these limitations. Parameter values defined in the Electrical Characteristics table are not guaranteed to be at absolute maximum ratings. The "Recommended Operating Conditions" table defines the conditions under which the equipment will actually operate.

notes:

1. If the current ratings of the input and output diodes are observed.

Recommended Operating Conditions (2)

notes:

2. Unused logic inputs must be held high or low. They may not float.

DC characteristics

Unless otherwise specified, ambient temperature (TA) is -40°C to +85°.

notes:

3. Typical DC characteristics are shown in Figure 7-9.

4. Measure the voltage drop between the A and B pins with the current indicated by the switch. The resistance is determined by the lower voltage on the two (A or B) pins.

5. Add each TTL drive input (VIN=3.4V, control input only). A and B pins have no effect on ICC.

AC Electrical Characteristics

Unless otherwise specified, ambient temperature (TA) is -40°C to +85°C, CL=50pF, RU=RD=500Ω.

notes:

6. This parameter is guaranteed. Typical on-resistance of the switch and 50pF load capacitance output impedance, except when driven by an ideal voltage source (zero). On this basis the specified limits are calculated

AC loads and waveforms

AC test circuit. Inputs driven by a 50Ω supply are terminated within 50Ω.

CL includes the load and stray capacitance. Enter PRR = 1.0 MHz; TW = 500 ns.

Tape and Reel Specifications

Tape Format MicroPak