FAIRCHILD FSTD16861 20-Bit Bus Switch with Level Shifting Data Manual

16861 20-B it B s S itch ith evel S iftin

May 2001 Revised June 2005

FSTD16861 20-Bit Bus Switch with Level Shifting General Description Features The Fairchild Switch FSTD16861 provides 20-bits of high- ■4: switch connection between two ports. speed CMOS TTL-compatible bus switching. The low On

■Minimal propagation delay through the switch.

Resistance of the switch allows inputs to be connected to

■Low l CC.

outputs without adding propagation delay or generating

additional ground bounce noise. A diode to VCC has been ■Zero bounce in flow-through mode. integrated into the circuit to allow for level shifting between ■Control inputs compatible with TTL level.

5V inputs and 3.3V outputs. ■Tru Translation¥ voltage translation from 5.0V inputs to

The device is organized as a 10-bit or 20-bit bus switch. 3.3V outputs

When OE1 is LOW, the switch is ON and Port 1A is con- ■Power-off high impedance inputs and outputs nected to Port 1B. When OE2 is LOW, Port 2A is connected

■Supports live insertion/withdrawal (Note 1)

to Port 2B. When OEX is HIGH, a high impedance state Note 1: To ensure the high-impedance state during power up or power

exists between the A and B Ports. down, OE should be tied to VCC through a pull-up resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.

Ordering Code: Order Number Package Number Package Description FSTD16861MTD MTD48 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Tru Translation¥ is trademark of Fairchild Semiconductor Corporation.

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