View b5s16861 datasheet:

B5S16861 20-BIT TWO PORT BUS SWITCH PRELIMINARY DATA HIGH SPEED: tPD = 0.25ns (MAX.) at VCC =4.5VTA=85°C ON RESISTANCE BETWEEN TWO PORT: 5? (TYP) at VCC =5.0VTA=25°C LOW POWER DISSIPATION: ICC = 1uA(MAX.) at TA=25°C TSSOP COMPATIBLE WITH TTL OUTPUTS: VIH=2V(MIN), VIL=0.8V(MAX) POWER DOWN PROTECTION ON INPUTS AND OUTPUTS ORDER CODES OPERATING VOLTAGE RANGE: PACKAGE T & R VCC(OPR) = 4V to 5.5V TSSOP48 B5S16861TTR PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 16861 PIN CONNECTION IMPROVED LATCH-UP IMMUNITY ESD PERFORMANCE: HBM > 2000V (MIL STD 883 method 3015); MM > 200V DESCRIPTION The B5S16861 is an advanced high-speed CMOS 20-BIT TWO PORT BUS SWITCH fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS tecnology. It is ideal for 4V