SN74CBT3305C

www.ti.com SN74CBT3305C DUAL FET BUS SWITCH 5-V BUS SWITCH WITH –2-V UNDERSHOOT PROTECTION SCDS125B – SEPTEMBER 2003 – REVISED AUGUST 2005 FEATURES 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 Ω Typ) Low Input/Output Capacitance Minimizes Loading and Signal Distortion (Cio(OFF) = 5 pF Typ) Data and Control Inputs Provide Undershoot Clamp Diodes Low Power Consumption (ICC = 3 µA Max) VCC 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, ClassII 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: USB Interface, Bus Isolation, Low-Distortion Signal Gating xxx xxx D, DGK, OR PW PACKAGE (TOP VIEW) 1OE 1 1A 2 1B 3 GND 4 8 VCC 7 2OE 6 2B 5 2A DESCRIPTION/ORDERING INFORMATION The SN74CBT3305C is a high-speed TTL-compatible FET bus switch with low ON-state resistance (ron), allowing for minimal propagation delay. Active undershoot-protection circuitry on the A and B ports of the device provides protection for undershoot up to –2 V by sensing an undershoot event and ensuring tha...