SN74CBTLV16800

www.ti.com SN74CBTLV16800 LOW-VOLTAGE 20-BIT FET BUS SWITCH WITH PRECHARGED OUTPUTS SCDS045J – DECEMBER 1997 – REVISED MARCH 2005 FEATURES Member of the Texas Instruments Widebus™ Family 5-Ω Switch Connection Between Two Ports Rail-to-Rail Switching on Data I/O Ports Ioff Supports Partial-Power-Down Mode Operation B-Port Outputs Are Precharged by Bias Voltage to Minimize Signal Distortion During Live Insertion Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II ESD Protection Exceeds JESD 22 – 2000-V Human-Body Model (A114-A) – 200-V Machine Model (A115-A) DESCRIPTION/ORDERING INFORMATION The SN74CBTLV16800 provides 20 bits of high-speed bus switching. The low on-state resistance of the switch allows connections to be made with minimal propagation delay. The device also precharges the B port to a user-selectable bias voltage (BIASV) to minimize live-insertion noise. The device is organized as dual 10-bit bus switches with separate output-enable (OE) inputs. It can be used as two 10-bit bus switches or one 20-bit bus switch. When OE is low, the associated 10-bit bus switch is on, and port A is connected to port B. When OE is high, the switch is open, the high-impedance state exists between the two ports, and port B is precharged to BIASV through the equivalent of a 10-kΩ resistor. DGG, DGV, OR DL PACKAGE (TOP VIEW) BIASV 1 1A1 2 1A2 3 1A3 4 1A4 5 1A5 6 1A6 7 GND 8 1A7 9 1A8 10 1A9 11 1A10 12 2A1 13 2A2 14 VCC 15 2A3 16 GND 17 2A4 18 2A5 19 2A6 20 2A7 21...