SN74CB3Q16811 Datasheet, PDF (1/12 Pages) Texas Instruments – 24-BIT SWITCH WITH PRECHARGED OUTPUTS 2.5-V/3.3-V LOW-VOLTAGE FET BUS SWITCH

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SN74CB3Q16811
24-BIT SWITCH WITH PRECHARGED OUTPUTS
2.5-V/3.3-V LOW-VOLTAGE FET BUS SWITCH
SCDS153B – OCTOBER 2003 – REVISED MARCH 2005
FEATURES
• Member of the Texas Instruments Widebus™
Family
• SN74CB3Q Bus Switches Are Equivalent to
IDTQS3VH Bus Switches
• 5-V Tolerant I/Os With Device Powered Up or
Powered Down
• Low and Flat ON-State Resistance (r_on)
Characteristics Over Operating Range
(r_on = 5 Ω Typ)
• Rail-to-Rail Switching on Data I/O Ports
– 0- to 5-V Switching With 3.3-V V_CC
– 0- to 3.3-V Switching With 2.5-V V_CC
• B-Port Outputs Are Precharged by Bias
Voltage (BIASV) to Minimize Signal Distortion
During Live Insertion and Hot Plugging
• Supports PCI Hot Plug
• Bidirectional Data Flow With Near-Zero
Propagation Delay
• Low Input/Output Capacitance Minimizes
Loading and Signal Distortion
(C_io(OFF) = 4 pF Typ)
• Fast Switching Frequency (f_ON = 20 MHz Max)
• Data and Control Inputs Provide Undershoot
Clamp Diodes
• Low Power Consumption (I_CC = 0.75 mA Typ)
• V_CC Operating Range From 2.3 V to 3.6 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
• I_off Supports Partial-Power-Down Mode
Operation
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
• 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: PCI Hot Plug, Hot Docking,
Memory Interleaving, Bus Isolation, and
Low-Distortion Signal Gating
DESCRIPTION/ORDERING INFORMATION
The SN74CB3Q16811 is a high-bandwidth FET bus switch utilizing a charge pump to elevate the gate voltage of
the pass transistor, providing a low and flat ON-state resistance (r_on). The low and flat ON-state resistance allows
for minimal propagation delay and supports rail-to-rail switching on the data input/output (I/O) ports. The device
also features low data I/O capacitance to minimize capacitive loading and signal distortion on the data bus.
Specifically designed to support high-bandwidth applications, the SN74CB3Q16811 provides an optimized
interface solution ideally suited for broadband communications, networking, and data-intensive computing
systems.
T_A
–40°C to 85°C
ORDERING INFORMATION
PACKAGE ⁽¹⁾
ORDERABLE PART NUMBER
SSOP – DL
Tube
Tape and reel
SN74CB3Q16811DL
SN74CB3Q16811DLR
TSSOP – DGG
Tape and reel
SN74CB3Q16811DGGR
TVSOP – DGV
Tape and reel
SN74CB3Q16811DGVR
TOP-SIDE MARKING
CB3Q16811
CB3Q16811
BW811
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
DESCRIPTION/ORDERING INFORMATION (CONTINUED)
The SN74CB3Q16811 is organized as two 12-bit bus switches with separate output-enable (1OE, 2OE) inputs. It
can be used as two 12-bit bus switches or as one 24-bit bus switch. When OE is low, the associated 12-bit bus
switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE
is high, the associated 12-bit bus switch is OFF, and a high-impedance state exists between the A and B ports.
The B port is precharged to bias voltage (BIASV) through the equivalent of a 10-kΩ resistor when OE is high or if
the device is powered down (V_CC = 0 V).
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Widebus is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2005, Texas Instruments Incorporated