SN74CB3Q3305_09 Datasheet, PDF (1/13 Pages) Texas Instruments – DUAL FET BUS SWITCH 2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH

SN74CB3Q3305
www.ti.com
SCDS141B – OCTOBER 2003 – REVISED OCTOBER 2009
DUAL FET BUS SWITCH
2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH
Check for Samples: SN74CB3Q3305
FEATURES
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• High-Bandwidth Data Path (up to 500 MHz)
For additional information regarding the performance
characteristics of the CB3Q family, refer to the TI application
report, CBT-C, CB3T, and CB3Q Signal-Switch Families, literature
number SCDA008.
• 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 = 3 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
• Bidirectional Data Flow With Near-Zero
Propagation Delay
• Low Input/Output Capacitance Minimizes
Loading and Signal Distortion
(C_io(OFF) = 3.5 pF Typ)
• Fast Switching Frequency (f_OE = 20 MHz Max)
• Data and Control Inputs Provide Undershoot
Clamp Diodes
• Low Power Consumption (I_CC = 0.25 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: USB Interface, Differential Signal
Interface, Bus Isolation, Low-Distortion Signal
Gating
PW PACKAGE
(TOP VIEW)
1OE 1
1A 2
1B ³
GND ⁴
8 V_CC
7 2OE
6 2B
5 2A
1OE
1A
1B
GND
DCU PACKAGE
(TOP VIEW)
1
8
2
7
3
6
4
5
V_CC
2OE
2B
2A
DESCRIPTION/ORDERING INFORMATION
The SN74CB3Q3305 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
SN74CB3Q3305 provides an optimized interface
solution ideally suited for broadband communications,
networking, and data-intensive computing systems.
The SN74CB3Q3305 is organized as two 1-bit
switches with separate output-enable (1OE, 2OE)
inputs. It can be used as two 1-bit bus switches or as
one 2-bit bus switch. When OE is high, the
associated 1-bit bus switch is ON and the A port is
connected to the B port, allowing bidirectional data
flow between ports. When OE is low, the associated
1-bit bus switch is OFF and a high-impedance state
exists between the A and B ports.
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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 © 2003–2009, Texas Instruments Incorporated