SN74CB3Q3125_15 Datasheet, PDF (1/26 Pages) Texas Instruments – Quadruple FET Bus Switch

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SN74CB3Q3125
SCDS143C – OCTOBER 2003 – REVISED JUNE 2015
SN74CB3Q3125 Quadruple FET Bus Switch
2.5-V/3.3-V Low-Voltage, High-Bandwidth Bus Switch
1 Features
•1 High-Bandwidth Data Path (up to 500 MHz⁽¹⁾)
• 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-V to 5-V Switching With 3.3-V V_CC
– 0-V to 3.3-V Switching With 2.5-V V_CC
• Bidirectional Data Flow With Near-Zero
Propagation Delay
• Low Input and Output Capacitance Minimizes
Loading and Signal Distortion
(C_io(OFF) = 4 pF Typ)
• Fast Switching Frequency (f_OE = 20 MHz Max)
• Data and Control Inputs Provide Undershoot
Clamp Diodes
• Low Power Consumption
(I_CC = 0.3 mA Typ)
• V_CC Operating Range From 2.3 V to 3.6 V
• Data I/Os Support 0-V 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,
5-V, or 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
(1) _{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
(SCDA008).
2 Applications
• IP Phones: Wired and Wireless
• Optical Modules
• Optical Networking: Video Over Fiber and EPON
• Private Branch Exchange (PBX)
• WiMAX and Wireless Infrastructure Equipment
3 Description
The SN74CB3Q3125 device is a high-bandwidth FET
bus switch that uses a charge pump to elevate the
gate voltage of the pass transistor, thus 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
SN74CB3Q3125 device also features low data I/O
capacitance to minimize capacitive loading and signal
distortion on the data bus.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
VQFN (14)
3.50 mm × 3.50 mm
SN74CB3Q3125
SSOP (16)
TSSOP (16)
4.90 mm × 3.90 mm
5.00 mm × 4.40 mm
TVSOP (16)
4.40 mm × 3.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Logic Diagram (Positive Logic)
2
1A
1
1OE
3
SW
1B
5
2A
4
2OE
6
SW
2B
9
3A
10
3OE
8
SW
3B
12
4A
SW
13
4OE
Pin numbers shown are for the DGV, PW,
and RGY packages.
11
4B
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.