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Details, datasheet, quote on part number:SN74CB3Q16244DGVR
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Datasheet text preview:
SN74CB3Q16244 16 BIT FET BUS SWITCH 2.5 V/3.3 V LOW VOLTAGE, HIGH BANDWIDTH BUS SWITCH
SCDS168 - MAY 2004
D High-Bandwidth Data Path
(Up To 500 MHz)
DGG, DGV, OR DL PACKAGE (TOP VIEW)
D 5-V Tolerant I/Os with Device Powered Up D D D D D D D D D D D D D
or Powered Down Low and Flat ON-State Resistance (ron) Characteristics Over Operating Range (ron = 5 Typical) Rail-to-Rail Switching on Data I/O Ports - 0-V to 5-V Switching With 3.3-V VCC - 0-V to 3.3-V Switching With 2.5-V VCC Bidirectional Data Flow, With Near-Zero Propagation Delay Low Input/Output Capacitance Minimizes Loading and Signal Distortion (Cio(OFF) = 4 pF Typical) Fast Switching Frequency (fOE = 20 MHz Max) Data and Control Inputs Provide Undershoot Clamp Diodes Low Power Consumption (ICC = 1 mA Typical) VCC 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 or 5-V/3.3-V CMOS Outputs Ioff 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 Interface, Differential Signal Interface, Memory Interleaving, Bus Isolation, Low-Distortion Signal Gating
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.
1OE 1B1 1B2 GND 1B3 1B4 VCC 2B1 2B2 GND 2B3 2B4 3B1 3B2 GND 3B3 3B4 VCC 4B1 4B2 GND 4B3 4B4 4OE
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
2OE 1A1 1A2 GND 1A3 1A4 VCC 2A1 2A2 GND 2A3 2A4 3A1 3A2 GND 3A3 3A4 VCC 4A1 4A2 GND 4A3 4A4 3OE
D
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.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright 2004, Texas Instruments Incorporated
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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SCDS168 - MAY 2004
SN74CB3Q16244 16 BIT FET BUS SWITCH 2.5 V/3.3 V LOW VOLTAGE, HIGH BANDWIDTH BUS SWITCH
description/ordering information
The SN74CB3Q16244 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 (ron). 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 SN74CB3Q16244 provides an optimized interface solution ideally suited for broadband communications, networking, and data-intensive computing systems. The SN74CB3Q16244 is organized as four 4-bit bus switches with separate output-enable (1OE, 2OE, 3OE, 4OE) inputs. It can be used as four 4-bit bus switches, two 8-bit bus switches, or one 16-bit bus switch. When OE is low, the associated 4-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 4-bit bus switch is OFF, and a high-impedance state exists between the A and B ports. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry prevents damaging current backflow through the device when it is powered down. The device has isolation during power off. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. ORDERING INFORMATION
TA PACKAGE Tube SSOP - DL -40°C to 85 C 85°C TSSOP - DGG Tape and reel Tube Tape and reel ORDERABLE PART NUMBER SN74CB3Q16244DL SN74CB3Q16244DLR SN74CB3Q16244DGG SN74CB3Q16244DGGR CB3Q16244 CB3Q16244 TOP-SIDE MARKING
TVSOP - DGV Tape and reel SN74CB3Q16244DGVR BW244 Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. FUNCTION TABLE (each 4-bit bus switch) INPUT OE L H INPUT/OUTPUT A B Z FUNCTION A port = B port Disconnect
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN74CB3Q16244 16 BIT FET BUS SWITCH 2.5 V/3.3 V LOW VOLTAGE, HIGH BANDWIDTH BUS SWITCH
SCDS168 - MAY 2004
logic diagram (positive logic)
47 1A1 SW 2 1B1 2A1 41 SW 8 2B1
43 1A4 SW
6 1B4 2A4
37 SW
12 2B4
1 1OE 2OE
48
36 3A1 SW
13 3B1 4A1
30 SW
19 4B1
32 3A4 SW
17 3B4 4A4
26 SW
23 4B4
25 3OE 4OE
24
simplified schematic, each FET switch (SW)
A VCC B
Charge Pump
EN EN is the internal enable signal applied to the switch.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
3
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