SN74CB3Q32245 Datasheet, PDF (1/10 Pages) Texas Instruments – 32 bit BUS SWITCH 2.5-V/3.3-V HIGH BANDWIDTH

D Member of the Texas Instruments
Widebus+ Family
D High-Bandwidth Data Path
(Up to 500 MHz^†)
D 5-V-Tolerant I/Os with Device Powered Up
or Powered Down
D Low and Flat ON-State Resistance (r_on)
Characteristics Over Operating Range
(r_on = 5 Ω Typical)
D 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
D Bidirectional Data Flow, With Near-Zero
Propagation Delay
D Low Input/Output Capacitance Minimizes
Loading and Signal Distortion
(C_io(OFF) = 4 pF Typical)
D Fast Switching Frequency
(f_OE = 20 MHz Max)
† _{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.
SN74CB3Q32245
32ĆBIT BUS SWITCH
2.5ĆV/3.3ĆV HIGH BANDWIDTH
SCES622 – JANUARY 2005
D Data and Control Inputs Provide
Undershoot Clamp Diodes
D Low Power Consumption
(I_CC = 2 mA Typical)
D V_CC Operating Range From 2.3 V to 3.6 V
D 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)
D Control Inputs Can be Driven by TTL or
5-V/3.3-V CMOS Outputs
D I_off Supports Partial-Power-Down Mode
Operation
D Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
D ESD Performance Tested Per JESD 22
− 2000-V Human-Body Model
(A114-B, Class II)
− 1000-V Charged-Device Model (C101)
D Supports Both Digital and Analog
Applications: PCI Interface, Differential
Signal Interface, Memory Interleaving, Bus
Isolation, Low-Distortion Signal Gating
description/ordering information
The SN74CB3Q32245 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 SN74CB3Q32245 provides an optimized
interface solution ideally suited for broadband communications, networking, and data-intensive computing
systems.
The SN74CB3Q32245 is organized as four 8-bit bus switches with separate output-enable (1OE, 2OE, 3OE,
4OE) inputs. It can be used as four 8-bit bus switches, two 16-bit bus switches, or as one 32-bit bus switch. When
OE is low, the associated 8-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 8-bit bus switch is OFF, and a high-impedance state
exists between the A and B ports.
ORDERING INFORMATION
TA
PACKAGE‡
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
LFBGA − GKE
−40°C to 85°C
LFBGA − ZKE (Pb-free)
Tape and reel
Tape and reel
SN74CB3Q32245GKER
SN74CB3Q32245ZKER
BZ245
‡ _{Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are}
available at www.ti.com/sc/package.
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 Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright  2005, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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