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SN74CB3T3253DR Scheda tecnica(PDF) 1 Page - Texas Instruments

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Il numero della parte SN74CB3T3253DR
Spiegazioni elettronici  DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
Logo TI1 - Texas Instruments

SN74CB3T3253DR Scheda tecnica(HTML) 1 Page - Texas Instruments

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FEATURES
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16
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9
1OE
S1
1B4
1B3
1B2
1B1
1A
GND
VCC
2OE
S0
2B4
2B3
2B2
2B1
2A
D, DBQ, DGV, OR PW PACKAGE
(TOP VIEW)
DESCRIPTION/ORDERING INFORMATION
SN74CB3T3253
DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER
2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V TOLERANT LEVEL SHIFTER
SCDS148 – OCTOBER 2003 – REVISED JUNE 2005
Low Power Consumption (ICC = 20 µA Max)
Output Voltage Translation Tracks VCC
VCC Operating Range From 2.3 V to 3.6 V
Supports Mixed-Mode Signal Operation on All
Data I/Os Support 0- to 5-V Signaling Levels
Data I/O Ports
(0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V)
– 5-V Input Down to 3.3-V Output Level Shift
Control Inputs Can Be Driven by TTL or
With 3.3-V VCC
5-V/3.3-V CMOS Outputs
– 5-V/3.3-V Input Down to 2.5-V Output Level
Ioff Supports Partial-Power-Down Mode
Shift With 2.5-V VCC
Operation
5-V Tolerant I/Os With Device Powered Up or
Latch-Up Performance Exceeds 250 mA Per
Powered Down
JESD 17
Bidirectional Data Flow With Near-Zero
ESD Performance Tested Per JESD 22
Propagation Delay
– 2000-V Human-Body Model
Low ON-State Resistance (ron) Characteristics
(A114-B, Class II)
(ron = 5 Ω Typ)
– 1000-V Charged-Device Model (C101)
Low Input/Output Capacitance Minimizes
Supports Digital Applications: Level
Loading (Cio(OFF) = 5 pF Typ)
Translation, USB Interface, Memory
Data and Control Inputs Provide Undershoot
Interleaving, Bus Isolation
Clamp Diodes
Ideal for Low-Power Portable Equipment
The SN74CB3T3253 is a high-speed TTL-compatible FET multiplexer/demultiplexer with low ON-state resistance
(ron), allowing for minimal propagation delay. The device fully supports mixed-mode signal operation on all data
I/O ports by providing voltage translation that tracks VCC. The SN74CB3T3253 supports systems using 5-V TTL,
3.3-V LVTTL, and 2.5-V CMOS switching standards, as well as user-defined switching levels (see Figure 1).
The SN74CB3T3253 is organized as two 1-of-4 multiplexer/demultiplexers with separate output-enable (1OE,
2OE) inputs. The select (S0, S1) inputs control the data path of each multiplexer/demultiplexer. When OE is low,
the associated multiplexer/demultiplexer is ON, and the A port is connected to the B port, allowing bidirectional
data flow between ports. When OE is high, the associated multiplexer/demultiplexer 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 feature ensures that damaging
current will not 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.
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.
Copyright © 2003–2005, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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