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SN74CB3T16211 데이터시트(PDF) 2 Page - Texas Instruments

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부품명 SN74CB3T16211
상세설명  24-BIT FET SWITCH 2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER
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제조업체  TI [Texas Instruments]
홈페이지  http://www.ti.com
Logo TI - Texas Instruments

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SN74CB3T16211
24BIT FET BUS SWITCH
2.5V/3.3V LOW VOLTAGE BUS SWITCH WITH 5V TOLERANT LEVEL SHIFTER
SCDS147B − OCTOBER 2003 − REVISED JANUARY 2005
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description/ordering information (continued)
VCC
≈VCC
5.5 V
0 V
NOTE A: If the input high-voltage (VIH) level is greater than or equal to VCC − 1 V and less than or equal to 5.5 V, the output high-voltage (VOH)
level is equal to approximately the VCC voltage level.
Input Voltages
Output Voltages
0 V
≈VCC − 1 V
≈VCC − 1 V
VCC
IN
OUT
CB3T
Figure 1. Typical DC Voltage-Translation Characteristics
The I/O port of this device has a pullup current source that maintains the output voltage at VCC when the device
is ON and the input is greater than or equal to VCC − 1. Because of the pullup current source, the output voltage
level may be less than VCC when the operating frequency is low and the I/O port is connected to a pulldown
resistor. In order to maintain the output voltage at VCC, a pullup resistor must be connected to VCC, instead of
a pulldown resistor to ground.
The SN74CB3T16211 is organized as two 12-bit bus switches with separate output-enable (1OE, 2OE) inputs.
It can be used as two 12-bit bus switches or as one 24-bit bus switch. When OE is low, the associated 12-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 12-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 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.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
SSOP − DL
Tube
SN74CB3T16211DL
CB3T16211
SSOP − DL
Tape and reel
SN74CB3T16211DLR
CB3T16211
TSSOP − DGG
Tube
SN74CB3T16211DGG
CB3T16211
−40
°C to 85°C
TSSOP − DGG
Tape and reel
SN74CB3T16211DGGR
CB3T16211
−40 C to 85 C
TVSOP − DGV
Tape and reel
SN74CB3T16211DGVR
KR211
VFBGA − ZQL
(PB-Free)
Tape and reel
SN74CB3T16211ZQLR
KR211
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.


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