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LTC4305CGN#PBF

Description
IC BUFFER BUS 2WR ADDRESS 16SSOP
CategoryAnalog mixed-signal IC    The signal circuit   
File Size217KB,20 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric View All

LTC4305CGN#PBF Overview

IC BUFFER BUS 2WR ADDRESS 16SSOP

LTC4305CGN#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeSSOP
package instructionSSOP,
Contacts16
Manufacturer packaging codeGN
Reach Compliance Codecompliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSINGLE-ENDED MULTIPLEXER
JESD-30 codeR-PDSO-G16
JESD-609 codee3
length4.8895 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals16
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height1.75 mm
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)2.7 V
Nominal supply voltage (Vsup)3.3 V
surface mountYES
Temperature levelCOMMERCIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.635 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3.9 mm
LTC4305
2-Channel,
2-Wire Bus Multiplexer with
Capacitance Buffering
FEATURES
DESCRIPTIO
1:2 2-Wire Multiplexer/Switch
Connect SDA and SCL Lines with 2-Wire Bus
Commands
Supply Independent Bidirectional Buffer for SDA
and SCL Lines Increases Fan-Out
Programmable Disconnect from Stuck Bus
Compatible with I
2
C and SMBus Standards
Rise Time Accelerator Circuitry
SMBus Compatible ALERT Response Protocol
Prevents SDA and SCL Corruption During Live Board
Insertion and Removal from Backplane
±10kV
Human Body Model ESD Ruggedness
16-Lead (4mm
×
5mm) DFN and SSOP Packages
The LTC
®
4305 is a 2-channel, 2-wire bus multiplexer with
bus buffers to provide capacitive isolation between the
upstream bus and downstream buses. Through software
control, the LTC4305 connects the upstream 2-wire bus
to any desired combination of downstream channels.
Each channel can be pulled up to a supply voltage ranging
from 2.2V to 5.5V, independent of the LTC4305 supply
voltage. The downstream channels are also provided with
an ALERT1–ALERT2 inputs for fault reporting.
Programmable timeout circuitry disconnects the down-
stream buses if the bus is stuck low. When activated, rise
time accelerators source currents into the 2-wire bus pins
to reduce rise time. Driving the ENABLE pin low restores
all features to their default states. Three address pins
provide 27 distinct addresses.
The LTC4305 is available in 16-lead (4mm
×
5mm) DFN
and SSOP packages.
, LTC and LT are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Patent Pending.
APPLICATIO S
Nested Addressing
5V/3.3V Level Translator
Capacitance Buffer/Bus Extender
TYPICAL APPLICATIO
2.5V
3.3V
A Level-Shifting and Nested Addressing Application
I
2
C Bus Waveforms
0.01µF
10k
10k
10k
V
CC
SCLIN
MICRO-
CONTROLLER
SDAIN
ALERT
SCL1
SDA1
ALERT1
5V
LTC4305
ADR2
ADR1
ADR0
GND
SCL2
SDA2
ALERT2
4305 TA01
V
CC
= 3.3V
10k
10k
10k
SCLIN
2V/DIV
SFP
MODULE #1
ADDRESS = 1111 000
SCL1
2V/DIV
10k
10k
10k
SFP
MODULE #2
ADDRESS = 1111 000
SCL2
2V/DIV
500ns/DIV
ADDRESS = 1000 100
U
VBACK = 2.5V
VCARD1 = 3.3V
VCARD2 = 5V
4305 TA01b
U
U
4305f
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