LTC4307CMS8-1#PBF Linear Technology, LTC4307CMS8-1#PBF Datasheet

IC BUFFER 2-WIRE BUS 8-MSOP

LTC4307CMS8-1#PBF

Manufacturer Part Number
LTC4307CMS8-1#PBF
Description
IC BUFFER 2-WIRE BUS 8-MSOP
Manufacturer
Linear Technology
Type
Hot-Swap Switchr
Datasheet

Specifications of LTC4307CMS8-1#PBF

Applications
General Purpose, Buffer/Bus Extender
Internal Switch(s)
Yes
Voltage - Supply
2.3 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC4307CMS8-1#PBFLTC4307CMS8-1
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC4307CMS8-1#PBFLTC4307CMS8-1
Manufacturer:
LTNEAR
Quantity:
20 000
APPLICATIO S
FEATURES
TYPICAL APPLICATIO
Bidirectional Buffer for Display Data Channel (DDC)
Compliant with HDMI Specifi cation Version 1.3
DDC Capacitance Requirement
Level Translation Between 3.3V and 5V
±5kV Human Body Model ESD Protection
60mV Buffer Offset Independent of Load
Compatible with Non-Compliant V
Isolates Input SDA and SCL Line from Output
Compatible with I
READY Open-Drain Output
High Impedance SDA, SCL Pins for V
Small 8-Lead (3mm × 3mm) DFN and 8-Lead MSOP
Packages
HDMI
3.3V/5V Level Translation
Capacitance Buffer/Bus Extender
HDMI TX
DVD PLAYER (SOURCE)
IC
DDC GROUND
1.8k
1.8k
5V
U
2
C
CABLE
TM
HDMI
, I
2
C Fast Mode and SMBus
<50pF
TV (SINK)
EEPROM
U
OL
CC
I
2
C Devices
= 0V
V
SDAIN
SCLIN
CC
LTC4307-1
GND
SDAOUT
SCLOUT
ENABLE
0.1μF
10k
μC
DESCRIPTIO
The LTC4307-1 is a 2-wire bus buffer that provides ca-
pacitance buffering between input and output. The HDMI
specifi cation requires that devices have less than 50pF of
input capacitance on their DDC bus lines. The LTC4307-1’s
capacitance buffering feature, in conjunction with its
sub-10pF data and clock input capacitance, allows HDMI
components to easily meet the 50pF requirement and
tolerate high capacitance on the internal bus.
The LTC4307-1 also provides level-shifting between 3.3V
and 5V systems to allow lower voltage HDMI transmitters,
receivers and EEPROM to interface to the 5V DDC bus.
READY is an open-drain digital output fl ag that indicates
whether or not the input and output busses are connected
and can interface to the HDMI hot plug detect (HPD) signal.
When driven high, the ENABLE digital input allows the
LTC4307-1 to connect after a stop bit or bus idle. Driving
ENABLE low breaks the connection between the input and
output busses.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 7032051, 6356140, 6650174
High Defi nition Multimedia
10k
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
3.3V
HDMI RX
Shifting 2-Wire Bus Buffer
Interface (HDMI) Level-
IC
43071 TA01a
U
1000
800
600
400
200
0
0
OFFSET
Rising Edge from Asserted Low
LOW
100
SDAOUT
SDAIN
200
LTC4307-1
100ns/DIV
300
400
500
43071 TA01b
43071fa
1
600

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LTC4307CMS8-1#PBF Summary of contents

Page 1

... LTC4307-1 to connect after a stop bit or bus idle. Driving ENABLE low breaks the connection between the input and output busses. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 7032051, 6356140, 6650174 3.3V 0.1μ ...

Page 2

... LEAD FREE FINISH TAPE AND REEL LTC4307CDD-1#PBF LTC4307CDD-1#TRPBF LTC4307IDD-1#PBF LTC4307IDD-1#TRPBF LTC4307CMS8-1#PBF LTC4307CMS8-1#TRPBF LTC4307IMS8-1#PBF LTC4307IMS8-1#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. For more information on lead free part marking, go to: For more information on tape and reel specifi ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T SYMBOL PARAMETER V ENABLE Threshold THR_ENABLE I ENABLE Input Current ENABLE t ENABLE Delay Off-On PLH_EN t ENABLE Delay On-Off PHL_EN t READY Delay Off-On PLH_READY t READY Delay On-Off ...

Page 4

LTC4307-1 TIMING DIAGRAMS ENABLE CONNECT READY Rising and Falling Propagation Delay and Rise and Fall Times for SDAIN, SDAOUT and SCLIN, SCLOUT SDAIN/SCLIN SDAOUT/SCLOUT 4 ENABLE, CONNECT, READY Timing t PLH_READY t t PLH_EN PHL_EN PLH PHL ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS I vs Temperature CC 8 5.5V CC 8.0 7.7 7 3.3V CC 7.1 6 2.3V CC 6.5 6.2 5.9 –50 – 100 25 TEMPERATURE ...

Page 6

LTC4307 CTIO S ENABLE (Pin 1): Connection Enable Input. This is a 1.4V digital threshold input pin. For normal operation pull or tie ENABLE high. Driving ENABLE below 0.8V isolates SDAIN from SDAOUT, SCLIN from ...

Page 7

W BLOCK DIAGRA SDAIN 6 SLEW RATE DETECTOR SCLIN 3 SLEW RATE DETECTOR + – 0.55V CC + – 0.55V CC ENABLE + 1 – 1.4V Low Offset Level-Shifting 2-Wire Bus Buffer CONNECT CONNECT CONNECT CONNECT LOGIC 95μs DELAY UVLO ...

Page 8

LTC4307-1 OPERATION Start-Up When the LTC4307-1 fi rst receives power on its V during power-up, it starts in an undervoltage lockout (UVLO) state, ignoring any activity on the SDA or SCL pins until V rises above 2V (typ). This is ...

Page 9

OPERATION capacitance from 50pF to 150pF results from 81ns to 91ns. Larger output capacitances translate to longer delays (up to 125ns). Users must quantify the difference in propagation times for a rising edge versus a falling edge ...

Page 10

LTC4307-1 APPLICATIONS INFORMATION Figure 4 shows the LTC4307-1 being used for capacitance buffering and 5V to 3.3V level shifting. In this application, the EEPROM is powered by a backup 3.3V supply that is available when the component is turned off. ...

Page 11

... LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 12

... Recovery LTC4305/LTC4306 2-/4-Channel, 2-Wire Bus Multiplexers with Capacitance Buffering LTC4307 Low Offset Hot-Swappable 2-Wire Bus Buffer with Stuck Bus Recovery ThinSOT is a trademark of Linear Technology Corporation Linear Technology Corporation 12 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● On Both the Transmit and Receive Channels ...

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