LTC4311ISC6#PBF Linear Technology, LTC4311ISC6#PBF Datasheet

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LTC4311ISC6#PBF

Manufacturer Part Number
LTC4311ISC6#PBF
Description
Manufacturer
Linear Technology
Datasheet

Specifications of LTC4311ISC6#PBF

Lead Free Status / Rohs Status
Compliant

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Part Number:
LTC4311ISC6#PBFLTC4311ISC6
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Quantity:
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LTC4311ISC6#PBFLTC4311ISC6#TRPBF
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0
FEATURES
APPLICATIONS
TYPICAL APPLICATION
SCL
SDA
I
2
C
Improves I
Ensures Data Integrity with Multiple Devices on the
I
Wide Supply Voltage Range: 1.6V to 5.5V
Improves Low State Noise Margin
Up to 400kHz Operation
Auto Detect Low Power Standby Mode
Low (<5μA) Supply Current Shutdown
Does Not Load Bus When Disabled or Powered Down
Strong Slew Limited Pull-up Current
±8kV Human Body Model ESD Ruggedness
2mm × 2mm DFN and SC70 Packages
Notebook and Palmtop Computers
Portable Instruments
Battery Chargers
Industrial Controls
TV/Video Products
ACPI SMBus Interface
2
C Bus.
OUT
CLK
CLK
DEVICE 1
IN
V
2.5V
C1
0.01μF
CC
2
C Bus Rise Time Transition
V
ENABLE
GND
DATA
DATA
CC
OUT
IN
LTC4311
BUS1
BUS2
OUT
CLK
CLK
DEVICE N
IN
2.5V
V
CC
DATA
DATA
OUT
IN
10k
10k
4311 TA01a
DESCRIPTION
The LTC
enhance data transmission speed and reliability for bus
loading conditions well beyond the 400pF I
limit. The LTC4311 operates at supply voltages from 1.6V
to 5.5V and is also compatible with SMBus.
The LTC4311 allows multiple device connections or a lon-
ger, more capacitive interconnect, without compromising
slew rates or bus performance, by using two slew limited
pull-up currents.
During positive bus transitions, the LTC4311 provides slew
limited pull-up currents to quickly slew the I
lines to the bus pull-up voltage. During negative transitions
or steady DC levels, the currents are disabled to improve
negative slew rate, and improve low state noise margins.
An auto detect standby mode reduces supply current if
both SCL and SDA are high. When disabled, the LTC4311
goes into low (<5μA) current shutdown.
The LTC4311 is available in the 2mm × 2mm × 0.75mm
DFN, and SC70 packages.
other trademarks are the property of their respective owners. Protected by U.S. Patents
including 6356140 and 6650174.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All
Low Voltage I
®
1V/DIV
4311 is a dual I
Comparison of I
V
C
f
I
the LTC4311 vs Resistor Pull-Up
CC
LD
2
C
= 100kHz
= 5V
= 200pF
LTC4311
R
2
PULL-UP
1μs/DIV
C active pull-up designed to
2
C Waveforms for
Accelerator
= 15.8k
2
C/SMBus
LTC4311
4311 TA01b
2
C specifi cation
2
C or SMBus
4311fa
1

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LTC4311ISC6#PBF Summary of contents

Page 1

... The LTC4311 is available in the 2mm × 2mm × 0.75mm DFN, and SC70 packages. , 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 6356140 and 6650174. ...

Page 2

LTC4311 ABSOLUTE MAXIMUM RATINGS V to GND .................................................... – 0 BUS1, BUS2, ENABLE Inputs ......................... – 0 Operating Temperature LTC4311C ................................................ 0°C to 70°C LTC4311I..............................................– 40°C to 85°C PIN CONFIGURATION TOP VIEW ENABLE 1 NC ...

Page 3

ELECTRICAL CHARACTERISTICS • temperature range, otherwise specifi cations are at T SYMBOL PARAMETER V Positive Supply Voltage CC I Supply Current CC I Supply Current, Standby Mode CC_STANDBY I Supply Current, Disabled CC_DISABLED I Transient Boosted Pull-up Current PULLUPAC I ...

Page 4

LTC4311 TYPICAL PERFORMANCE CHARACTERISTICS Boost Pull-Up Current vs Temperature –40 – ...

Page 5

PIN FUNCTIONS BUS1: Active Pull-up for Bus. Connect to either clock line or data line for 2-wire bus. BUS2: Active Pull-up for Bus. Connect to either clock line or data line for 2-wire bus. ENABLE: Device Enable Input. This is ...

Page 6

LTC4311 OPERATION and SMBus Overview 2 The I C communication protocol employs open-drain pull-down drivers with resistive or current source pull- ups. This protocol allows multiple devices to drive and monitor the bus without bus contention. The ...

Page 7

APPLICATIONS INFORMATION Selecting the values of R and The typical confi guration for the data bus for a 2-wire bus is shown in Figure 1. The parameters R chosen carefully. A description of the process for choosing ...

Page 8

LTC4311 APPLICATIONS INFORMATION 2 For system with fi xed input levels and V = 3V. For I C systems with V IHMIN levels 0.3V and V ILMAX CC IHMIN C is the total ...

Page 9

APPLICATIONS INFORMATION This is the lowest resistor value that may be chosen and still meet V . Next calculate the largest value will satisfy SR, the minimum slew rate requirement. Us- ing V = 0.4V and SR ...

Page 10

LTC4311 APPLICATIONS INFORMATION = –13kΩ • 400pF • ⎧ 2.1V + 0.15V – 3.3V – 13kΩ • 2.5mA ⎨ In 0.9V – 3.3V – 13kΩ • 2.5mA ⎩ 0.515µs + 0.205µs = 0.72µs ...

Page 11

... DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 12

... Recovery LTC4305 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 ● ...

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