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LTC4300A-3IMS8#PBF

P1-P3P4-P6P7-P9P10-P12P13-P14
LTC4300A-3
4
4300a3fa
–25 0–50 25 50 75 100
TEMPERATURE (°C)
I
CC
(mA)
4300a3 G01
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
4.3
V
CC
= 5.5V
V
CC
= 2.7V
–50 –25 0 25 50 75 100
TEMPERATURE (°C)
t
PHL
(ns)
4300a3 G02
100
80
60
40
20
0
V
CC
= 2.7V
V
CC
= 3.3V
V
CC
= 5.5V
C
IN
= C
OUT
= 100pF
R
PULLUPIN
= R
PULLUPOUT
= 10k
R
PULLUP
(Ω)
0
10,000 20,000 30,000 40,000
V
OUT
– V
IN
(mV)
4300a3 G04
300
250
200
150
100
50
0
V
CC
= 3.3V
V
CC
= 5V
T
A
= 25°C
V
IN
= 0V
TEMPERATURE (°C)
–50
35
30
25
20
15
10
5
0
25 75
4300a3 G05
–25 0
50 100
I
SD
(µA)
V
CC
= 5.5V
V
CC
= 2.7V
–50 –25 0 25 50 75 100
TEMPERATURE (°C)
I
PULLUPAC
(mA)
4300a3 G03
12
10
8
6
4
2
0
V
CC
= 2.7V
V
CC
= 5V
V
CC
= 3V
Typical perForMance characTerisTics
Connection Circuitry V
OUT
– V
IN
I
SD
vs Temperature
I
CC
vs Temperature
Input–Output High to Low
Propagation Delay vs Temperature I
PULLUPAC
vs Temperature
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: I
PULLUPAC
varies with temperature and V
CC
voltage, as shown in
the Typical Performance Characteristics section.
Note 3: The connection circuitry always regulates its output to a higher
voltage than its input. The magnitude of this offset voltage as a function of
the pull-up resistor and V
CC
voltage is shown in the Typical Performance
Characteristics section.
Note 4: Guaranteed by design, not subject to test.
Note 5: C
B
= total capacitance of one bus line in pF.
Note 6: These tests measure the difference in high-to-low propagation
delay t
PHL
between the clock and data channels. The delay on each
channel is measured from the 50% point of the falling driven input signal
to the 50% point of the output driven by the LTC4300A-3.The skew is
defined as (t
PHL(SCL)
-t
PHL(SDA)
). Testing is performed in both directions—
from input bus to output bus and vice versa. Tests are performed with
approximately 500pF of distributed equivalent capacitance on each SDA
and SCL pin.
elecTrical characTerisTics
LTC4300A-3
5
4300a3fa
pin FuncTions
V
CC2
(Pin 1): Card Supply Voltage. This is the supply
voltage for the devices on the card I
2
C busses. Connect
pull-up resistors from SDAOUT and SCLOUT to this pin.
Place a bypass capacitor of at least 0.01µF close to this
pin for best results.
SCLOUT (Pin 2): Serial Clock Output. Connect this pin to
the SCL bus on the card.
SCLIN (Pin 3): Serial Clock Input. Connect this pin to the
SCL bus on the backplane.
GND (Pin 4): Device Ground. Connect this pin to a ground
plane for best results.
ENABLE (Pin 5):
Digital CMOS Threshold Input. Ground-
ing this pin puts the part in a low current mode. It also
disables the rise time accelerators, disables the bus
discharge circuitry, isolates SDAIN from SDOUT and
isolates SCLIN from SCLOUT. For active operation, drive
this pin to V
CC
. If this feature is unused, tie to V
CC
. Since
ENABLE is V
CC
referenced, do not connect to V
CC2
or
pull up to V
CC2
.
SDAIN (Pin 6): Serial Data Input. Connect this pin to the
SDA bus on the backplane.
SDAOUT (Pin 7): Serial Data Output. Connect this pin to
the SDA bus on the card.
V
CC
(Pin 8): Main Input Power Supply from Backplane.
This is the supply voltage for the devices on the backplane
I
2
C busses. Connect pull-up resistors from SDAIN and
SCLIN to this pin. Place a bypass capacitor of at least
0.01µF close to this pin for best results.
Exposed Pad (Pin 9, DFN Package Only): Exposed pad
may by be left open or connected to device ground.
(DFN/MSOP)
LTC4300A-3
6
4300a3fa
block DiagraM
100k
100k
–
+
–
+
0.5pF
3SCLIN
ENABLE
UVLO
4300a3 BD
CONNECT CONNECT
STOP BIT AND BUS IDLE
4
4
GND
20pF
RD
S
QB
0.5A
0.55V
CC
/
0.45V
CC
–
+
–
+
V
CC2
– 1V
2mA
BACKPLANE-TO-CARD
CONNECTION
CONNECTCONNECT
2 SCLOUT
6SDAIN
8V
CC
BACKPLANE-TO-CARD
CONNECTION
CONNECT
CONNECT
7 SDAOUT
1 V
CC2
1V
PRECHARGE
100k 100k
CONNECT
SLEW RATE
DETECTOR
2mA
SLEW RATE
DETECTOR
2mA
SLEW RATE
DETECTOR
2mA
SLEW RATE
DETECTOR
95µs
DELAY,
RISING
ONLY
5
2-Wire Bus Buffer and Hot Swap™
Controller
P1-P3P4-P6P7-P9P10-P12P13-P14

LTC4300A-3IMS8#PBF

Mfr. #:
Buy LTC4300A-3IMS8#PBF
Manufacturer:
Analog Devices Inc.
Description:
Interface - Signal Buffers, Repeaters 2-Wire Bus Buffer
Lifecycle:
New from this manufacturer.
Delivery:
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