LTC4300A-1IMS8 Linear Technology, LTC4300A-1IMS8 Datasheet - Page 5

• Manufacturer Part Number: LTC4300A-1IMS8
• Description: IC BUFFER BUS 2WR HOTSWAP 8-MSOP
• Manufacturer: Linear Technology
• Type: Hot-Swap Switchr

Specifications of LTC4300A-1IMS8

• Applications: General Purpose, Buffer/Bus Extender
• Internal Switch(s): Yes
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

PI FU CTIO S
ENABLE/V
age. For the LTC4300A-1, this is a digital CMOS threshold
input pin. Grounding this pin puts the part in a low current
(<1 A) mode. It also disables the rise-time accelerators,
disables the bus precharge circuitry, drives READY low,
isolates SDAIN from SDAOUT and isolates SCLIN from
SCLOUT. Drive ENABLE all the way to V
operation. Connect ENABLE to V
being used. For the LTC4300A-2, this is the supply voltage
for the devices on the card I
resistors from SDAOUT and SCLOUT to this pin. Place a
bypass capacitor of at least 0.01 F 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): Ground. Connect this pin to a ground plane
for best results.
U
CC2
U
(Pin 1): Chip Enable Pin/Card Supply Volt-
U
2
C busses. Connect pull-up
CC
if this feature is not
CC
for normal
READY/ACC (Pin 5): Connection Flag/Rise-Time Accel-
erator Control. For the LTC4300A-1, this is an open-drain
NMOS output which pulls low when either ENABLE is low
or the start-up sequence described in the Operation sec-
tion has not been completed. READY goes high when
ENABLE is high and start-up is complete. Connect a 10k
resistor from this pin to V
LTC4300A-2, this is a CMOS threshold digital input pin
that enables and disables the rise-time accelerators on all
four SDA and SCL pins. Drive ACC all the way to the V
supply voltage to enable all four accelerators; drive ACC to
ground to turn them off.
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
This is the supply voltage for the devices on the backplane
I
SCLIN (and also from SDAOUT and SCLOUT for the
LTC4300A-1) to this pin. Place a bypass capacitor of at
least 0.01 F close to this pin for best results.
2
CC
C busses. Connect pull-up resistors from SDAIN and
(Pin 8): Main Input Power Supply from Backplane.
LTC4300A-1/LTC4300A-2
CC
to provide the pull up. For the
sn4300a12 4300a12fs
5
CC2