參數(shù)資料
型號: LTC4300A-2IMS8#TRPBF
廠商: Linear Technology
文件頁數(shù): 10/16頁
文件大?。?/td> 182K
描述: IC BUFFER BUS 2WR HOTSWAP 8-MSOP
產(chǎn)品培訓(xùn)模塊: LTC4310 - Hot-Swappable I²C Isolators
標準包裝: 2,500
類型: 熱交換開關(guān)
應(yīng)用: 通用型緩沖器/總線擴展器
內(nèi)部開關(guān):
電源電壓: 2.7 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 8-TSSOP,8-MSOP(0.118",3.00mm 寬)
供應(yīng)商設(shè)備封裝: 8-MSOP
包裝: 帶卷 (TR)
LTC4300A-1/LTC4300A-2
10
4300a12fa
APPLICATIONS INFORMATION
Resistor Pull-Up Value Selection
The system pull-up resistors must be strong enough to
provide a positive slew rate of 1.25V/約 on the SDA and
SCL pins, in order to activate the boost pull-up currents
during rising edges. Choose maximum resistor value R
using the formula:
   R d (V
CC(MIN)
  0.6) (800,000) / C
where R is the pull-up resistor value in ohms, V
CC(MIN)
 
is the minimum V
CC
 voltage and C is the equivalent bus
capacitance in picofarads (pF).
In addition, regardless of the bus capacitance, always
choose R d 16k for V
CC
 = 5.5V maximum, R d 24k for
V
CC
?=?3.6V maximum. The start-up circuitry requires
logic high voltages on SDAOUT and SCLOUT to connect
the backplane to the card, and these pull-up values are
needed to overcome the precharge voltage.
Live Insertion and Capacitance Buffering Application
Figures 3 through 6 illustrate the usage of the LTC4300A
in applications that take advantage of both its hot swap
controlling and capacitance buffering features. In all of
Figure 3. Inserting Multiple I/O Cards into a Live Backplane Using the LTC4300A-1 in a CompactPCI System
R13
10k
R12
10k
R14
10k
I/O PERIPHERAL CARD N
ENABLE
SDAIN
SCLIN
U3
LTC4300A-1
V
CC
GND
CARDN_SCL
CARDN_SDA
SDAOUT
SCLOUT
READY
ENABLE
SDAIN
SCLIN
V
CC
GND
SDAOUT
SCLOUT
READY
ENABLE
CARD
ENABLE/DISABLE
SDAIN
SCLIN
V
CC
GND
SDAOUT
SCLOUT
READY
4300a12 F03
R9
10k
R8
10k
R10
10k
I/O PERIPHERAL CARD 2
U2
LTC4300A-1
CARD2_SCL
CARD2_SDA
R5
10k
R4
10k
R6
10k
I/O PERIPHERAL CARD 1
U1
LTC4300A-1
CARD_SCL
CARD_SDA
R1
10k
V
CC
R2
10k
BACKPLANE
BACKPLANE
CONNECTOR
SDA
BD_SEL
SCL
C1
0.01糉
R3
10k
R7
10k
R11
10k
C3
0.01糉
C5
0.01糉
POWER SUPPLY
HOT SWAP
POWER SUPPLY
HOT SWAP
POWER SUPPLY
HOT SWAP
CARD
ENABLE/DISABLE
CARD
ENABLE/DISABLE
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