VCCQ SH7622 C (164) TxD0 (171) RxD0 (32) PTA0 (3" />
參數(shù)資料
型號(hào): DS1482S+
廠商: Maxim Integrated Products
文件頁(yè)數(shù): 3/7頁(yè)
文件大?。?/td> 0K
描述: IC LEVEL SHIFT 1-WIRE 16-SOIC
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 50
類型: 線路驅(qū)動(dòng)器,發(fā)射器
驅(qū)動(dòng)器/接收器數(shù): 1/1
電源電壓: 4.5 V ~ 5.5 V
安裝類型: 表面貼裝
封裝/外殼: 16-SOIC(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 16-SOIC W
包裝: 管件
DS1482
3 of 7
Figure 2. Typical Operating Circuit
(21)
VCCQ
SH7622
C
(164)
TxD0
(171)
RxD0
(32)
PTA0
(31)
PTA1
(178)
IRQ7
VCC
PCTLZ
VCCQ
DS1482
TXD
I/O
RXD
SPU
START
DONE
GND
IRLMS6702
RS
VCC = 5V
1-Wire
NETWORK
VCCQ = 3.3V
Selecting RS
Assuming that the series resistance of the FET in
on-condition can be neglected, the value of RS is
limited as follows:
RSmax = 0.0015 x VCCmin/I(standby,max)
RSmin = 0.01 x VCCmax/I(active,min)
Example:
VCCmin = 4.5V, VCCmax = 5.5V
I(standby,max) = 0.15mA
I(active,min) = 12mA
RSmax = 45
Ω, RSmin = 4.58Ω
To maximize available power on the 1-Wire line,
RS should be close to the lowest permissible
value, in this example 5.1
Ω ±5%. The effect of the
on-chip pullup resistor is negligible.
Figure 3. DS1482 Application Signals, Normal Communication
TXD
SPU, START, DONE ALL LOW
I/O
RXD
H
L
H
L
H
L
Figure 4. DS1482 Application Signals, Strong Pullup Case
TXD
SPU
RXD
I/O
START
CURRENT
tCF
1
DONE
2
3
4
H
L
H
L
H
L
PCTLZ
H
L
H
L
H
L
H
L
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