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參數(shù)資料
型號： SP3245EER1-L/TR
廠商： Exar Corporation
文件頁數(shù)： 18/22頁
文件大?。?/td> 0K
描述： IC TXRX RS235 32QFN
標準包裝： 3,000
類型： 收發(fā)器
驅(qū)動器/接收器數(shù)： 3/5
規(guī)程： RS232
電源電壓： 3 V ~ 5.5 V
安裝類型： 表面貼裝
封裝/外殼： 32-VFQFN 裸露焊盤
供應商設(shè)備封裝： 32-QFN 裸露焊盤（5x5）
包裝： 帶卷 (TR)
5
Exar Corporation 48720 Kato Road, Fremont CA, 94538 50-668-707 www.exar.com
SP3244E_SP3245E_00_2509
TImINg CHARACTERISTICS
Unless otherwise noted VCC = +3.0V to +5.5V, TAMB = TMIN to TMAX, C1–C4 = 0.1μF. Typical values are
at TAMB = +25°C, VCC = 3.3V.
PARAmETERS
SymbOL
TEST CONDITIONS
mIN.
TyP.
mAx.
UNIT
SP3244E
Maximum Data Rate
Rl = 3k, Cl = 000pF. One
transmitter switching.
250
kbps
Driver Propagation Delay
t
DPHL, tDPLH
C
L = 000pF
600
ns
Transition-Region Slew
Rate
Rl=3kΩ to 7kΩ, Cl=50pF
to 000pF, measurements
taken from +3V to -3V or
from -3V to +3V.
Ta = 25C
4
30
V/μs
Driver Skew
|tdphl - tdplh| at zero cross-
ing
50
ns
Receiver Propagation
Delay
trphl,trplh R
IN to ROUT, Cl = 50pF
0.5
s
Receiver Output Enable
Time
trzh , trzl
0.4
2.0
s
Receiver Output Disable
Time
trhz , trlz
0.
2.0
s
Receiver Skew
|trphl - trplh| at 1.5V
40
ns
PARAmETERS
SymbOL
TEST CONDITIONS
mIN.
TyP.
mAx.
UNIT
SP3245E
Maximum Data Rate
Rl = 3k, Cl = 250pF. One
transmitter switching.
000
kbps
Rl = 3k, Cl = 000pF. One
transmitter switching.
500
kbps
Driver Propagation Delay
t
DPHL, tDPLH
C
L = 250pF
700
ns
Transition-Region Slew
Rate
Rl=3kΩ to 7kΩ, Cl=50pF to
250pF, measurements taken
from +3V to -3V or from -3V
to +3V.
Ta = 25C
24
50
V/μs
Driver Skew
|tdhpl - tdplh| at zero
crossing
00
ns
Receiver Propagation
Delay
trphl,trplh R
IN to ROUT, Cl = 50pF
0.5
s
Receiver Output Enable
Time
trzh , trzl
0.05
2.0
s
Receiver Output Disable
Time
trzh , trlz
0.
2.0
s
Receiver Skew
|trphl - trplh| at 1.5V
90
ns
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