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参数资料
型号： LTC1321IN#PBF
厂商： Linear Technology
文件页数： 15/20页
文件大小： 0K
描述： IC TXRX RS232/RS485/EIA562 24DIP
标准包装： 15
类型： 收发器
驱动器/接收器数： 4/4
规程： RS562
电源电压： 4.75 V ~ 5.25 V
安装类型： 通孔
封装/外壳： 24-DIP（0.300"，7.62mm）
供应商设备封装： 24-PDIP
包装： 管件
4
LTC1321/LTC1322/LTC1335
DC ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Currents
ICC
VCC Supply Current
No Load (SEL1 = SEL2 = HIGH)
q
1000
2000
A
Shutdown, ON/OFF = 0V
q
15
50
A
IDD
VDD Supply Current (LTC1321/LTC1322)
No Load (SEL1 = SEL2 = LOW)
q
300
1000
A
Shutdown, ON/OFF = 0V
q
0.1
50
A
IEE
VEE Supply Current
No Load (SEL1 = SEL2 = HIGH)
q
– 1000
– 2000
A
Shutdown, ON/OFF = 0V
q
– 0.1
– 50
A
DC ELECTRICAL CHARACTERISTICS
VCC = VDD (LTC1321/LTC1322) = 5V ±5%, VEE = – 5V ±5% (Notes 2, 3)
AC
VCC = VDD (LTC1321/LTC1322) = 5V ±5%, VEE = – 5V ±5% (Notes 2, 3)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
EIA/TIA-562 Mode (SEL1 = SEL2 = LOW)
SR
Slew Rate
Figure 4, RL = 3k, CL = 15pF
q
14
30
V/
s
Figure 4, RL = 3k, CL = 1000pF
q
47
V/
s
tT
Transition Time
Figure 4, RL = 3k, CL = 2500pF
q
0.22
1.9
3.1
s
tPLH
Driver Input to Output
Figures 4,10, RL = 3k, CL = 15pF
q
0.6
4
s
tPHL
Driver Input to Output
Figures 4,10, RL = 3k, CL = 15pF
q
0.6
4
s
tPLH
Receiver Input to Output
Figures 5,11
q
0.3
6
s
tPHL
Receiver Input to Output
Figures 5,11
q
0.4
6
s
RS485 Mode (SEL1 = SEL2 = HIGH)
tPLH
Driver Input to Output
Figures 2,7, RL = 54, CL = 100pF
q
20
40
70
ns
tPHL
Driver Input to Output
Figures 2,7, RL = 54, CL = 100pF
q
20
40
70
ns
tSKEW
Driver Output to Output
Figures 2,7, RL = 54, CL = 100pF
q
515
ns
tr, tf
Driver Rise or Fall Time
Figures 2,7, RL = 54, CL = 100pF
q
315
40
ns
tZL
Driver Enable to Output Low
Figures 3,8, CL = 100pF, S1 Closed
q
50
90
ns
tZH
Driver Enable to Output High
Figures 3,8, CL = 100pF, S2 Closed
q
50
90
ns
tLZ
Driver Disable from Low
Figures 3,8, CL = 15pF, S1 Closed
q
50
90
ns
tHZ
Driver Disable from High
Figures 3,8, CL = 15pF, S2 Closed
q
60
90
ns
tPLH
Receiver Input to Output
Figures 2,9, RL = 54, CL = 100pF
q
20
60
140
ns
tPHL
Receiver Input to Output
Figures 2,9, RL = 54, CL = 100pF
q
20
70
140
ns
tSKEW
Differential Receiver Skew,
tPLH-tPHL
Figures 2,9, RL = 54, CL = 100pF
q
10
ns
Receiver Output Enable/Disable (LTC1335)
tZL
Receiver Enable to Output Low
Figures 6,12, CL = 15pF, S1 Closed
q
40
90
ns
tZH
Receiver Enable to Output High
Figures 6,12, CL = 15pF, S2 Closed
q
40
90
ns
tLZ
Receiver Disable from Low
Figures 6,12, CL = 15pF, S1 Closed
q
40
90
ns
tHZ
Receiver Disable from High
Figures 6,12, CL = 15pF, S2 Closed
q
50
90
ns
The q denotes specifications which apply over the full operating
temperature range.
Note 1: Absolute maximum ratings are those values beyond which the
safety of the device cannot be guaranteed.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to device ground unless
otherwise specified.
Note 3: All typicals are given at VCC = VDD (LTC1321/LTC1322) = 5V,
VEE = – 5V, and TA = 25°C.
Note 4: Short-circuit current for RS485 driver output low state folds back
above VCC. Peak current occurs around VO = 3V.
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