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参数资料
型号： MAX245
厂商： Maxim Integrated Products, Inc.
元件分类： RS-232
英文描述： 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors
中文描述： 5V的高速RS - 232收发器与0.1uF电容
文件页数： 3/36页
文件大小： 442K
代理商： MAX245
M
+5V-Powered, Multichannel RS-232
Drivers/Receivers
_______________________________________________________________________________________
3
Note 3:
MAX243 R2
OUT
is guaranteed to be low when R2
IN
is
≥
0V or is floating.
ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)
(V
CC
= +5V ±10%, C1–C4 = 0.1μF MAX220, C1 = 0.047μF, C2–C4 = 0.33μF, T
A
= T
MIN
to T
MAX
unless otherwise noted.)
CONDITIONS
PARAMETER
Operating Supply Voltage
SHDN
Threshold High
4.5
5.5
2
10
V
MAX222/242
C
L
= 50pF to 2500pF,
R
L
= 3k
to 7k
,
V
CC
= 5V, T
A
= +25°C,
measured from +3V
to -3V or -3V to +3V
Transmitter-Output Enable Time
(
SHDN
goes high), Figure 4
2.0
1.4
V
MAX220
MAX222/232A/233A/242/243
MAX220
MAX222/232A/233A/242/243
T
A
= +25°C
T
A
= 0°C to +70°C
T
A
= -40°C to +85°C
T
A
= -55°C to +125°C
0.5
4
12
15
0.1
2
2
35
t
ET
No load
MAX222/232A/233A/242/243
6
12
30
V
CC
Supply Current (
SHDN
= V
CC
),
Figures 5, 6, 11, 19
3k
load
both inputs
mA
Transition Slew Rate
10
50
50
100
±1
0.8
MAX220
1.5
3
30
V/μs
MAX222/242, 0.1μF caps
(includes charge-pump start-up)
Shutdown Supply Current
MAX222/242
μA
SHDN
Input Leakage Current
SHDN
Threshold Low
MAX222/242
MAX222/242
μA
V
1.4
250
MAX222/232A/233A/242/243
MAX220
MAX222/232A/233A/242/243
MAX220
MAX222/232A/233A/242/243
MAX220
MAX222/232A/233A/242/243
MAX220
MAX242
MAX242
MAX242
MAX242
1.3
4
1.5
5
0.5
0.6
0.6
0.8
0.5
2.5
125
160
3.5
10
3.5
10
1
3
1
3
10
10
500
500
μs
t
PHLT
Transmitter-Output Disable Time
(
SHDN
goes low), Figure 4
t
DT
Transmitter Propagation Delay
TLL to RS-232 (normal operation),
Figure 1
t
PLHT
μs
V
2.0
1.4
MAX222/242, 0.1μF caps
μA
±0.05
±10
600
TTL/CMOS Output Leakage Current
EN
Input Threshold High
ns
t
PHLR
t
PLHR
Receiver Propagation Delay
RS-232 to TLL (normal operation),
Figure 2
t
PHLT
- t
PLHT
μs
MAX222/232A/233A/242/243
MAX220
MAX222/232A/233A/242/243
MAX220
t
PHLS
t
PLHS
Receiver Propagation Delay
RS-232 to TLL (shutdown), Figure 2
μs
Receiver-Output EnableTime, Figure 3 t
ER
Receiver-Output DisableTime, Figure 3 t
DR
UNITS
MIN
TYP
MAX
MAX242
ns
ns
SHDN
= V
CC
or
EN
= V
CC
(
SHDN
= 0V for MAX222),
0V
≤
V
OUT
≤
V
CC
MAX242
300
2000
100
225
ns
Transmitter + to - Propagation
Delay Difference (normal operation)
t
PHLR
- t
PLHR
ns
Receiver + to - Propagation
Delay Difference (normal operation)
V
1.4
0.8
EN
Input Threshold Low
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