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參數(shù)資料
| 型號： | MAX3238E |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 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收發(fā)器與0.1uF電容 |
| 文件頁數(shù)： | 10/14頁 |
| 文件大?。?/td> | 235K |
| 代理商： | MAX3238E |
M
10
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Therefore, the Machine Model is less relevant to the I/O
ports than the Human Body Model and IEC 1000-4-2.
Applications Information
Capacitor Selection
The capacitor type used for C1–C4 is not critical for
proper operation; polarized or nonpolarized capacitors
can be used. The charge pump requires 0.1μF capaci-
tors for 3.3V operation. For other supply voltages, see
Table 3 for required capacitor values. Do not use val-
ues smaller than those listed in Table 3. Increasing the
capacitor values (e.g., by a factor of 2) reduces ripple
on the transmitter outputs and slightly reduces power
consumption. C2, C3, and C4 can be increased without
changing C1’s value. However,
do not increase C1
without also increasing the values of C2, C3, C4,
and C
BYPASS
to maintain the proper ratios (C1 to the
other capacitors).
Power-Supply Decoupling
In most applications, decouple V
CC
to ground with a
0.1μF capacitor. Further increasing this capacitor value
reduces power-supply ripple and enhances noise mar-
gin. Connect the bypass capacitor as close to the IC as
possible.
CHARGE-CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
100pF
R
C
1M
R
D
1500
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
I
P
100%
90%
36.8%
t
RL
TIME
t
DL
CURRENT WAVEFORM
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
Ir
10%
0
0
AMPERES
Figure 5a. Human Body ESD Test Model
CHARGE-CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
150pF
R
C
50M
to 100M
R
D
330
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
Figure 6a. IEC 1000-4-2 ESD Test Model
Figure 5b. Human Body Model Current Waveform
100%
90%
60ns
10%
tr = 0.7ns to 1ns
I
P
I
30ns
t
Figure 6b. IEC 1000-4-2 ESD Generator Current Waveform
+3.0V to +5.5V, 10nA, 250kbps RS-232 Transceivers
with ±15kV ESD-Protected I/O and Logic Pins
V
CC
(V)
C2, C3, C4
(μF)
0.22
0.1
3.0 to 3.6
3.15 to 3.6
C1, C
BYPASS
(μF)
0.22
0.1
4.5 to 5.5
3.0 to 5.5
0.33
1
0.047
0.22
Table 3. Required Minimum Capacitance
Values
相關(guān)PDF資料 |
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| MAX3238ECAI | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| MAX3248E | ±15kV ESD-Protected, 3.0V to 5.5V, Low-Power, Up to 250kbps, True RS-232 Transceivers(±15kV ESD保護(hù)，3.0V至5.5V,低功耗,250kbps, RS-232收發(fā)器（5發(fā)3收）) |
| MAX3248EEAI | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| MAX3238EEAI | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| MAX325EJA | Precision, Single-Supply, SPST Analog Switches |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3238EAI | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3238EAI+ | 功能描述:RS-232接口集成電路 3-5.5V 250kbps Transceiver RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3238EAI+T | 功能描述:RS-232接口集成電路 3-5.5V 250kbps Transceiver RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3238EAI-T | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3238ECAI | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
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