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參數(shù)資料
| 型號： | MAX3230EEBV-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| 中文描述： | DUAL LINE TRANSCEIVER, PBGA30 |
| 封裝： | UCSP-30 |
| 文件頁數(shù)： | 10/15頁 |
| 文件大小： | 797K |
| 代理商： | MAX3230EEBV-T |
M
±15kV ESD-Protected +2.5V to +5.5V
RS-232 Transceivers in UCSP
a larger nominal value. The capacitor’s equivalent series
resistance (ESR) usually rises at low temperatures and
influences the amount of ripple on V+ and V-.
Power-Supply Decoupling
In most circumstances, a 0.1μF V
CC
bypass capacitor
is adequate. In applications that are sensitive to power-
supply noise, use a capacitor of the same value as the
charge-pump capacitor C1. Connect bypass capaci-
tors as close to the IC as possible.
Transmitter Outputs when
Exiting Shutdown
Figure 7
shows a transmitter output when exiting shut-
down mode. The transmitter is loaded with 3k
in par-
allel with 1000pF. The transmitter output displays no
ringing or undesirable transients as it comes out of
shutdown, and is enabled only when the magnitude of
V- exceeds approximately -3V.
High Data Rates
The MAX3230E/MAX3231E maintain the RS-232 ±5.0V
minimum transmitter output voltage even at high data
rates.
Figure 8
shows a transmitter loopback test cir-
cuit.
Figure 9
shows a loopback test result at 120kbps,
and
Figure 10
shows the same test at 250kbps. For
Figure 9
, the transmitter was driven at 120kbps into an
RS-232 load in parallel with 1000pF. For
Figure 10
, a
single transmitter was driven at 250kbps and loaded
with an RS-232 receiver in parallel with 1000pF.
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
tr = 0.7ns to 1ns
30ns
60ns
t
100%
90%
10%
I
P
I
Figure 6b. IEC 1000-4-2 ESD Generator Current Waveform
V
CC
(V)
2.5 to 3.0
3.0 to 3.6
4.5 to 5.5
3.0 to 5.5
C1, C
BYPASS
(μF)
0.22
0.1
0.047
0.22
C2, C3, C4 (μF)
0.22
0.1
0.33
1
Table 3. Required Capacitor Values
10
_____________________________________________________________________________________
CHARGE-CURRENT-
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
100pF
R
C
1M
R
D
1500
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
Figure 5a. Human Body ESD Test Models
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 5b. Human Body Model Current Waveform
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3231AEEWV+ | 制造商:Maxim Integrated Products 功能描述:+/- 15KV ESD-PROTECTED +2.5V TO +5. - Bulk |
| MAX3231AEEWV+T | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:RS-232 Interface IC 15kV ESD-P, 2.5-5.5V RS-232 Transceiver |
| MAX3231EBV | 制造商:Maxim Integrated Products 功能描述:+/- 15KV ESD-PROTECTED +2.5V TO +5. - Rail/Tube |
| MAX3231EEBV | 制造商:Maxim Integrated Products 功能描述:+/- 15KV ESD-PROTECTED +2.5V TO +5. - Rail/Tube |
| MAX3231EEBV-T | 制造商:Maxim Integrated Products 功能描述:+/- 15KV ESD-PROTECTED +2.5V TO +5.5V RS-232 - Tape and Reel |
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