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參數(shù)資料
| 型號： | MAX3189EUT-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | 2.5-V/3.3-V Oscillator Gain Stage/Buffer with Enable 8-WSON -40 to 85 |
| 中文描述： | LINE DRIVER, PDSO6 |
| 封裝： | SOT-23, 6 PIN |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 141K |
| 代理商： | MAX3189EUT-T |
Detailed Description
The MAX3188E/MAX3189E are EIA/TIA-232 transmitters
that convert CMOS/TTL logic levels to RS-232 signals.
They operate on ±4.5V to ±6V supplies and feature
enhanced electrostatic discharge protection (see
ESD
Protection
). The MAX3188E guarantees a 250kbps data
rate, and the MAX3189E guarantees a 1Mbps data rate
with worst-case loads of 3k
in parallel with 1000pF.
The MAX3188E/MAX3189E invert the TOUT signal relative
to TIN (standard RS-232). The transmitter input does
not have a pull-up resistor and should be connected to
GND if unused.
Shutdown
The MAX3188E/MAX3189E feature a shutdown input.
Drive
SHDN
low to reduce the supply current to 1μA
(max). Shutdown also forces TOUT into a high-imped-
ance state, allowing the signal line to be safely con-
trolled by other transmitters. Drive
SHDN
high for
normal operation.
ESD Protection
As with all Maxim devices, ESD protection structures are
incorporated on all pins to protect against ESD encoun-
tered during handling and assembly. The MAX3188E/
MAX3189Es’ transmitter output has extra protection
against static electricity. Maxim has developed state-of-
the-art structures enabling this pin to withstand ESD up
M
±15kV ESD-Protected, 1Mbps, 1μA
RS-232 Transmitters in SOT23-6
4
_______________________________________________________________________________________
Pin Description
50%
50%
50%
50%
t
PLH
t
PHL
+5V
-5V
TOUT
TIN
V
IH
V
IL
Figure 1. Transmitter Propagation-Delay Timing
SHDN
TOUT
0
-5V
+5V
0
+2V
1
μ
s/div
MAX3188E
TRANSMITTER OUTPUT
SHUTDOWN WAVEFORM
C
L
= 150pF
SHDN
TOUT
0
-5V
+5V
0
+2V
1
μ
s/div
MAX3189E
TRANSMITTER OUTPUT
SHUTDOWN WAVEFORM
C
L
= 150pF
Typical Operating Characteristics (continued)
(V
CC
= +5.4V, V
EE
= -5.4V, R
L
= 3k
, T
A
= +25°C, unless otherwise noted.)
NAME
FUNCTION
1
SHDN
Active-Low Shutdown. Pull low to
reduce the supply current and to force
TOUT into a high-impedance state.
2
GND
Ground
PIN
3
TIN
TTL/CMOS Transmitter Input
4
TOUT
RS-232 Transmitter Output
6
V
CC
Positive Supply Voltage
5
V
EE
Negative Supply Voltage
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