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參數資料
| 型號： | MAX3250EAI+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 1/10頁 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS-232 250KBPS 28-SSOP |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,000 |
| 類型： | 收發器 |
| 驅動器/接收器數： | 2/2 |
| 規程： | RS232 |
| 電源電壓： | 3 V ~ 5.5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SSOP（0.209"，5.30mm 寬） |
| 供應商設備封裝： | 28-SSOP |
| 包裝： | 帶卷 (TR) |
General Description
The MAX3250 is a 3.0V to 5.5V powered, ±50V isolated
EIA/TIA-232 and V.28/V.24 communications interface
with high data-rate capabilities. The MAX3250 is a dual
die part that operates with up to ±50V difference
between the RS-232 side and the logic side (ISOCOM
to GND). This makes the device ideal for operation in
noisy conditions with high common-mode voltages.
This feature prevents damage to the device if RS-232
lines are inadvertently short-circuited to a +24V or ±48V
power bus.
The MAX3250 is powered by a single 3V to 5.5V supply
on the logic side. Power is transferred from the logic
side to the isolated side by ±100V external capacitors.
The MAX3250 has two receivers (Rx) and two drivers
(Tx) and is guaranteed to run at data rates of 250kbps
while maintaining RS-232 output levels. The trans-
ceivers have a proprietary low-dropout transmitter out-
put stage, delivering true RS-232 performance from a
3V to 5.5V supply with a dual charge pump. The device
features a FAULT open-drain output to signal an exces-
sive isolated-side voltage condition on any of the RS-
232 inputs. This output can drive an alarm LED or can
be monitored by the processor to prevent operation
under these conditions. The receiver outputs are high
impedance in shutdown, allowing multiple interfaces
(IrDA, RS-232, RS-485) to be connected to the same
UART.
The MAX3250 is available in a space-saving 28-pin
SSOP package.
Applications
Industrial Control
Programmable Logic Controller
Point-of-Sale Equipment
PC-to-Router Connections
Diagnostic Ports
Telecom Equipment
Features
o ±50V Isolation
o 20A Supply Current in Shutdown
o 250kbps Guaranteed Data Rate
o FAULT Output
o High-Impedance Transmitter and Receiver
Outputs in Shutdown
o Space-Saving SSOP Package
o Inductorless/Transformerless Design Simplifies
EMI Compliance
o Low-Cost Replacement for Opto-Isolated
Transceivers
o Meets EIA/TIA-232 Specifications Down to 3.0V
MAX3250
±50V Isolated, 3.0V to 5.5V,
250kbps, 2 Tx/2 Rx, RS-232 Transceiver
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
19-2443; Rev 3; 9/11
For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Typical Operating Circuit appears at end of data sheet.
PART
TEMP RANGE
PIN-PACKAGE
MAX3250CAI+
0
°C to +70°C
28 SSOP
MAX3250EAI+
-40
°C to +85°C
28 SSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
VCC
C2-
GND
FAULT
SHDN
N.C.
ISOCOM
N.C.
C2+
ISOVCC
R1IN
R2IN
T1OUT
T2OUT
V-
C4-
C4+
C3-
V+
C3+
C1+
N.C.
T2IN
T1IN
R2OUT
R1OUT
C1-
SSOP
TOP VIEW
MAX3250
+
Pin Configuration
+
Denotes a lead(Pb)-free/RoHS-compliant package.
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