參數(shù)資料
型號: MAX3320_CAP
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): 1/12頁
文件大?。?/td> 128K
代理商: MAX3320_CAP
_______________General Desc ription
The MAX3320 combines a microprocessor (μP) super-
visory circuit with an RS-232 transceiver. The power-on
reset performs a single function: it asserts a reset signal
whenever the V
CC
supply voltage declines below a pre-
set threshold, staying asserted for at least 100ms after
V
CC
rises above the reset threshold. The MAX3320 has
an active-low
RESET
output, which is guaranteed to be in
the correct state for V
CC
down to 1V. The reset compara-
tor is designed to ignore fast transients on V
CC
. Reset
thresholds suitable for operation with a variety of supply
voltages are available.
The MAX3320 transceivers have a proprietary low-
dropout transmitter output stage, enabling true RS-232
performance with a dual charge pump powered from a
+3V to +5.5V supply. The device requires only four
small 0.1μF external charge-pump capacitors, and is
guaranteed to run at data rates of up to 250kbps. It
comes in the space-saving 20-pin SSOP package.
________________________Applic ations
Palmtop Computers
Portable/Battery-Powered Equipment
Hand-Held Equipment
Peripherals
Printers
____________________________Features
o
Precise Monitoring of 5V and 3.3V Power-
Supply Voltages:
— 100ms (min) Power-On
RESET
Pulse Width
— Power-Supply Transient Immunity
— Guaranteed
RESET
Valid to V
CC
= 1V
o
4μA Supply Current Achieved with
AutoShutdown Plus
o
Receivers Always Active
o
Power-On Reset Always Active
o
4μA Low-Power Shutdown
o
250kbps Guaranteed Data Rate
M
3V to 5.5V, up to 250kbps True RS-232 Transceiver
with 4μA AutoShutdown Plus and Power-On Reset
________________________________________________________________ Maxim Integrated Products
1
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
C1+
V
CC
C1-
GND
V-
C2-
C2+
V+
TOP VIEW
T1OUT
T2OUT
R1IN
R2IN
R2OUT
R1OUT
T2IN
T1IN
12
11
9
10
FORCEON
FORCEOFF
RESET
INVALID
MAXxxx
SSOP
MAX3320
__________________Pin Configuration
19-1253; Rev 0; 8/97
PART*
MAX3320
_
CAP
MAX3320_EAP
-40°C to +85°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
20 SSOP
20 SSOP
______________Ordering Information
*This part offers a choice of reset threshold voltage. From the
table below, select the suffix corresponding to the desired
threshold and insert it into the blank to complete the part
number.
AutoShutdown Plus is a trademark of Maxim Integrated Products.
SUFFIX
A
B
L
T
RESET THRESHOLD
(V)
4.25
2.85
4.63
3.08
Typical Operating Circuit appears at end of data sheet.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
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