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參數(shù)資料
| 型號： | MAX3317 |
| 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)： | 8/16頁 |
| 文件大?。?/td> | 190K |
| 代理商： | MAX3317 |
M
±15kV ESD-Protected, 2.5V, 1μA, 460kbps,
RS-232 Compatible Transceivers
8
_______________________________________________________________________________________
down is typically 30μs, as shown in Figure 2. Connect
SHDN
to V
CC
if the shutdown mode is not used;
SHDN
has no effect on R_OUT.
MAX3318E/MAX3319E
AutoShutdown Plus Mode
Maxim’s AutoShutdown Plus feature on the MAX3318E/
MAX3319E allows the supply current to fall to 1μA.
These devices will enter the AutoShutdown Plus mode if
FORCEOFF
is high, FORCEON is low, and they do not
sense a valid signal transition on any receiver or trans-
mitter input for 30 seconds. This may occur if the RS-232
cable is disconnected or if the peripheral transmitters
are turned off, and the UART driving the transmitter
inputs is inactive. The system turns on again when a
valid transition is applied to any RS-232 receiver or
transmitter input. As a result, the system saves power
without changes to the existing BIOS or operating system.
Figure 4a depicts valid and invalid RS-232 receiver volt-
age levels.
INVALID
indicates the receiver input’s condi-
tion and is independent of FORCEON and
FORCEOFF
states. Figure 3 and Table 1 summarize the operating
modes of the MAX3318E/MAX3319E. FORCEON and
FORCEOFF
override AutoShutdown Plus circuitry. When
neither control is asserted, the IC selects between these
states automatically based on the last receiver or trans-
mitter edge received.
When shut down, the device’s charge pumps turn off,
V+ is pulled to V
CC
, V- is pulled to ground, the transmitter
outputs are high impedance, and READY is driven low.
The time required to exit shutdown is typically 30μs
(Figure 2).
X
X
X
X
VALID RECEIVER
LEVEL
Active
Active
Active
Active
R_OUT
No
Yes
X
X
RECEIVER OR
TRANSMITTER
EDGE WITHIN
30s
High-Z
Active
Active
High-Z
T_OUT
Shutdown
(AutoShutdown Plus)
0
1
Normal Operation
(AutoShutdown Plus)
0
1
Normal Operation
(Forced On)
1
1
Shutdown (Forced
Off)
X
0
OPERATION
STATUS
FORCEON
FORCEOFF
No
Yes
No
X
Yes
Active
Active
Active
Active
Active
X
X
No
Yes
X
High-Z
Active
High-Z
Active
Active
Shutdown
(AutoShutdown)
INVALID
**
INVALID
**
Normal Operation
(AutoShutdown)
INVALID
**
INVALID
**
Shutdown
INVALID
*
1
Normal Operation
INVALID
*
1
Normal Operation
INVALID
*
1
Table 1. Output Control Truth Table (MAX3318E/MAX3319E)
Table 2. Shutdown and Enable Control
Truth Table (MAX3317E)
X = Don’t care
*
INVALID
connected to FORCEON
**
INVALID
connected to FORCEON and
FORCEOFF
SHDN
0
0
1
1
EN
0
1
0
1
T_OUT
High-Z
High-Z
Active
Active
R_OUT
Active
High-Z
Active
High-Z
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3317CAP | 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 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3317CUP | 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 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3317CUP+ | 功能描述:RS-232接口集成電路 460kbps 1uA 2.5V 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 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3317CUP+T | 功能描述:RS-232接口集成電路 460kbps 1uA 2.5V 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 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3317CUP-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 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
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