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參數(shù)資料
| 型號(hào)： | SP207HCP |
| 英文描述： | PT 8C 8#20 PIN/SKT RECP |
| 中文描述： | 5V的高速RS - 232收發(fā)器 |
| 文件頁數(shù)： | 7/14頁 |
| 文件大?。?/td> | 216K |
| 代理商： | SP207HCP |
7
TGoddard/SP207H/9614R0
SP207H/SP211H High–Speed Transceivers
Copyright 2000 Sipex Corporation
Power
Up/Down
Up
Up
Down
Down
Receiver
Outputs
Enable
Tri–state
Tri-state
Tri–state
SD
0
0
1
1
EN
0
1
0
1
SHUTDOWN MODE
The
SP207HB
,
SP211H
and
SP211HB
all fea-
ture a control input which will disable the device
and reduce the power supply current to less than
10
μ
A, making the parts ideal for battery–pow-
ered systems. In the “shutdown” mode the re-
ceivers and transmitters will both be tri–stated.
The V
+
output of the charge pump will discharge
to V
, and the V
–
output will discharge to
ground.
For complete shutdown to occur and the 10
μ
A
power drain to be realized, the following condi-
tions must be met:
+5V must be applied to the SD pin
ENABLE must be either 0V, +5.0V or not
connected
the transmitter inputs must be either +5.0V
or not connected
V
CC
must be +5V
Receiver inputs must be >0V and <+5V
ENABLE
The
SP207HB, SP211H
and
SP211HB
feature
an enable input pin, which allows the receiver
V
CC
= +5V
+10V
V
SS
Storage Capacitor
V
DD
Storage Capacitor
C
1
C
2
C
3
C
4
+
+
+
+
–
–
–
–
Table 2. Truth Table for SP2xxH
Power
Up/Down
Up
Up
Down
Down
Receiver
Outputs
Enable
Tri–state
Enable
Tri–state
SD
0
0
1
1
EN
0
1
0
1
Table 3. Wake–Up Truth Table for SP2xxHB
Figure 5. Charge Pump — Phase 4
outputs to be either tri–stated or enabled. This
can be especially useful when the receiver is tied
directly to a microprocessor data bus. The en-
able is active low; that is, 0V applied to the
ENABLE pin will enable the receiver outputs.
WAKEUP FUNCTION
The
SP207HB
and
SP211HB
have a wake–up
feature that keeps all the receivers in an enabled
state when the device is in the shutdown mode.
With only the receivers active during shutdown,
the devices draw 5–10
μ
A of supply current. A
typical application of this function would be
where a modem is interfaced to a computer in a
power–down mode. The ring indicator signal
from the modem could be passed through an
active receiver that is in the shutdown mode.
The ring indicator signal would propagate
through the receiver to the power management
circuitry of the computer to power up the micro-
processor and the
SP207HB/SP211HB
drivers.
After the supply voltage to the transceivers
reaches +5.0V, the SHUTDOWN pin can be
disabled. All receivers that are active during
shutdown maintain 500mV (typ.) of hysteresis.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP211HBCA | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| SP211HBCT | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| SP211HBEA | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| SP211HBET | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| SP207H | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP207HCT | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+5V High-Speed RS-232 Transceivers |
| SP207HEA | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+5V High-Speed RS-232 Transceivers |
| SP207HEP | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+5V High-Speed RS-232 Transceivers |
| SP207HET | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+5V High-Speed RS-232 Transceivers |
| SP207R68JLF | 制造商:TT Electronics / IRC 功能描述:SP207R68JLF |
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