SP200 Datasheet, PDF (8/15 Pages) Sipex Corporation – +5V High-Speed RS-232 Transceivers with 0.1uF Capacitors

V_CC = +5V
+
C_{1 –}
+10V
+
C_{2 –}
Figure 5. Charge Pump — Phase 4
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
SHUTDOWN MODE
The SP200, SP205, SP205B, SP206, SP206B,
SP207B, SP211, SP211B and SP213 all feature
a control input which will disable the device and
reduce the power supply current to less than
10µA, 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_CC, and the V^– output will discharge to
ground. Products with the WakeUp function can
enable or disable the receivers during shutdown.
For complete shutdown to occur and the 10µA
power drain to be realized, the following condi-
tions must be met:
SP200, SP205/B, SP206/B, SP207B and SP211/B:
• +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
SP213:
• 0V 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 SP205/B, SP206/B, SP207/B, SP211 and
SP213 all feature an enable input, which allows
the receiver outputs to be either tri–stated or
enabled. This can be especially useful when the
receiver is tied directly to a microprocessor data
bus. For the SP205/B, SP206/B, SP207/B and
SP211, enable is active low; that is, 0V applied
to the ENABLE pin will enable the receiver
outputs. For the SP213, enable is active high;
that is, +5V applied to the ENABLE pin will
enable the receiver outputs.
SP213 Only Power
SD EN SD EN Up/Down
0 01
1
Up
0 11
0
Up
1 00
1
Down
1 10
0
Down
Table 2. Wake–Up Truth Table
Receiver
Outputs
Enable
Tri–state
Enable
Tri–state
WAKEUP FUNCTION
The SP205B, SP206B, SP207B, SP211B and
SP213 have a wake–up feature that keeps two or
more receivers in an enabled state when the
device is in the shutdown mode. The SP213 has
two receivers active (R and R ), while the
4
5
SP205B, SP207B and SP211B have all receiv-
ers active during shutdown. With only the re-
ceivers active during shutdown, the devices
draw 5–10µA of supply current.
REV: A DATE:12/03/2003
+5V High-Speed RS232 Transceivers
8
© Copyright 2000 Sipex Corporation