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PDF 3223ECY Data sheet ( Hoja de datos )
| Número de pieza | 3223ECY | |
| Descripción | SP3223ECY | |
| Fabricantes | Sipex Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de 3223ECY (archivo pdf) en la parte inferior de esta página. Total 23 Páginas | ||
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IntIenltleiglliegnetn+t 3+3.0.0VVtoto++55..55VV RRSS--223322TTrraannsscceeivievresrs
FEATURES
■ Meets true EIA/TIA-232-F Standards
from a +3.0V to +5.5V power supply
■ Interoperable with EIA/TIA-232 and
adheres to EIA/TIA-562 down to a +2.7V
EN 1
C1+ 2
V+ 3
20 SHUTDOWN
19 VCC
18 GND
power source
■ AUTO ON-LINE® circuitry automatically
wakes up from a 1µA shutdown
■ Minimum 250Kbps data rate under load
C1- 4
C2+ 5
C2- 6
SP3223
17 T1OUT
16 R1IN
15 R1OUT
(EB)
■ 1 Mbps data rate for high speed RS-232
(EU)
■ Regulated Charge Pump Yields Stable
V- 7
T2OUT 8
R2IN 9
14 ONLINE
13 T1IN
12 T2IN
RS-232 Outputs Regardless of VCC
Variations
R2OUT 10
11 STATUS
■ ESD Specifications:
+15KV Human Body Model
Now Available in Lead Free Packaging
+15KV IEC1000-4-2 Air Discharge
+8KV IEC1000-4-2 Contact Discharge
DESCRIPTION
The SP3223 products are RS-232 transceiver solutions intended for portable applications
such as notebook and hand held computers. The SP3223 use an internal high-efficiency,
charge-pump power supply that requires only 0.1µF capacitors in 3.3V operation. This charge
pump and Sipex's driver architecture allow the SP3223 series to deliver compliant RS-232
performance from a single power supply ranging from +3.3V to +5.0V. The SP3223 is a 2-
driver/2-receiver device ideal for laptop/notebook computer and PDA applications.
The AUTO ON-LINE® feature allows the device to automatically "wake-up" during a shutdown
state when an RS-232 cable is connected and a connected peripheral is turned on. Otherwise,
the device automatically shuts itself down drawing less than 1µA.
SELECTION TABLE
Device
Power
Supplies
RS-232 RS-232
External
AUTO ON-LINE®
Drivers Receivers Components Circuitry
SP3223 +3.0V to +5.5V
2
2
4 capacitors
YES
SP3223E +3.0V to +5.5V
2
2
4 capacitors
YES
SP3223B +3.0V to +5.5V
2
2
4 capacitors
YES
SP3223EB +3.0V to +5.5V
2
2
4 capacitors
YES
SP3223U +3.0V to +5.5V
2
2
4 capacitors
YES
SP3223EU +3.0V to +5.5V
2
2
4 capacitors
YES
Applicable U.S. Patents - 5,306,954; and other patents pending.
TTL 3-
State
YES
YES
YES
YES
YES
YES
# of Gauranteed ESD
Pins Data Rate Rating
20 120 2kV
20 120 15kV
20 250 2kV
20 250 15kV
20 1000 2kV
20
1000
15kV
Date: 08/25/05
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
1SP3223 +3.0V to +5.5V RS-232 Transceivers
© Copyright 2005 Sipex Corporation
© Copyright 2006 Sipex Corporation
1 page  
www.DataSheet4U.com
+3V to +5V
TYPICAL OPERATING CIRCUIT
+
C5 0.1µF
+
C1 0.1µF
2 C1+
4 C1-
+
C2 0.1µF
5 C2+
6 C2-
TTL/CMOS
INPUTS
13 T1IN
12 T2IN
19
VCC
V+ 3
+
C3 0.1µF
SP3223
V- 7
C4 0.1µF
+
T1OUT 17
T2OUT 8
RS-232
OUTPUTS
TTL/CMOS
OUTPUTS
15 R1OUT
10 R2OUT
R1IN 16
5KΩ
R2IN 9
5KΩ
RS-232
INPUTS
VCC
To µP Supervisor
Circuit
1 EN
20
SHUTDOWN
14 ONLINE
11 STATUS
GND
18
Figure 1. SP3223 Typical Operating Circuit
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
5
© Copyright 2006 Sipex Corporation
5 Page 
consists of a regulated dual charge pump that
www.DpraotvaiSdehseoeut4tpUu.tcvoomltages 5.5V regardless of the
input voltage (VCC) over the +3.0V to +5.5V
range. This is important to maintain compliant
RS-232 levels regardless of power supply
fluctuations.
The charge pump operates in a discontinuous
mode using an internal oscillator. If the output
voltages are less than a magnitude of 5.5V, the
charge pump is enabled. If the output voltages
exceed a magnitude of 5.5V, the charge pump is
disabled. This oscillator controls the four phases
of the voltage shifting. A description of each
phase follows.
Phase 1
— VSS charge storage — During this phase of
the clock cycle, the positive side of capacitors
C1 and C2 are
then switched
transferred to
tCion2iG–t.iaNlSlDyinaccnhedarCtgh2e+edcisthoacrVognCenCie.nctCCed1l+–
is
is
to
VCC, the voltage potential across capacitor C2 is
now 2 times VCC.
voltage is regulated to +5.5V. At this voltage,
the internal oscillator is disabled. Simultaneous
with the transfer of the voltage to C4, the
positive side of capacitor C1 is switched to VCC
and the negative side is connected to GND,
allowing the charge pump cycle to begin again.
The charge pump cycle will continue as long as
the operational conditions for the internal
oscillator are present.
Since both V+ and V– are separately generated
from VCC, in a no–load condition V+ and V– will
be symmetrical. Older charge pump approaches
that generate V– from V+ will show a decrease in
the magnitude of V– compared to V+ due to the
inherent inefficiencies in the design.
AUTO ON-LINE® Circuitry
The SP3223 devices have a patent pending
AUTO ON-LINE® circuitry on board that saves
power in applications such as laptop computers,
PDA's, and other portable systems.
Phase 2
— VSS transfer — Phase two of the clock
connects the negative terminal of C2 to the VSS
storage capacitor and the positive terminal of C2
to GND. This transfers a negative generated
voltage to C3. This generated voltage is
regulated to a minimum voltage of -5.5V.
Simultaneous with the transfer of the voltage to
C3, the positive side of capacitor C1 is switched
to VCC and the negative side is connected to
GND.
Phase 3
— VDD charge storage — The third phase of the
clock is identical to the first phase — the charge
transferred in C1 produces –VCC in the negative
terminal of C1, which
side of capacitor C2.
is applied to the
Since C2+ is at
negative
VCC, the
voltage potential across C2 is 2 times VCC.
Phase 4
— VDD transfer — The fourth phase of the clock
connects the negative terminal of C2 to GND,
and transfers this positive generated voltage
across C2 to C4, the VDD storage capacitor. This
The SP3223 devices incorporate an AUTO
ON-LINE® circuit that automatically enables
itself when the external transmitters are enabled
and the cable is connected. Conversely, the
AUTO ON-LINE® circuit also disables most of
the internal circuitry when the device is not being
used and goes into a standby mode where the
device typically draws 1µA. This function can
also be externally controlled by the ONLINE
pin. When this pin is tied to a logic LOW, the
AUTO ON-LINE® function is active. Once
active, the device is enabled until there is no
activity on the receiver inputs. The receiver
input typically sees at least ±3V, which are
generated from the transmitters at the other end
of the cable with a ±5V minimum. When the
external transmitters are disabled or the cable is
disconnected, the receiver inputs will be pulled
down by their internal 5kΩ resistors to ground.
When this occurs over a period of time, the
internal transmitters will be disabled and the
device goes into a shutdown or standby mode.
When ONLINE is HIGH, the AUTO ON-LINE®
mode is disabled.
Date: 10/06/06
SP3223 +3.0V to +5.5V RS-232 Transceivers
11
© Copyright 2006 Sipex Corporation
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet 3223ECY.PDF ] | |
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