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PDF SP3244E Data sheet ( Hoja de datos )
| Número de pieza | SP3244E | |
| Descripción | 3.0V to 5.5V RS-232 Transceivers | |
| Fabricantes | Sipex | |
| Logotipo |  |
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SP3244E-SP3245E
3.0V to 5.5V RS-232 Transceivers with Auto On-Line Plus®
FEATURES
• Contains 3-Drivers and 5-Receivers;
Single-chip DTE (PC or terminal) serial port transceiver
• Auto On-line Plus®
• SP3244E slew-controlled to 250Kbps under load
• SP3245E 1Mbps data rate for high-speed RS-232
• Meets true EIA/TIA-232-F and ITU V.28 standards
from a +3.0V to +5.5V power supply
• Adheres to EIA/TIA-562 for interoperability
with EIA/TIA-232 down to a +2.7V supply voltage
• Regulated charge pump yields stable RS-232
outputs regardless of VCC variations
• ESD Specifications:
±15KV Human Body Model
±15KV IEC1000-4-2 Air Discharge
± 8KV IEC1000-4-2 Contact Discharge
C2+ 1
C2- 2
V- 3
R1IN 4
R2IN 5
R3IN 6
R4IN 7
R5IN 8
28 C1+
27 V+
26 VCC
25 GND
24 C1-
SP3244E 23 ONLINE
SP3245E 22 SHUTDOWN
21 STATUS
T1OUT 9
20 R2OUT
T2OUT 10
19 R1OUT
APPLICATIONS
• Portable RS-232
• Laptops and handheld PCs and PDA
• Cellular telephones, datacables, chargingcradles
• Diagnostic/upload ports on embedded applications
• Use in conjunction with low-voltage UART or
microcontroller
• SP3244E is cross-compatible with MAX3244E,
ICL3244E
• SP3245E is cross-compatible with MAX3245E,
ICL3245E
T3OUT 11
T3IN 12
T2IN 13
T1IN 14
18 R2OUT
17 R3OUT
16 R4OUT
15 R5OUT
DESCRIPTION
The SP3244E/3245E is a 3-driver/5-receiver device ideal for mobile phone, consumer and PDA
applications. These devices use an internal high-efficiency, charge-pump power supply that requires
only 0.1µF capacitors for 3.3V single-supply operation. This charge pump and Sipex’s driver archi-
tecture allow the SP3244E/3245E to deliver compliant RS-232 performance from a power supply
ranging from +3.0V to +5.5V. At voltages between +2.7V and +3.0V the driver outputs are compliant
with RS-562 and can interface to RS-232 in portable applications.
The Auto On-line Plus® feature allows the device to automatically enter a low power shutdown
mode if all receiver and driver inputs have been idle for 30 seconds. The device will “wake-up” from
this automatic shutdown state upon detecting activity. This power saving feature functions without
system intervention or modifications to software or drivers.
SP3244E supports serial data rates of 250kbps minimum under full load and while maintaining
slew rates of less than 30V/µs. SP3245E is capable of high speed communication of up to 1Mbps.
Rev K 9/25/06
DataSheet4 U .com
SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line Plus®
1
© Copyright 2006 Sipex Corporation
1 page  
www.DataSheet4U.com
TIMING CHARACTERISTICS
Unless otherwise noted VCC = +3.0V to +5.5V, TAMB = TMIN to TMAX, C1–C4 = 0.1µF. Typical values are
at TAMB = +25°C, VCC = 3.3V.
PARAMETERS
SP3244E
Maximum Data Rate
Driver Propagation Delay
Transition-Region Slew Rate
Driver Skew
Receiver Propagation Delay
Receiver Output Enable Time
Receiver Output Disable Time
Receiver Skew
SP3245E
Maximum Data Rate
Driver Propagation Delay
Transition-Region Slew Rate
Driver Skew
Receiver Propagation Delay
Receiver Output Enable Time
Receiver Output Disable Time
Receiver Skew
SYMBOL
TEST CONDITIONS
MIN.
tDPHL, tDPLH
RL = 3kΩ, CL = 1000pF. One
transmitter switching.
CL=1000pF
RL=3kΩ to 7kΩ, CL=150pF to
1000pF, measurements taken
from +3V to -3V or from -3V to
+3V.
|tDPHL - tDPLH| at zero crossing
tRPHL,tRPLH
tRZH , tRZL
tRZH , tRLZ
RIN to ROUT, CL = 150pF
|tPHL - tPLH| at 1.5V
250
4
tDPHL, tDPLH
tRPHL,tRPLH
tRZH , tRZL
tRZH , tRLZ
RL = 3kΩ, CL = 250pF. One
transmitter switching.
RL = 3kΩ, CL = 1000pF. One
transmitter switching.
CL=250pF
RL=3kΩ to 7kΩ, CL=150pF to
250pF, measurements taken from
+3V to -3V or from -3V to +3V.
|tDHPL - tDPLH| at zero crossing
RIN to ROUT, CL = 150pF
|tPHL - tPLH| at 1.5V
1000
500
24
TYP.
1600
50
0.15
0.04
0.1
40
700
100
0.15
0.05
0.1
90
MAX. UNIT
kbps
ns
30 V/µs
ns
µs
2.0 µs
2.0 µs
ns
kbps
kbps
ns
150 V/µs
ns
µs
2.0 µs
2.0 µs
ns
Rev K 9/25/06
DataSheet4 U .com
SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line Plus®
5
© Copyright 2006 Sipex Corporation
5 Page 
www.DataSheet4U.com
DESCRIPTION
+
V
CC
Phases 1 and 3: Store/Double.
- Double charge from C1 onto C2.
C2 is now charged to -2xVcc
C+
1
C+
2 e-
e-
+
V+
C
3
V- +
C
4
+
V
CC
- Phase 2 – Vss transfer from C2 to C4.
Meanwhile C1 is charged to Vcc
C+
1 e-
+
C+
V+
C
3
2
e-
e- +
C
4
Vss
Patented 5,306,954 (Sipex, inc.)
C+
1
e-
+
V
CC
-
Phase 4 VDD transfer from C2 to C3.
Meanwhile C1 is charged to Vcc
V
DD
e+
e+
+
C+
2
V+
C
3
V- +
C
4
Charge Pump Phases
Minimum Recommended Charge Pump Capacitor Values
Input Voltage VCC
Charge Pump Capacitor Value for SP32XX
3.0V to 3.6V
C1-C4=0.1µF
4.5V to 5.5V
3.0V to 5.5V
C1=0.047µF, C2-C4=0.33µF
C1-C4=0.22µF
Charge Pump Capacitor Values
Rev K 9/25/06
DataSheet4 U .com
SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line Plus®
11
© Copyright 2006 Sipex Corporation
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet SP3244E.PDF ] | |
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