SP3238 SIPEX [Sipex Corporation], SP3238 Datasheet
SP3238
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SP3238 Summary of contents
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... Variations ■ ESD Specifications: +2kV Human Body Model The SP3238 device is an RS-232 transceiver solution intended for portable or hand-held applications such as notebook and palmtop computers. The SP3238 uses 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 SP3238 device to deliver compliant RS-232 performance from a single power supply ranging from +3 ...
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... µ µ SP3238 Intelligent +3.0V to +5.5V RS-232 Transceiver above +70 C).................900mW o C above +70 o C)...............1100mW ...
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... µ µ µS SP3238 Intelligent +3.0V to +5.5V RS-232 Transceiver ...
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... V µs TYPICAL PERFOMANCE CHARACTERISTICS = +3.3V, 250kbps data rate, all drivers loaded with 3kΩ, 0.1µF charge VOH 10 VOL 5000 1000 SP3238 Intelligent +3.0V to +5.5V RS-232 Transceiver Ω ...
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... SP3238 Intelligent +3.0V to +5.5V RS-232 Transceiver ...
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... T 2 OUT T 3 OUT OUT OUT OUT R3IN OUT T 5 OUT ONLINE OUT 14 15 STATUS SP3238 Intelligent +3.0V to +5.5V RS-232 Transceiver 6 © Copyright 2003 Sipex Corporation ...
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... T OUT OUT OUT 1 5kΩ OUT 2 5kΩ OUT 3 5kΩ SHUTDOWN ONLINE STATUS GND 2 SP3238 Intelligent +3.0V to +5.5V RS-232 Transceiver 0.1µ 0.1µ RS-232 OUTPUTS RS-232 2 INPUTS © Copyright 2003 Sipex Corporation ...
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... Otherwise, the system automatically comes online. This feature allows design engineers to address power saving concerns without major design changes. THEORY OF OPERATION The SP3238 device is made up of four basic circuit blocks: 1. Drivers, 2. Receivers, 3. the Sipex proprietary charge pump, and 4. AUTO ON-LINE may be ...
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... OUT. R OUT interference can degrade the signal, the inputs 1 1 have a typical hysteresis margin of 300mV. This ensures that the receiver is virtually immune to Figure 9. Loopback Test Circuit result at 250kbps (All Drivers Fully Loaded) SP3238 Intelligent +3.0V to +5.5V RS-232 Transceiver C1 0.1µ ...
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... – is connected the switched 1 SP3238 Intelligent +3.0V to +5.5V RS-232 Transceiver 10 (Figure 14) produces –V in the negative which is applied to the negative 1 . Since times (Figure 15) ...
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... – – – – –5V – + – – – –10V SP3238 Intelligent +3.0V to +5.5V RS-232 Transceiver 11 V Storage Capacitor DD V Storage Capacitor SS 4 – V Storage Capacitor Storage Capacitor © Copyright 2003 Sipex Corporation ...
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... – – – C –5V – + +10V + + + – – – C SP3238 Intelligent +3.0V to +5.5V RS-232 Transceiver -6V 4 – V Storage Capacitor Storage Capacitor – V Storage Capacitor Storage Capacitor SS 3 © Copyright 2003 Sipex Corporation ...
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... SHUTDOWN 13 ONLINE 15 To µP Supervisor STATUS Circuit DB-9 Connector Pins: 1. Received Line Signal Detector 2. Received Data 3. Transmitted Data 4. Data Terminal Ready 5. Signal Ground (Common) Figure 16. Circuit for the connectivity of the SP3238 with a DB-9 connector Rev. 6/30/ SP3238 C3 0.1µ 0.1µF ...
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... Inactive Detection Block RS-232 Receiver Block ® Circuitry Delay Delay Stage Stage R INACT R INACT 2 3 ® Circuitry SP3238 Intelligent +3.0V to +5.5V RS-232 Transceiver ...
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... RS-232 signal present on any receiver input. logic HIGH when the external transmitters are enabled and the cable is connected. When the SP3238 device is shut down, the charge pump is turned off. V+ charge pump output decays to V GND. The decay time will depend on the size of capacitors used for the charge pump ...
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... S 1.5kΩ and 100pF, respectively Power Source Figure 19. ESD Test Circuit for Human Body Model Rev. 6/30/03 ) are SW1 SW1 SP3238 Intelligent +3.0V to +5.5V RS-232 Transceiver 16 SW2 SW2 Device Under Test © Copyright 2003 Sipex Corporation ...
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... H A DIMENSIONS (Inches) Minimum/Maximum 28–PIN (mm) A 0.068/0.078 (1.73/1.99) A1 0.002/0.008 (0.05/0.21) B 0.010/0.015 (0.25/0.38) D 0.397/0.407 (10.07/10.33) E 0.205/0.212 (5.20/5.38) e 0.0256 BSC (0.65 BSC) H 0.301/0.311 (7.65/7.90) L 0.022/0.037 (0.55/0.95) Ø 0°/8° (0°/8°) SP3238 Intelligent +3.0V to +5.5V RS-232 Transceiver 17 SMALL OUTLINE (SSOP) Ø L © Copyright 2003 Sipex Corporation ...
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... REF L 0.45 0.6 L1 1.00 REF Note: Dimensions in (mm) Rev. 6/30/03 PACKAGE: 20 PIN TSSOP Seating Plane MAX 1.2 0.15 1.05 0.3 0.2 6.6 4.5 8º 0.75 SP3238 Intelligent +3.0V to +5.5V RS-232 Transceiver 18 Ø Seaing Plane Ø DETAIL A SEE DETAIL “A” Section B-B © Copyright 2003 Sipex Corporation Ø ...
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... SP3238CY/TR SP3238EA SP3238EA/TR SP3238EY SP3238EY/TR Available in lead free packaging. To order add “-L” suffix to part number. Example: SP3238EA/TR = standard; SP3238EA-L/TR = lead free /TR = Tape and Reel Pack quantity is 1,500 for SSOP and TSSOP. CLICK HERE TO ORDER SAMPLES Corporation ANALOG EXCELLENCE Sipex Corporation ...