ST3243E ST Microelectronics, ST3243E Datasheet

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ST3243E

Manufacturer Part Number
ST3243E
Description
RS-232 TRANSCEIVER WITH AUTO-POWERDOWN
Manufacturer
ST Microelectronics
Datasheet

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DESCRIPTION
The ST3243E device consists of 3 drivers, 5
receivers and a dual charge-pump circuit. The
device meets the requirements of EIA/TIA and
V.28/V.24 communication standards providing
high
electrostatic discharge (ESD) protection. All
transmitter
protected to ±8KV USING IEC 1000-4-2 contact
discharge and ±15KV using the Human Body
Model. The receiver R2 is always active to
implement a wake-up feature for serial port.
The ST3243E has a proprietary low-dropout
transmitter output stage enabling true RS-232
performance from a 3.0V to 5.5V supply with a
dual charge pump. The device is guaranteed to
run at data rates of 250kbps while maintaining
RS-232 output levels.
The Auto-powerdown feature functions when
FORCEON is low and FORCEOFF is high. During
this mode of operation, if the device does not
sense a valid RS-232 signal, the driver outputs are
March 2004
ESD PROTECTION FOR RS-232 I/O PINS:
±8KV IEC 1000-4-2 CONTACT DISCHARGE
±15KV HUMAN BODY MODEL
1 A SUPPLY CURRENT ACHIEVED WHEN
IN AUTO-POWERDOWN
250Kbps MINIMUM GUARANTEED DATA
RATE
GUARANTEED 6V/ s SLEW RATE RANGE
GUARANTEED MOUSE DRIVEABILITY
0.1 F EXTERNAL CAPACITORS
MEET EIA/TIA-232 SPECIFICATIONS DOWN
TO 3V
AVAILABLE IN SO-28, SSOP-28, TSSOP28
AND FLIP-CHIP28 PACKAGES
data
outputs and
rate
RS-232 TRANSCEIVER WITH AUTO-POWERDOWN
capability
±15KV ESD PROTECTED 3 TO 5.5V, 400KBPS,
receiver
and
input
enhanced
are
disabled. If FORCEOFF is set low, both drivers
and receivers (expert R2B) are shut off, and
supply current is reduced to 1 A. Disconnecting
the serial port or turning off the peripheral drives
causes the auto-powerdown condition to occur.
Auto-powerdown
FORCEON and FORCEOFF are high, and should
be done when driving a serial mouse. With
Auto-powerdown enabled, the device is activated
automatically when a valid signal is applied to any
receiver input.
Typical application are in notebook, subnotebook,
palmtop computers, battery-powered equipment,
hand-held equipment, peripherals and printers.
SSOP
SOP
can
be
Flip-Chip28
ST3243E
TSSOP
disabled
when
1/18

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ST3243E Summary of contents

Page 1

... GUARANTEED MOUSE DRIVEABILITY 0.1 F EXTERNAL CAPACITORS MEET EIA/TIA-232 SPECIFICATIONS DOWN TO 3V AVAILABLE IN SO-28, SSOP-28, TSSOP28 AND FLIP-CHIP28 PACKAGES DESCRIPTION The ST3243E device consists of 3 drivers, 5 receivers and a dual charge-pump circuit. The device meets the requirements of EIA/TIA and V.28/V.24 communication standards providing high data rate capability electrostatic discharge (ESD) protection ...

Page 2

... ORDERING CODES Temperature Type Range ST3243ECD 0 to 70°C ST3243EBD -40 to 85°C ST3243ECDR 0 to 70°C ST3243EBDR -40 to 85°C ST3243ECPR 0 to 70°C ST3243EBPR -40 to 85°C ST3243ECTR 0 to 70°C ST3243EBTR -40 to 85°C ST3243ECJ 0 to 70°C ST3243EBJ -40 to 85°C PIN DESCRIPTION PlN N° ...

Page 3

... This over-rides all automatic circuitry and FORCEON INVALID Output of the valid signal detector. Indicates if a valid RS-232 level is present on receiver inputs logic "1" Non-inverting Complementary Receiver Output, always active R2 OUTB for wake-up R2 Second Receiver Output Voltage OUT ST3243E NAME AND FUNCTION 3/18 ...

Page 4

... ST3243E PIN CONFIGURATION SOP, SSOP, TSSOP (top view) INVALID TRUTH TABLE RS-232 SIGNAL PRESENT AT ANY RECEIVER INPUT YES NO OUTPUT CONTROL TRUTH TABLE FORCE FORCE VALID RECEIVER ON OFF LEVEL YES 4/18 OPERATION STATUS X Shutdown (Force OFF) Normal Operating (Force ...

Page 5

... 13.2 -0 0.3) CC Continuous -65 to 150 Min. Typ. Max Min. Typ. Max 0 Min. Typ. Max. 0.8 2 2.4 0.5 0.01 0.05 0.4 V -0 ST3243E Unit °C Unit KV KV Unit Unit 1 5/18 ...

Page 6

... ST3243E AUTO-POWERDOWN ELECTRICAL CHARACTERISTICS ( 0 5.5V Typical values are referred to T Symbol Parameter V Receiver Input Threshold to RITE INVALID Output Voltage HIGH (Fig Receiver Input Threshold to RITD INVALID Output Voltage LOW (Fig INVALID Output Voltage IOL LOW ...

Page 7

... Test Conditions 1000pF L L one transmitter switching 150pF IN OUT 25° measured from +3V to -3V or - 150pF to 1000pF 150pF to 2500pF L Min. Typ. Max. 250 400 0.15 150 3. ST3243E Unit Kbps 7/18 ...

Page 8

... ST3243E APPLICATION CIRCUITS REQUIRED MINIMUM CAPACITANCE VALUE ( 3.6 4.5 to 5.5 8/ 0.1 0.047 BYPASS 0.1 0.33 ...

Page 9

... AUTOPOWERDOWN INPUT LEVELS AUTOPOWERDOWN INPUT TIMING ST3243E 9/18 ...

Page 10

... ST3243E DIM. MIN 0.1 b 0. 17.70 E 10. 7.40 L 0.50 S 10/18 SO-28 MECHANICAL DATA mm. TYP MAX. 2.65 0.3 0.49 0.32 0.5 45˚ (typ.) 18.10 10.65 1.27 16.51 7.60 1.27 ˚ (max.) 8 inch MIN. TYP. MAX. 0.104 0.004 0.012 0.014 0.019 0.009 0.012 0.020 0.697 0.713 0.393 0.419 0.050 0.650 0.291 0.300 0.020 0.050 0016023 ...

Page 11

... A2 1.65 b 0.22 c 0.09 D 9 0.65 BSC K 0˚ L 0.55 TYP MAX. MIN. 2 0.002 1.75 1.85 0.065 0.38 0.009 0.25 0.004 10.2 10.5 0.390 7.8 8.2 0.291 5.3 5.6 0.197 10˚ 0.75 0.95 0.022 ST3243E inch TYP. MAX. 0.079 0.069 0.073 0.015 0.010 0.402 0.413 0.307 0.323 0.209 0.220 0.0256 BSC 0˚ 10˚ 0.030 0.037 11/18 ...

Page 12

... ST3243E DIM. MIN 0.05 A2 0.8 b 0.19 c 0.09 D 9.6 E 6 0˚ L 0.45 12/18 TSSOP28 MECHANICAL DATA mm. TYP MAX. 1.2 0.15 1 1.05 0.30 0.20 9.7 9.8 6.4 6.6 4.4 4.48 0.65 BSC 8˚ 0.60 0.75 inch MIN. TYP. MAX. 0.047 0.002 0.004 0.006 0.031 0.039 0.041 0.007 0.012 0.004 0.0079 0.378 0.382 0.386 0.244 0.252 0.260 0.169 0.173 0.176 0.0256 BSC 0˚ ...

Page 13

... Flip-Chip28 MECHANICAL DATA mm. DIM. MIN 0. 0.45 f 0.23 f1 0.80 TYP MAX. MIN. 0.95 22.8 0.24 0.65 0.30 0.35 4.17 156.3 2.5 2.67 97.2 2 0.55 17.7 0.34 0.91 31.5 ST3243E mils TYP. MAX. 37.4 9.4 25.6 9.8 11.8 13.8 164.2 98.4 105.1 78.7 21.7 9.1 13.4 31.8 7385199/A 13/18 ...

Page 14

... ST3243E DIM. MIN 12 10.8 Bo 18.2 Ko 2.9 Po 3.9 P 11.9 14/18 Tape & Reel SO-28 MECHANICAL DATA mm. TYP MAX. 330 13.2 30.4 11.0 18.4 3.1 4.1 12.1 inch MIN. TYP. MAX. 12.992 0.504 0.519 0.795 2.362 1.197 0.425 0.433 0.716 0.724 0.114 0.122 0.153 0.161 0.468 0.476 ...

Page 15

... Tape & Reel SSOP28 MECHANICAL DATA mm. DIM. MIN 12 8.4 Bo 10.7 Ko 2.9 Po 3.9 P 11.9 TYP MAX. MIN. 330 13.2 0.504 0.795 2.362 22.4 8.6 0.331 10.9 0.421 3.1 0.114 4.1 0.153 12.1 0.468 ST3243E inch TYP. MAX. 12.992 0.519 0.882 0.339 0.429 0.122 0.161 0.476 15/18 ...

Page 16

... ST3243E Tape & Reel TSSOP28 MECHANICAL DATA DIM. MIN 12 6.8 Bo 10.1 Ko 1.7 Po 3.9 P 11.9 16/18 mm. TYP MAX. MIN. 330 13.2 0.504 0.795 2.362 22.4 7 0.268 10.3 0.398 1.9 0.067 4.1 0.153 12.1 0.468 inch TYP. MAX. 12.992 0.519 0.882 0.276 0.406 0.075 0.161 0.476 ...

Page 17

... Tape & Reel Flip-Chip28 MECHANICAL DATA mm. DIM. MIN 12 2.6 Bo 4.1 Ko 1.1 Po 3.9 P 3.9 TYP MAX. MIN. 330 13.2 0.504 0.795 2.362 18.4 2.8 0.102 4.3 0.161 1.3 0.043 4.1 0.153 4.1 0.153 ST3243E inch TYP. MAX. 12.992 0.519 0.882 0.110 0.169 0.051 0.161 0.161 17/18 ...

Page 18

... ST3243E Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice ...

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