View ST324306_1107887.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

ST3243
3 to 5.5V, 400Kbps, RS-232 Transceiver with auto-powerdown
General features
s
1A supply current achieved when in autopowerdown 250kbps minimum guaranteed data rate Guaranteed 6V/s slew rate range Guaranteed mouse drive ability 0.1F external capacitors Meet EIA/TIA-232 specifications down to 3V Available in SO-28, SSOP-28 and TSSOP28
SSOP TSSOP SOP
s s s s s s
Description
The ST3243 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. The receiver R2 is always active to implement a wake-up feature for serial port. The ST3243 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 disabled. If FORCEOFF is set low, both drivers and receivers (expert R2B) are shut off, and supply current is reduced to 1mA. Disconnecting the serial port or turning off the peripheral drives causes the auto-powerdown condition to occur. Auto-powerdown can be disabled when FORCEON and FORCEOFF are high, and should be done when driving a serial mouse. With Autopowerdown 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.
Order code
Part number ST3243CDR ST3243CPR ST3243CTR ST3243BTR Temperature range 0 to 70 C 0 to 70 C 0 to 70 C -40 to 85 C Package SO-28 (Tape & Reel) SSOP-28 (Tape & Reel) TSSOP28 (Tape & Reel) TSSOP28 (Tape & Reel) Comments 1000 parts per reel 1350 parts per reel 2500 parts per reel 2500 parts per reel
March 2006
Rev 7
1/20
www.st.com 20
Contents
ST3243
Contents
1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Truth tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 3 4 5 6 7
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2/20
ST3243
Pin configuration
1
Figure 1.
Pin configuration
Pin configuration
Table 1.
Pin n 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Pin description
Symbol C2+ C2VR1IN R2IN R3IN R4IN R5IN T1OUT T2OUT T3OUT T3IN T2IN T1IN R5OUT R4OUT R3OUT Name and function Positive terminal of inverting charge pump capacitor Negative terminal of inverting charge pump capacitor -5.5V Generated by the charge pump First receiver input voltage Second receiver input voltage Third receiver input voltage Fourth receiver input voltage Fifth receiver input voltage First transmitter output voltage Second transmitter output voltage Third transmitter output voltage Third transmitter input voltage Second transmitter input voltage First transmitter input voltage Fifth receiver output voltage Fourth receiver output voltage Third receiver output voltage 3/20
Pin configuration Table 1.
Pin n 18 19 20 21 22 23 24 25 26 27 28
ST3243
Pin description
Symbol R2OUT R1OUT R2OUTB INVALID FORCEOFF FORCEON C1GND VCC V+ C1+ Name and function Second receiver output voltage First receiver output voltage Non-inverting complementary receiver output, always active for wake-up Output of the valid signal detector. Indicates if a valid RS-232 level is present on receiver inputs logic "1" Drive low to shut down transmitters and on-board power supply. This overrides all automatic circuitry and FORCEON Drive high to override automatic circuitry keeping transmitters on (FORCEOFF must be high) Negative terminal of voltage-charge pump capacitor Ground Supply voltage 5.5V Generated by the charge pump Positive terminal of voltage-charge pump capacitor
1.1
Table 2.
Truth table
FORCE OFF 0 1
TOUT HIGH Z ACTIVE Note:
ROUT HIGH Z ACTIVE Note:
R2OUTB ACTIVE Note: ACTIVE Note:
Note:
If the part is in auto-powerdown mode (FORCE OFF = VCC, FORCE ON = GND) it is shutdown, if no valid RS-232 levels are present on all receiver input
4/20
ST3243
Maximum ratings
2
Table 3.
Symbol VCC V+ VV+ +|V-|
Maximum ratings
Absolute maximum ratings
Parameter Supply voltage Doubled voltage terminal Inverted voltage terminal Value -0.3 to 6 (VCC -0.3) to 7 0.3 to -7 13 -0.3 to 6 25 13.2 -0.3 to (VCC + 0.3) Continuous -65 to 150 C Unit V V V V V V V V
FORCEON, Input voltage FORCEOFF, TIN RIN TOUT ROUT ROUTB INVALID tSHORT Tstg Receiver input voltage range Transmitter output voltage range Receiver output voltage range Short circuit duration on TOUT (one at a time) Storage temperature range
Note:
1
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. V+ and V- can have a maximum magnitude of +7V, but their absolute addition can not exceed 13 V. The device doesn't meet 1KV ESD HBM
2
5/20
Electrical characteristics
ST3243
3
Electrical characteristics
Typical values are referred to TA = 25C
Table 4.
Symbol IASHDN ISHDN
Electrical characteristics (C1 - C4 = 0.1F, VCC = 3V to 5.5V, TA = -40 to 85C, unless otherwise specified.
Parameter Supply current auto-powerdown Shutdown supply current Supply current auto-powerdown disabled Test Conditions VCC = 3.3 or 5.0V, TA = 25C All R_IN open, FORCEOFF = VCC VCC = 3.3 or 5.0V, TA = 25C All R_IN open, FORCEOFF = GND VCC = 3.3 or 5.0V TA = 25C FORCEON = FORCEOFF = VCC No Load Min. Typ. 1 1 Max. 10 10 Unit A A
ISHDN
0.3
1
mA
Table 5.
Symbol VTIL VTIH VTHYS IIL IOL VOL VOH
Logic input electrical characteristics (C1 - C4 = 0.1F, VCC = 3V to 5.5V, TA = -40 to 85C, unless otherwise specified.
Parameter Input logic threshold low Input logic threshold high Transmitter input hysteresis Input leakage current Output leakage current Output voltage low Output voltage high T-IN, FORCEON, FORCEOFF Receiver Disabled IOUT = 1.6mA IOUT = -1mA VCC-0.6 VCC-0.1 Test Conditions T-IN, FORCEON, FORCEOFF T-IN, FORCEON, FORCEOFF VCC = 3.3V VCC = 5V 2 2.4 0.5 0.01 0.05 1.0 10 0.4 Min. Typ. Max. 0.8 Unit V V V V A A V V
6/20
ST3243
Electrical characteristics
Table 6.
Symbol VRITE VRITD VIOL VIOH tWU tinvh tinvL
Auto-powerdown electrical characteristics (C1 - C4 = 0.1F, VCC = 3V to 5.5V, TA = -40 to 85C, unless otherwise specified.
Parameter Receiver input threshold to transmitter enabled Receiver input threshold to transmitter disabled INVALID Output voltage LOW INVALID Output voltage HIGH Receiver threshold to transmitter enabled Receiver positive or negative threshold to INVALID HIGH Receiver positive or negative threshold to INVALID LOW IOUT = 1.6mA IOUT = -1mA VCC-0.6 250 1 30 Test Conditions Positive threshold Negative threshold 1A Supply Current Min. 2.7 -0.3 0.3 0.4 Typ. Max. 2.7 Unit V V V V V ms ms ms
Table 7.
Symbol VTOUT ROUT ISC
Transmitter electrical characteristics (C1 - C4 = 0.1F, VCC = 3V to 5.5V, TA = -40 to 85C, unless otherwise specified.
Parameter Output voltage swing Output Resistance Output short circuit current T1IN = T2IN = GND, T3IN = VCC T3OUT loaded with 3K to GND T1OUT and T2OUT loaded with 2.5mA each Test Conditions All transmitter outputs are loaded with 3K to GND VCC = V+ = V- = 0V, VOUT = 2V Min. 5 300 Typ. 5.4 10M 35 5 60 Max. Unit V mA
VOT
Transmitter output voltage
V
Table 8.
Symbol VRIN VRIL VRIH VRIHYS RRIN
Receiver electrical characteristics (C1 - C4 = 0.1F, VCC = 3V to 5.5V, TA = -40 to 85C, unless otherwise specified.
Parameter Receiver input voltage operating range RS-232 Input threshold low RS-232 Input threshold high Input hysteresis Input resistance TA = 25C 3 TA = 25C, VCC = 3.3V TA = 25C, VCC = 5.0V TA = 25C, VCC = 3.3V TA = 25C, VCC = 5.0V Test Conditions Min. -25 0.6 0.8 1.2 1.2 1.5 1.8 0.5 5 7 2.4 2.4 Typ. Max. 25 Unit V V V V K
7/20
Electrical characteristics Table 9.
Symbol DR tPHL tPLH tT_SKEW
ST3243
Timing characteristics (C1 - C4 = 0.1F, VCC = 3V to 5.5V, TA = -40 to 85C, unless otherwise specified.
Parameter Maximum data rate Test Conditions RL = 3K, CL= 1000pF one transmitter switching Min. 250 Typ. 400 0.15 100 50 1 Max. Unit Kbps s ns ns ms
Receiver propagation delay RIN to ROUT, CL = 150pF Transmitter skew
tR_SKEW Receiver skew tINVH Receiver positive or negative threshold to INVALID HIGH Receiver positive or negative threshold to INVALID LOW TA = 25C RL = 3K to 7K VCC = 3.3V measured from +3V to -3V or -3V to +3V CL = 150pF to 1000pF CL = 150pF to 2500pF
tINVL
30
ms
SRT
Transition slew rate
6 4
30 30
V/s V/s
8/20
ST3243
Application circuits
4
Figure 2.
Application circuits
Application circuits
Table 10.
VCC
Capacitance value (F)
C1 0.1 0.047 0.22 C2 0.1 0.33 1.0 C3 0.1 0.33 1.0 C4 0.1 0.33 1.0 Cbypass 0.1 0.33 0.22 9/20
3.0 to 3.6 4.5 to 5.5 3.0 to 5.5
Typical performance characteristics
ST3243
5
Typical performance characteristics
Unless otherwise specified Tj = 25C
Figure 3.
Invalid high threshold time
Figure 4.
Invalid low threshold time
Figure 5.
Receiver propagation delay
Figure 6.
Receiver output enable & disable time
10/20
ST3243 Figure 7. Output current vs output high voltage Figure 8.
Typical performance characteristics Output current vs output low voltage
11/20
Package mechanical data
ST3243
6
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com
12/20
ST3243
Package mechanical data

SO-28 MECHANICAL DATA
mm. DIM. MIN. A a1 b b1 C c1 D E e e3 F L S 7.40 0.50 17.70 10.00 1.27 16.51 7.60 1.27 0.291 0.020 18.10 10.65 0.1 0.35 0.23 0.5 45 (typ.) 0.697 0.393 0.050 0.650 0.300 0.050

inch MAX. 2.65 0.3 0.49 0.32 0.004 0.014 0.009 0.020 MIN. TYP. MAX. 0.104 0.012 0.019 0.012
TYP
0.713 0.419
8 (max.)
0016023
13/20
Package mechanical data
ST3243
SSOP28 MECHANICAL DATA
mm. DIM. MIN. A A1 A2 b c D E E1 e K L 0 0.55 0.75 0.050 1.65 0.22 0.09 9.9 7.4 5 10.2 7.8 5.3 0.65 BSC 10 0.95 0 0.022 0.030 1.75 1.85 0.38 0.25 10.5 8.2 5.6 TYP MAX. 2 0.002 0.065 0.009 0.004 0.390 0.291 0.197 0.402 0.307 0.209 0.0256 BSC 10 0.037 0.069 0.073 0.015 0.010 0.413 0.323 0.220 MIN. TYP. MAX. 0.079 inch
14/20
ST3243
Package mechanical data
TSSOP28 MECHANICAL DATA
mm. DIM. MIN. A A1 A2 b c D E E1 e K L 0 0.45 0.05 0.8 0.19 0.09 9.6 6.2 4.3 9.7 6.4 4.4 0.65 BSC

inch MAX. 1.2 0.15 0.002 0.031 0.007 0.004 0.378 0.244 0.169 0.382 0.252 0.173 0.0256 BSC 8 0.75 0 0.018

TYP
MIN.
TYP.
MAX. 0.047
0.004 0.039
0.006 0.041 0.012 0.0079 0.386 0.260 0.176
1
1.05 0.30 0.20 9.8 6.6 4.48
8 0.030
0.60
0.024
0128292B
15/20
Package mechanical data
ST3243
Tape & Reel SO-28 MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 10.8 18.2 2.9 3.9 11.9 12.8 20.2 60 30.4 11.0 18.4 3.1 4.1 12.1 0.425 0.716 0.114 0.153 0.468 TYP MAX. 330 13.2 0.504 0.795 2.362 1.197 0.433 0.724 0.122 0.161 0.476 MIN. TYP. MAX. 12.992 0.519 inch
16/20
ST3243
Package mechanical data
Tape & Reel SSOP28 MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 8.4 10.7 2.9 3.9 11.9 12.8 20.2 60 22.4 8.6 10.9 3.1 4.1 12.1 0.331 0.421 0.114 0.153 0.468 TYP MAX. 330 13.2 0.504 0.795 2.362 0.882 0.339 0.429 0.122 0.161 0.476 MIN. TYP. MAX. 12.992 0.519 inch
17/20
Package mechanical data
ST3243
Tape & Reel TSSOP28 MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 6.8 10.1 1.7 3.9 11.9 12.8 20.2 60 22.4 7 10.3 1.9 4.1 12.1 0.268 0.398 0.067 0.153 0.468 TYP MAX. 330 13.2 0.504 0.795 2.362 0.882 0.276 0.406 0.075 0.161 0.476 MIN. TYP. MAX. 12.992 0.519 inch
18/20
ST3243
Revision history
7
Table 11.
Date
Revision history
Revision history
Revision 6 7 Document updating. Order codes has been updated and new template. Changes
19-Sep-2004 31-Mar-2006
19/20
ST3243
Please Read Carefully:
Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries ("ST") reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST's terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein.
UNLESS OTHERWISE SET FORTH IN ST'S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZE REPRESENTATIVE OF ST, ST PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS, WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE.
Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST.
ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners.
(c) 2006 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com
20/20

▲Up To Search▲

Price & Availability of ST324306

	To Download ST324306 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .