st3243eb STMicroelectronics, st3243eb Datasheet

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st3243eb

Manufacturer Part Number
st3243eb
Description
?15 Kv Esd Protected 3 To 5.5 V, 400 Kbps, Rs-23 Transceiver With Auto-powerdown
Manufacturer
STMicroelectronics
Datasheet

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Features
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 and enhanced
electrostatic discharge (ESD) protection. All
transmitter outputs and receiver input are
protected to ±8 KV USING IEC 1000-4-2 contact
discharge and ±15 KV 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 3.0 V to 5.5 V supply with a
dual charge pump. The device is guaranteed to
run at data rates of 250kbps while maintaining
RS-232 output levels.
August 2007
ESD protection for RS-232 I/O pins:
– ±8 kV IEC 1000-4-2 contact discharge
– ±15 kV human body model
1 µA supply current achieved when in auto-
powerdown
250 Kbps minimum guaranteed data rate
Guaranteed 6 V/ms slew rate range
Guaranteed mouse driveability
0.1 µF external capacitors
Meet EIA/TIA-232 specifications down to 3 V
Available in SO-28, SSOP-28, TSSOP28 and
flip-chip28 packages
±15 KV ESD protected 3 to 5.5 V, 400 Kbps, RS-232
Rev. 9
transceiver with auto-powerdown
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 1 µA.
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 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.
Flip-Chip28
SSOP
ST3243EB
ST3243EC
TSSOP
SOP
www.st.com
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st3243eb Summary of contents

Page 1

... 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. Rev. 9 ST3243EB ST3243EC SOP TSSOP 1/24 www.st.com 24 ...

Page 2

Contents 1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 3

Pin configuration Figure 1. Pin configuration SOP, SSOP, TSSOP (top view) Flip-chip 6x5 (bottom view, bumps side) 3/24 ...

Page 4

Table 1. Pin description (for SOP, SSOP and TSSOP) Pin n° FORCEOFF 23 FORCEON ...

Page 5

Table 2. Pin description (for Flip-chip) Pin n° FORCEON FORCEOFF Symbol R2 ...

Page 6

Truth tables Table 3. Invalid truth table RS-232 Signal present at any receiver input Table 4. Output control truth table FORCE FORCE Valid receiver level ON OFF YES ...

Page 7

Maximum ratings Table 5. Absolute maximum ratings Symbol V Supply voltage CC V+ Doubled voltage terminal V- Inverted voltage terminal V+ +|V-| FORCEON, FORCEOFF, Input voltage Receiver input voltage range IN T Transmitter output voltage range ...

Page 8

Electrical characteristics Table 7. Electrical characteristics ( 0.1 µF, V Typical values are referred to T Symbol Parameter Supply current auto- I ASHDN powerdown I Supply current SUPPLY I Shutdown supply current SHDN Table 8. Logic ...

Page 9

Table 9. Auto-powerdown electrical characteristics ( 0.1 µF, V Typical values are referred to T Symbol Parameter Receiver input threshold V to INVALID output voltage RITE HIGH (Figure 3.) Receiver input threshold V to INVALID output voltage ...

Page 10

Table 11. Receiver electrical characteristics ( 0.1 µF, V Typical values are referred to T Symbol Parameter Receiver input voltage V RIN operating range RS-232 Input threshold V RIL low RS-232 Input threshold V RIH high V ...

Page 11

Application circuits Figure 2. Application circuits Table 13. Required minimum capacitance value (µ 3.6 4 0.1 0.047 BYPASS 0.1 0.33 11/24 ...

Page 12

Timing diagrams Figure 3. Autopowerdown input levels Figure 4. Autopowerdown input timing 12/24 ...

Page 13

Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® 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 ...

Page 14

Dim. Min 0.1 b 0. 17.70 E 10. 7.40 L 0.50 S 14/24 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 ...

Page 15

SSOP28 mechanical data mm. Dim. Min. Typ 0.050 A2 1.65 1.75 b 0.22 c 0.09 D 9.9 10.2 E 7.4 7 5.3 e 0.65 BSC K 0° L 0.55 0.75 inch. Max. Min. Typ. 2 0.002 ...

Page 16

Dim. Min 0.05 A2 0.8 b 0.19 c 0.09 D 9.6 E 6 0° L 0.45 16/24 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 ...

Page 17

Flip-Chip28 mechanical data mm. Dim. Min. Typ. A 0.83 A1 0.24 A2 0.65 b 0.25 0.30 D 3.97 D1 2 0.45 f 0.23 f1 0.80 Max. Min. 0.95 32.7 0.35 9.8 4.17 156.3 2.67 97.2 2 ...

Page 18

Tape & reel SO-28 mechanical data Dim. Min 12 10.8 Bo 18.2 Ko 2.9 Po 3.9 P 11.9 18/24 mm. Typ. Max. Min. 330 13.2 0.504 0.795 2.362 30.4 11.0 0.425 18.4 ...

Page 19

Tape & reel SSOP28 mechanical data mm. Dim. Min. Typ 12 8.4 Bo 10.7 Ko 2.9 Po 3.9 P 11.9 inch. Max. Min. Typ. 330 13.2 0.504 0.795 2.362 22.4 8.6 0.331 ...

Page 20

Tape & reel TSSOP28 mechanical data Dim. Min 12 6.8 Bo 10.1 Ko 1.7 Po 3.9 P 11.9 20/24 mm. Typ. Max. Min. 330 13.2 0.504 0.795 2.362 22.4 7 0.268 10.3 ...

Page 21

Tape & reel Flip-Chip28 mechanical data mm. Dim. Min. Typ 12 2.6 Bo 4.1 Ko 1.1 Po 3.9 P 3.9 inch. Max. Min. Typ. 330 13.2 0.504 0.795 2.362 18.4 2.8 0.102 ...

Page 22

... ST3243ECPR 0 to 70°C ST3243EBPR -40 to 85°C ST3243ECTR 70°C ST3243EBTR -40 to 85°C ST3243EBJR -40 to 85°C 22/24 Package SO-28 (Tape & Reel) SO-28 (Tape & Reel) SSOP-28 (Tape & Reel) SSOP-28 (Tape & Reel) TSSOP28 (Tape & Reel) TSSOP28 (Tape & Reel) Flip-Chip28 (Tape & ...

Page 23

Revision history Table 15. Revision history Date Revision 21-Jun-2004 6 31-Mar-2006 7 25-Oct-2006 8 24-Aug-2007 9 Changes Page (output leakage current) mA ==> µA L Order codes updated and new template. Order codes updated. Order codes ...

Page 24

... 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. ...

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