STMICROELECTRONICS ST3222ECPR

ST3222EB
ST3222EC
± 15 kV ESD protected, 3 to 5.5 V
low power, up to 250 Kbps, RS-232 drivers and receivers
Features
■
ESD protection for RS-232 I/O pins ± 15 kV
human body model, ± 8 kV IEC 1000-4-2
contact discharge
■
300 µA supply current
■
250KBps minimum guarantee data rate
■
6 V/µs minimum guarantee slew rate
■
Meet EIA/TIA-232 specification down to 3 V
■
Available in SSOP20 and TSSOP20
TSSOP
Description
Typical applications are Notebook, Sub-notebook
and Palmtop Computers, Battery Powered
Equipment, Hand-Held Equipment, Peripherals
and Printers.
The ST3222E is a 3 V powered EIA/TIA-232 and
V.28/V.24 communications interface with low
power requirements, high data-rate capabilities
and enhanced electrostatic discharge (ESD)
protection to ± 8 kV using IEC1000-4-2 Contact
Discharge and ±15 kV using the Human Body
Model. ST3222E has a proprietary low dropout
transmitter output stage providing true RS-232
performance from 3 to 5 V supplies with a dual
charge pump. The charge pump requires only four
small 0.1 mF external capacitors for operation
form 3 V supply. The device has two receivers and
two drivers. The ST3222E features a 1 mA
shutdown mode that reduces power consumption
and extends battery life in portable systems. Its
receivers can remain active in shutdown mode,
allowing external devices such as modems to be
monitored using only 1 mA supply current. The
device is guaranteed to run at data rates of 250
Kbps while maintaining RS-232 output levels.
Table 1.
SSOP
Device summary
Order codes
Temperature
range
Package
Packaging
ST3222ECPR
0 to 70 °C
SSOP20 (tape and reel)
1350 parts per reel
ST3222EBPR
-40 to 85 °C
SSOP20 (tape and reel)
1350 parts per reel
ST3222ECTR
0 to 70 °C
TSSOP20 (tape and reel)
2500 parts per reel
ST3222EBTR
-40 to 85 °C
TSSOP20 (tape and reel)
2500 parts per reel
January 2008
Rev 8
1/15
www.st.com
15
Contents
ST3222E
Contents
1
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5
Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2/15
ST3222E
Pin configuration
1
Pin configuration
Figure 1.
Pin connection
Table 2.
Pin description
Pin n°
Symbol
Name and function
1
EN
Receiver enable control. drive low for normal operation. Drive high to force the
receivers outputs (R_OUT) into a high-impedance state.
2
C1+
Positive terminal for the first charge pump capacitor
3
V+
5.5V Generated by the charge pump.
4
C1-
Negative terminal for the first charge pump capacitor
5
C2+
Positive terminal for the second charge pump capacitor
6
C2-
Negative terminal for the second charge pump capacitor
7
V-
-5.5V Generated by the charge pump.
8
T2OUT
9
R2IN
10
R2OUT
11
NC
Not connected
12
T2IN
Second transmitter input voltage
13
T1IN
First transmitter input voltage
14
NC
Not connected
15
R1OUT
16
R1IN
17
T1OUT
18
GND
Ground
19
VCC
Supply voltage
20
SHDN
Second transmitter output voltage
Second receiver input voltage
Second receiver output voltage
First receiver output voltage
First receiver input voltage
First transmitter output voltage
Active low shutdown control input. drive low to shut-down transmitter and charge pump
3/15
Absolute maximum ratings
ST3222E
2
Absolute maximum ratings
Table 3.
Absolute maximum ratings
Symbol
Parameter
Value
Unit
-0.3 to 6
V
VCC
Supply voltage
V+
Doubled voltage terminal
(VCC - 0.3) to 7
V
V-
Inverted voltage terminal
0.3 to -7
V
13
V
-0.3 to 6
V
± 25
V
± 13.2
V
-0.3 to (VCC + 0.3)
V
V+ +|V-|
TIN
Transmitter input voltage range
RIN
Receiver input voltage range
TOUT
Transmitter output voltage range
ROUT
Receiver output voltage range
tSHORT
Note:
Transmitter output short to gnd time
Continuous
Absolute maximum ratings are those values beyond which damage to the device may
occur. Functional operation under these condition is not implied.
Externally applied V+ and V- can have a maximum magnitude of +7 V, but their absolute
addition can not exceed 13 V.
Running on internal charge pump, intrinsic self limitation allows exceeding those values
without any damage.
Startup voltage sequence (VCC, then V+, then V-) is critical, therefore it is not recommended
to use this device using externally applied voltage to V+ and V-.
Table 4.
Table 5.
Symbol
Shutdown and enable control truth table
SHDN
EN
T-OUT
R-OUT
0
0
High Z
Active
0
1
High Z
High Z
1
0
Active
Active
1
1
Active
High Z
ESD performance: transmitter outputs, receiver inputs
Parameter
Test conditions
Min.
Typ.
Max.
Unit
ESD
ESD protection voltage
Human body model
±15
kV
ESD
ESD protection voltage
IEC-1000-4-2
±8
kV
4/15
ST3222E
Electrical characteristics
3
Electrical characteristics
Table 6.
Electrical characteristics (C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless
otherwise specified. Typical values are referred to TA = 25 °C)
Symbol
ISUPPLY
Parameter
Table 7.
No load, SHDN = VCC, TA = 25°C
Typ.
Max.
Unit
0.3
1
mA
1
10
µA
Logic input electrical characteristics (C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V,
TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C)
Symbol
Parameter
VIL
Input logic threshold low
VIH
Input logic threshold high
Test conditions
Min.
VCC = 3.3 V
Input leakage current
1
Table 8.
Symbol
Max.
Unit
0.8
V
2
V
2.4
Transmitter input
hysteresis
IIL
Typ.
T-IN, EN, SHDN (Note: 1)
VCC = 5 V
VHYS
Note:
Min.
VCC power supply current No load, SHDN = VCC, TA = 25°C
Shutdown supply current
ISHDN
Test conditions
0.25
± 0.01
T-IN, EN, SHDN
V
±1
µA
Transmitter input hysteresis is typically 250 mV
Transmitter electrical characteristics (C1 - C4 = 0.1 µF VCC = 3 V to 5.5 V,
TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C)
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VTOUT
Output voltage swing
All transmitter outputs are loaded with
3 KΩ to GND
±5
± 5.4
V
RTOUT
Transmitter output
resistance
VCC = V+ = V- = 0 V, VOUT = ± 2 V
300
10M
Ω
ITSC
Output short circuit
current
± 60
mA
ITOL
Output leakage current
VCC = 0 or 3 V to 3.6 V, VOUT = ± 12 V
Transmitters disable
± 25
µA
5/15
Electrical characteristics
Table 9.
Symbol
ST3222E
Receiver electrical characteristics (C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V,
TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C)
Parameter
IOL
Output leakage current
VRIN
Receiver input voltage
operating range
VRIL
Input threshold low
VRIH
Input threshold high
Test conditions
R-OUT, EN = VCC, receiver disabled
Unit
± 0.05
± 10
µA
25
V
0.6
1.2
TA = 25°C, VCC = 5 V
0.8
1.5
V
TA = 25°C, VCC = 3.3 V
1.5
2.4
TA = 25°C, VCC = 5 V
1.8
2.4
RRIN
Input resistance
TA = 25°C
VROL
Output voltage low
IOUT = 1.6 mA
VROH
Output voltage high
IOUT = -1 mA
DR
Max.
TA = 25°C, VCC = 3.3 V
Input hysteresis
Symbol
Typ.
-25
VRIHYS
Table 10.
Min.
V
0.5
3
VCC-0.6
5
V
7
KΩ
0.4
V
VCC0.1
V
Timing characteristics (C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless
otherwise specified. Typical values are referred to TA = 25 °C)
Parameter
Data transfer rate
Test conditions
RL = 3 KΩ, CL2= 1000 pF
one transmitter switching
Min.
Typ.
Max.
250
Unit
Kbps
tPHLR
tPLHR
Propagation delay input to
RXIN to RXOUT, CL = 150 pF
output
0.15
µs
|tPHLT
- tTHL|
Transmitter propagation
delay difference (1)
200
ns
tOER
Receiver output enable
time
Normal operation
50
ns
tODR
Receiver output disable
time
Normal operation
50
ns
50
ns
|tPHLR
- tTHR|
SRT
Receiver propagation
delay difference
Transition slew rate
TA = 25°C RL = 3 KΩ to 7 KΩ
VCC = 3.3 V
measured from +3V to -3V or -3V to +3V
CL = 150 pF to 1000 pF
6
30
V/µs
TA = 25°C RL = 3 KΩ to 7 KΩ
VCC = 3.3 V
measured from +3V to -3V or -3V to +3V
CL = 150 pF to 2500 pF
4
30
V/µs
1. Transmitter Skew is measured at the transmitter zero cross points
6/15
ST3222E
Application circuits
4
Application circuits
Figure 2.
Application schematic
Table 11.
Capacitance value (µF)
VCC
C1
C2
C3
C4
Cbypass
3.0 to 3.6
0.1
0.1
0.1
0.1
0.1
4.5 to 5.5
0.047
0.33
0.33
0.33
0.33
3.0 to 5.5
0.22
0.1
0.1
0.1
0.22
7/15
Typical performance characteristics
ST3222E
5
Typical performance characteristics
Figure 3.
(unless otherwise specified TJ = 25 °C)
Output current vs output high
Figure 4.
voltage
Output current vs output high
voltage
Figure 5.
Output current vs output low
voltage
Output current vs output low
voltage
Figure 7.
Voltage transfer characteristics for Figure 8.
transmitter inputs
8/15
Figure 6.
Receiver input resistance
ST3222E
6
Package mechanical data
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 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
9/15
Package mechanical data
ST3222E
SSOP20 mechanical data
mm.
inch.
Dim.
Min.
Typ.
Max.
A
Min.
Typ.
Max.
2
A1
0.05
A2
1.65
b
0.079
0.002
1.75
1.85
0.065
0.22
0.38
0.009
0.015
c
0.09
0.25
0.004
0.010
D
6.9
7.2
7.5
0.272
0.283
0.295
E
7.4
7.8
8.2
0.291
0.307
0.323
E1
5
5.3
5.6
0.197
0.209
0.220
e
0.069
0.65 BSC
0.073
0.0256 BSC
K
0°
4°
8°
0°
4°
8°
L
0.55
0.75
0.95
0.022
0.030
0.037
A
A2
A1
b
K
e
L
E
c
D
E1
PIN 1 IDENTIFICATION
1
0061436C
10/15
ST3222E
Package mechanical data
TSSOP20 mechanical data
mm.
inch.
Dim.
Min.
Typ.
Max.
A
Min.
Typ.
Max.
1.2
A1
0.05
A2
0.8
b
0.047
0.15
0.002
0.004
0.006
1.05
0.031
0.039
0.041
0.19
0.30
0.007
0.012
c
0.09
0.20
0.004
0.0079
D
6.4
6.5
6.6
0.252
0.256
0.260
E
6.2
6.4
6.6
0.244
0.252
0.260
E1
4.3
4.4
4.48
0.169
0.173
0.176
1
e
0.65 BSC
K
0°
L
0.45
A
0.0256 BSC
0.60
8°
0°
0.75
0.018
8°
0.024
0.030
A2
A1
b
K
e
L
E
c
D
E1
PIN 1 IDENTIFICATION
1
0087225C
11/15
Package mechanical data
ST3222E
Tape & reel SSOP20 mechanical data
mm.
inch.
Dim.
Min.
A
Max.
Min.
330
13.2
Typ.
Max.
12.992
C
12.8
D
20.2
0.795
N
60
2.362
T
12/15
Typ.
0.504
22.4
0.519
0.882
Ao
8.4
8.6
0.331
0.339
Bo
7.7
7.9
0.303
0.311
Ko
2.9
3.1
0.114
0.122
Po
3.9
4.1
0.153
0.161
P
11.9
12.1
0.468
0.476
ST3222E
Package mechanical data
Tape & reel TSSOP20 mechanical data
mm.
inch.
Dim.
Min.
A
Typ.
Max.
Min.
330
Max.
12.992
C
12.8
D
20.2
0.795
N
60
2.362
T
13.2
Typ.
0.504
22.4
0.519
0.882
Ao
6.8
7
0.268
0.276
Bo
6.9
7.1
0.272
0.280
Ko
1.7
1.9
0.067
0.075
Po
3.9
4.1
0.153
0.161
P
11.9
12.1
0.468
0.476
13/15
Revision history
ST3222E
7
Revision history
Table 12.
Document revision history
Date
Revision
22-Mar-2006
6
Order codes updated.
23-Aug-2007
7
Added Table 1 in cover page.
21-Jan-2008
8
Added note on Table 3.
14/15
Changes
ST3222E
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 AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT
RECOMMENDED, 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. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE
GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK.
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.
© 2008 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
15/15