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RS-232
+/- 15 kV ESD protected, 3 to 5.5 V low power, up to 250 Kbps, RS-232 drivers and receivers
Datasheet
Format:
(677 kb)
or
(13 kb)
Last Updated: 22/01/2008
Pages: 15
Untitled Document
Generic Part Number
Orderable Part Number
Status
ST3222EB
ST3222EBPR
Active
ST3222EBTR
Active
ST3222EC
ST3222ECTR
Active
ST3222ECPR
Active
Related Information
Additional Information: ST3232E -±15KV ESD Protected, 3.0V to 5.5, Low Power 250kbps, RS232 Drivers/Receivers
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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 A supply current 250KBps minimum guarantee data rate 6 V/s minimum guarantee slew rate Meet EIA/TIA-232 specification down to 3 V Available in SSOP20 and TSSOP20
TSSOP SSOP
Description
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. Device summary
Temperature range 0 to 70 C -40 to 85 C 0 to 70 C -40 to 85 C Package
Typical applications are Notebook, Sub-notebook and Palmtop Computers, Battery Powered Equipment, Hand-Held Equipment, Peripherals and Printers.
Order codes ST3222ECPR ST3222EBPR ST3222ECTR ST3222EBTR January 2008
Packaging 1350 parts per reel 1350 parts per reel 2500 parts per reel 2500 parts per reel 1/15
www.st.com 15
SSOP20 (tape and reel) SSOP20 (tape and reel) TSSOP20 (tape and reel) TSSOP20 (tape and reel) Rev 8
Contents
ST3222E
Contents
1 2 3 4 5 6 7 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
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ST3222E
Pin configuration
1
Figure 1.
Pin configuration
Pin connection
Table 2.
Pin n 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Pin description
Symbol EN C1+ V+ C1C2+ C2VT2OUT R2IN R2OUT NC T2IN T1IN NC R1OUT R1IN T1OUT GND VCC SHDN Name and function Receiver enable control. drive low for normal operation. Drive high to force the receivers outputs (R_OUT) into a high-impedance state. Positive terminal for the first charge pump capacitor 5.5V Generated by the charge pump. Negative terminal for the first charge pump capacitor Positive terminal for the second charge pump capacitor Negative terminal for the second charge pump capacitor -5.5V Generated by the charge pump. Second transmitter output voltage Second receiver input voltage Second receiver output voltage Not connected Second transmitter input voltage First transmitter input voltage Not connected First receiver output voltage First receiver input voltage First transmitter output voltage Ground Supply voltage Active low shutdown control input. drive low to shut-down transmitter and charge pump 3/15
Absolute maximum ratings
ST3222E
2
Table 3.
Symbol VCC V+ VV+ +|V-| TIN RIN TOUT ROUT tSHORT
Absolute maximum ratings
Absolute maximum ratings
Parameter Supply voltage Doubled voltage terminal Inver ted voltage terminal Value -0.3 to 6 (VCC - 0.3) to 7 0.3 to -7 13 Transmitter input voltage range Receiver input voltage range Transmitter output voltage range Receiver output voltage range Transmitter output short to gnd time -0.3 to 6 25 13.2 -0.3 to (VCC + 0.3) Continuous Unit V V V V V V V V
Note:
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. Star tup 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.
Shutdown and enable control truth table
SHDN 0 0 1 1 EN 0 1 0 1 T-OUT High Z High Z Active Active R-OUT Active High Z Active High Z
Table 5.
Symbol ESD ESD
ESD performance: transmitter outputs, receiver inputs
Parameter ESD protection voltage ESD protection voltage Test conditions Human body model IEC-1000-4-2 Min. 15 8 Typ. Max. Unit kV kV
4/15
ST3222E
Electrical characteristics
3
Table 6.
Symbol ISUPPLY ISHDN
Electrical characteristics
Electrical characteristics (C1 - C4 = 0.1 F, 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. 0.3 1 Ma x . 1 10 Unit mA A
VCC power supply current No load, SHDN = VCC, TA = 25C Shutdown supply current No load, SHDN = VCC, TA = 25C
Table 7.
Symbol VIL VIH VHYS IIL
Logic input electrical characteristics (C1 - C4 = 0.1 F, VCC = 3 V to 5.5 V, TA = -40 to 85 C, unless otherwise specified. Typical values are referred to TA = 25 C)
Parameter Input logic threshold low Input logic threshold high Transmitter input hysteresis Input leakage current T-IN, EN, SHDN Test conditions T-IN, EN, SHDN (Note: 1) VCC = 3.3 V VCC = 5 V 2 V 2.4 0.25 0.01 1 V A Min. Typ. Max. 0.8 Unit V
Note: Table 8.
1
Transmitter input hysteresis is typically 250 mV Transmitter electrical characteristics (C1 - C4 = 0.1 F VCC = 3 V to 5.5 V, TA = -40 to 85 C, unless otherwise specified. Typical values are referred to TA = 25 C)
Parameter Output voltage swing Transmitter output resistance Output short circuit current Output leakage current VCC = 0 or 3 V to 3.6 V, VOUT = 12 V Transmitters disable Test conditions All transmitter outputs are loaded with 3 K to GND VCC = V+ = V- = 0 V, VOUT = 2 V Min. 5 300 Typ. 5.4 10M 60 25 Max. Unit V mA A
Symbol VTOUT RTOUT ITSC ITOL
5/15
Electrical characteristics
ST3222E
Table 9.
Symbol IOL VRIN VRIL
Receiver electrical characteristics (C1 - C4 = 0.1 F, VCC = 3 V to 5.5 V, TA = -40 to 85 C, unless otherwise specified. Typical values are referred to TA = 25 C)
Parameter Output leakage current Receiver input voltage operating range Input threshold low TA = 25C, VCC = 3.3 V TA = 25C, VCC = 5 V Input threshold high Input hysteresis Input resistance Output voltage low Output voltage high TA = 25C IOUT = 1.6 mA IOUT = -1 mA VCC-0.6 VCC0.1 3 TA = 25C, VCC = 3.3 V TA = 25C, VCC = 5 V Test conditions R-OUT, EN = VCC, receiver disabled -25 0.6 0.8 1.2 V 1.5 1.5 1.8 0.5 5 7 0.4 2.4 V 2.4 V K V V Min. Typ. 0.05 Max. 10 25 Unit A V
VRIH VRIHYS RRIN VROL VROH
Table 10.
Symbol DR tPHLR tPLHR |tPHLT - tTHL| tOER tODR |tPHLR - tTHR|
Timing characteristics (C1 - C4 = 0.1 F, 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 K CL2= 1000 pF one transmitter switching Min. 250 0.15 200 Normal operation Normal operation 50 50 50 TA = 25C RL = 3 K to 7 K VCC = 3.3 V measured from +3V to -3V or -3V to +3V CL = 150 pF to 1000 pF TA = 25C RL = 3 K to 7 K VCC = 3.3 V measured from +3V to -3V or -3V to +3V CL = 150 pF to 2500 pF Typ. Max. Unit Kbps s ns ns ns ns
Propagation delay input to RXIN to RXOUT, CL = 150 pF output Transmitter propagation delay difference (1) Receiver output enable time Receiver output disable time Receiver propagation delay difference
6
30
V/s
SRT
Transition slew rate
4
30
V/s
1. Transmitter Skew is measured at the transmitter zero cross points
6/15
ST3222E
Application circuits
4
Figure 2.
Application circuits
Application schematic
Table 11.
VCC
Capacitance value (F)
C1 0.1 0.047 0.22 C2 0.1 0.33 0.1 C3 0.1 0.33 0.1 C4 0.1 0.33 0.1 Cbypass 0.1 0.33 0.22
3.0 to 3.6 4.5 to 5.5 3.0 to 5.5
7/15
Typical performance characteristics
ST3222E
5
Figure 3.
Typical performance characteristics
(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
Figure 6.
Output current vs output low voltage
Figure 7.
Voltage transfer characteristics for Figure 8. transmitter inputs
Receiver input resistance
8/15
ST3222E
Package mechanical data
6
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. Dim. Min. A A1 A2 b c D E E1 e K L 0 0.55 0.05 1.65 0.22 0.09 6.9 7.4 5 7.2 7.8 5.3 0.65 BSC 4 0.75 8 0.95 0 0.022 1.75 1.85 0.38 0.25 7.5 8.2 5.6 Typ. Max. 2 0.002 0.065 0.009 0.004 0.272 0.291 0.197 0.283 0.307 0.209 0.0256 BSC 4 0.030 8 0.037 0.069 0.073 0.015 0.010 0.295 0.323 0.220 Min. Typ. Max. 0.079 inch.
A
A2 A1 b e K c L E
D
E1
PIN 1 IDENTIFICATION
1
0061436C
10/15
ST3222E
Package mechanical data
TSSOP20 mechanical data
mm. Dim. Min. A A1 A2 b c D E E1 e K L 0 0.45 0.60 0.05 0.8 0.19 0 .09 6.4 6.2 4.3 6.5 6.4 4.4 0.65 BSC 8 0.75 0 0.018 0.024 1 Typ. Max. 1 .2 0.15 1.05 0.30 0.20 6.6 6.6 4.48 0.002 0.031 0.007 0.004 0.252 0.244 0.169 0.256 0.252 0.173 0.0256 BSC 8 0.030 0.004 0.039 Min. Typ. Max. 0.047 0.006 0.041 0.012 0.0079 0.260 0.260 0.176 inch.
A
A2 A1 b e K c L E
D
E1
PIN 1 IDENTIFICATION
1
0087225C
11/15
Package mechanical data
ST3222E
Tape & reel SSOP20 mechanical data
mm. Dim. Min. A C D N T Ao Bo Ko Po P 8.4 7.7 2.9 3.9 11.9 12.8 20.2 60 22.4 8 .6 7.9 3 .1 4.1 12.1 0.331 0.303 0.114 0.153 0.468 Typ. Max. 330 13.2 0.504 0.795 2 .362 0.882 0.339 0.311 0.122 0.161 0.476 Min. Typ. Max. 12.992 0.519 inch.
12/15
ST3222E
Package mechanical data
Tape & reel TSSOP20 mechanical data
mm. Dim. Min. A C D N T Ao Bo Ko Po P 6.8 6.9 1.7 3.9 11.9 12.8 20.2 60 22.4 7 7.1 1.9 4.1 12.1 0.268 0.272 0.067 0.153 0.468 Typ. Max. 330 13.2 0.504 0.795 2 .362 0.882 0.276 0.280 0.075 0.161 0.476 Min. Typ. Max. 12.992 0.519 inch.
13/15
Revision history
ST3222E
7
Table 12.
Date
Revision history
Document revision history
Revision 6 7 8 Order codes updated. Added Table 1 in cover page. Added note on Table 3. Changes
22-Mar-2006 23-Aug-2007 21-Jan-2008
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ST3222E
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Document Number: 8786
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