STMICROELECTRONICS ST3241ECDR

ST3241E
±15KV ESD PROTECTED 3 TO 5.5V, 400KBPS,
RS-232 TRANSCEIVER WITH AUTO-POWERDOWN
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ESD PROTECTION FOR RS-232 I/O PINS:
±8KV IEC 1000-4-2 CONTACT DISCHARGE
±15KV HUMAN BODY MODEL
1µA SUPPLY CURRENT ACHIEVED WHEN
IN AUTO-POWERDOWN
250Kbps MINIMUM GUARANTEED DATA
RATE
GUARANTEED 6V/µs SLEW RATE RANGE
GUARANTEED MOUSE DRIVEABILITY
0.1µF EXTERNAL CAPACITORS
MEET EIA/TIA-232 SPECIFICATIONS DOWN
TO 3V
AVAILABLE IN SO-28, SSOP28 AND
TSSOP28 PACKAGES
DESCRIPTION
The ST3241E 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 comunication standards providing high
data rate capability and enhanced electrostatic
discharge (ESD) protection. All transmitter outputs
and receiver input are 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 ST3241E 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.
October 2002
SOP
SSOP
TSSOP
It is a complete serial port (3 drivers, 5 receivers)
intended for notebook or subnotebook computers.
Receivers R1 and R2 have extra outputs in
addition to their standard outputs. These extra
outputa are always active.
Typical application are in notebook, subnotebook,
palmtop computers, battery-powered equipment,
hand-held equipment, peripherals and printers.
1/10
ST3241E
ORDERING CODES
Type
Temperature
Range
Package
Comments
ST3241ECD
ST3241EBD
ST3241ECDR
ST3241EBDR
ST3241ECPR
ST3241EBPR
ST3241ECTR
ST3241EBTR
0 to 70 °C
-40 to 85 °C
0 to 70 °C
-40 to 85 °C
0 to 70 °C
-40 to 85 °C
0 to 70 °C
-40 to 85 °C
SO-28 (Tube)
SO-28 (Tube)
SO-28 (Tape & Reel)
SO-28 (Tape & Reel)
SSOP-28 (Tape & Reel)
SSOP-28 (Tape & Reel)
TSSOP28 (Tape & Reel)
TSSOP28 (Tape & Reel)
27parts per tube / 12tube per box
27parts per tube / 12tube per box
1000 parts per reel
1000 parts per reel
1350 parts per reel
1350 parts per reel
2500 parts per reel
2500 parts per reel
PIN DESCRIPTION
2/10
PlN N°
SYMBOL
NAME AND FUNCTION
1
C2+
Positive Terminal of Inverting Charge Pump Capacitor
2
C2-
Negative Terminal of Inverting Charge Pump Capacitor
3
4
VR1IN
-5.5V Generated by the Charge Pump
First Receiver Input Voltage
5
R2IN
Second Receiver Input Voltage
6
R3IN
Third Receiver Input Voltage
7
R4IN
Fourth Receiver Input Voltage
8
R5IN
Fifth Receiver Input Voltage
9
T1OUT
First Transmitter Output Voltage
10
T2OUT
Second Transmitter Output Voltage
Third Transmitter Output Voltage
11
T3OUT
12
T3IN
Third Transmitter Input Voltage
13
T2IN
Second Transmitter Input Voltage
14
T1IN
First Transmitter Input Voltage
15
R5OUT
Fifth Receiver Output Voltage
16
R4OUT
Fourth Receiver Output Voltage
17
R3OUT
Third Receiver Output Voltage
18
R2OUT
Second Receiver Output Voltage
19
R1OUT
First Receiver Output Voltage
20
R2OUTB
21
R1OUTB
22
23
24
SHDN
EN
C1-
Non-inverting Complementary Receiver Output, always active
for wake-up
Non-inverting Complementary Receiver Output, always active
for wake-up
Shutdown Control. Active Low.
Receiver Enable. Active Low
Negative Terminal of Voltage- Charge Pump Capacitor
25
26
GND
VCC
Ground
Supply Voltage
27
28
V+
C1 +
5.5V Generated by the Charge Pump
Positive Terminal of Voltage- Charge Pump Capacitor
ST3241E
PIN CONFIGURATION
SHUTDOWN AND ENABLE CONTROL TRUTH TABLE
SHDN
EN
TOUT
ROUT
ROUTB
0
0
1
1
0
1
0
1
HIGH Z
HIGH Z
ACTIVE
ACTIVE
ACTIVE
HIGH Z
ACTIVE
HIGH Z
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
VCC
Supply Voltage
V+
VV+ +|V-|
SHDN, EN,
TIN
RIN
TOUT
Unit
V
Extra Positive Voltage (Note 1)
(VCC -0.3) to 7
V
Extra negative Voltage (Note 1)
(Note 1)
Input Voltage
0.3 to -7
13
-0.3 to 6
V
V
Receiver Input Voltage Range
Transmitter Output Voltage Range
ROUT ROUTB Receiver Output Voltage Range
INVALID
Short Circuit Duration on TOUT (one at a time)
tSHORT
Tstg
Value
-0.3 to 6
Storage Temperature Range
V
± 25
V
± 13.2
V
-0.3 to (VCC + 0.3)
V
Continuous
-65 to 150
°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
Note 1: V+ and V- can have magnitude of 7V, but their absolute difference cannot exceed 13V
3/10
ST3241E
ESD PERFORMANCE: TRANSMITTER OUTPUTS, RECEIVER INPUTS
Symbol
ESD
ESD
Parameter
ESD Protection Voltage
ESD Protection Voltage
Test Conditions
Human Body Model
IEC 1000-4-2 (Contact Discharge)
Min.
Typ.
Max.
± 15
±8
Unit
KV
KV
ELECTRICAL CHARACTERISTICS
(C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA = 25°C)
Symbol
Parameter
ISUPPLY Supply Current
ISHDN
Shutdown Supply Current
Test Conditions
Min.
Typ.
No load VCC = 3.3V or 5V, TA = 25°C
SHDN = GND, TA = 25°C
Max.
Unit
0.3
1
mA
1
10
µA
Typ.
Max.
Unit
LOGIC INPUT AND RECEIVER OUTPUT ELECTRICAL CHARACTERISTICS
(C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA = 25°C)
Symbol
Parameter
Test Conditions
VTIL
Input Logic Threshold Low
TIN, EN, SHDN
VTIH
Input Logic Threshold High
VCC = 3.3V
VCC = 5V
Input Leakage Current
TIN, EN, SHDN
IIL
Min.
0.8
2
2.4
V
V
V
± 0.01
± 1.0
µA
Typ.
Max.
Unit
± 0.05
± 10
µA
0.4
V
RECEIVER OUTPUT ELECTRICAL CHARACTERISTICS
(C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA = 25°C)
Symbol
Parameter
Test Conditions
IOL
Output Leakage Current
ROUT, EN, Receiver Disabled
VOL
Output Voltage Low
IOUT = 1.6mA
VOH
Output Voltage High
IOUT = -1mA
Min.
VCC-0.6 VCC-0.1
V
TRANSMITTER ELECTRICAL CHARACTERISTICS
(C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA = 25°C)
Symbol
Parameter
VTOUT
Output Voltage Swing
ROUT
Output Resistance
ISC
IL
VTO
Test Conditions
All Transmitter outputs are loaded with
3KΩ to GND
VCC = V+ = V- = 0V
VOUT = ± 2V
Typ.
±5
± 5.4
300
10M
± 35
Output Short Circuit Current VCC = 3.3V
Output Leackage Current
Transmitter Output Voltage
VCC = 0 to 5.5V, trasmitter output = ± 12V,
trasmitter disabled
T1IN = T2IN = GND,
T3IN = VCC
T3OUT loaded with 3KΩ to GND
T1OUT and T2OUT loaded with 2.5mA
each
4/10
Min.
±5
Max.
Unit
V
Ω
± 60
mA
± 25
mA
V
ST3241E
RECEIVER ELECTRICAL CHARACTERISTICS
(C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA = 25°C)
Symbol
VRIN
VRIL
VRIH
Parameter
Test Conditions
Receiver Input Voltage
Operating Range
RS-232 Input Threshold
Low
TA = 25°C
TA = 25°C
VCC = 3.3V
VCC = 5.0V
RS-232 Input Threshold
High
TA = 25°C
TA = 25°C
VCC = 3.3V
VCC = 5.0V
Min.
-25
0.6
0.8
Input Resistance
Max.
Unit
25
V
1.2
1.5
1.5
1.8
VRIHYS Input Hysteresis
RRIN
Typ.
V
2.4
2.4
0.3
TA = 25°C
3
V
V
5
7
Typ.
Max.
KΩ
TIMING CHARACTERISTICS
(C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA = 25°C)
Symbol
DR
tPHL
tPLH
Parameter
Test Conditions
Maximum Data Rate
RL = 3KΩ
CL= 1000pF
one trasmitter switching
Receiver Propagation Delay RIN to ROUT
CL = 150pF
Min.
250
Unit
Kbps
µs
0.15
tT_SKEW Transmitter Skew
100
ns
tR_SKEW Receiver Skew
300
ns
SRT
Transition Slew Rate
TA = 25°C RL = 3K to 7KΩ
VCC = 3.3V
measured from +3V to -3V or -3V to +3V
CL = 150pF to 1000pF
CL = 150pF to 2500pF
6
4
30
30
V/µs
V/µs
5/10
ST3241E
APPLICATION CIRCUITS
Figure 1 : REQUIRED MINIMUM CAPACITANCE VALUE (µF)
6/10
VCC (V)
C1
C2, C3, C4,
CBYPASS
3 to 3.6
4.5 to 5.5
3 to 5.5
0.1
0.047
0.1
0.1
0.33
0.47
0.1
0.1
0.1
ST3241E
SO-28 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
A
MAX.
MIN.
TYP.
2.65
MAX.
0.104
a1
0.1
0.3
0.004
0.012
b
0.35
0.49
0.014
0.019
b1
0.23
0.32
0.009
0.012
C
0.5
0.020
c1
45˚ (typ.)
D
17.70
18.10
0.697
0.713
E
10.00
10.65
0.393
0.419
e
1.27
0.050
e3
16.51
0.650
F
7.40
7.60
0.291
0.300
L
0.50
1.27
0.020
0.050
S
8 ˚ (max.)
0016023
7/10
ST3241E
SSOP28 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
A
MIN.
TYP.
2
A1
0.050
A2
1.65
b
MAX.
0.079
0.002
1.85
0.065
0.22
0.38
0.009
0.015
c
0.09
0.25
0.004
0.010
D
9.9
10.2
10.5
0.390
0.402
0.413
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
8/10
MAX.
1.75
0.65 BSC
K
0˚
L
0.55
0.75
0.069
0.073
0.0256 BSC
10˚
0˚
0.95
0.022
10˚
0.030
0.037
ST3241E
TSSOP28 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
A
MAX.
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
0.0089
D
9.6
9.7
9.8
0.378
0.382
0.386
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
e
1
0.65 BSC
K
0˚
L
0.45
0.60
0.0256 BSC
8˚
0˚
0.75
0.018
8˚
0.024
0.030
0128292B
9/10
ST3241E
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. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
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