STMICROELECTRONICS ST3243ECPR

ST3243E
±15KV ESD PROTECTED 3 TO 5.5V, 400KBPS,
RS-232 TRANSCEIVER WITH AUTO-POWERDOWN
■
■
■
■
■
■
■
■
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, SSOP-28, TSSOP28
AND FLIP-CHIP28 PACKAGES
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 ±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 ST3243E 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
March 2004
SOP
Flip-Chip28
SSOP
TSSOP
disabled. If FORCEOFF is set low, both drivers
and receivers (expert R2B) are shut off, and
supply current is reduced to 1µA. 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.
1/18
ST3243E
ORDERING CODES
Type
Temperature
Range
Package
Comments
ST3243ECD
ST3243EBD
ST3243ECDR
ST3243EBDR
ST3243ECPR
ST3243EBPR
ST3243ECTR
ST3243EBTR
ST3243ECJ
ST3243EBJ
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
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)
FLIP-CHIP28
FLIP-CHIP28
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
coming soon
coming soon
PIN DESCRIPTION
2/18
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
11
T3OUT
Third Transmitter Output Voltage
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
INVALID
22
FORCEOFF
23
FORCEON
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 over-rides 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
24
C1-
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
ST3243E
PIN DESCRIPTION
PlN N°
SYMBOL
NAME AND FUNCTION
A1
R2IN
Second Receiver Input Voltage
A2
R3IN
Third Receiver Input Voltage
A3
R4IN
Fourth Receiver Input Voltage
A4
R5IN
Fifth Receiver Input Voltage
A5
T1OUT
First Transmitter Output Voltage
A6
T2OUT
Second Transmitter Output Voltage
B1
B2
VR1IN
B3
T3OUT
B4
T3IN
Third Transmitter Input Voltage
B5
T1IN
First Transmitter Input Voltage
B6
T2IN
Second Transmitter Input Voltage
-5.5V Generated by the Charge Pump
First Receiver Input Voltage
Third Transmitter Output Voltage
C1
C2 +
Positive Terminal of Inverting Charge Pump Capacitor
C2
C2-
Negative Terminal of Inverting Charge Pump Capacitor
C5
R4OUT
Fourth Receiver Output Voltage
C6
R5OUT
Fifth Receiver Output Voltage
D1
C1 +
Positive Terminal of Voltage- Charge Pump Capacitor
D2
D3
V+
VCC
5.5V Generated by the Charge Pump
Supply Voltage
D4
FORCEON
D5
R1OUT
Drive high to override automatic circuitry keeping transmitters
on (FORCEOFF must be high)
First Receiver Output Voltage
D6
R3OUT
Third Receiver Output Voltage
E1
E2
GND
C1-
E3
FORCEOFF
E4
INVALID
E5
R2OUTB
E6
R2OUT
Ground
Negative Terminal of Voltage- Charge Pump Capacitor
Drive low to shut down transmitters and on-board power
supply. This over-rides all automatic circuitry and FORCEON
Output of the valid signal detector. Indicates if a valid RS-232
level is present on receiver inputs logic "1"
Non-inverting Complementary Receiver Output, always active
for wake-up
Second Receiver Output Voltage
3/18
ST3243E
PIN CONFIGURATION
FLIP-CHIP 6x5
(bottom view, bumps side)
SOP, SSOP, TSSOP
(top view)
INVALID TRUTH TABLE
RS-232 SIGNAL PRESENT AT ANY RECEIVER INPUT
INVALID OUTPUT
YES
NO
H
L
OUTPUT CONTROL TRUTH TABLE
FORCE
ON
FORCE
OFF
VALID RECEIVER
LEVEL
X
0
X
1
1
X
0
1
YES
0
1
NO
4/18
OPERATION STATUS
TOUT
ROUT
R2OUTB
Shutdown (Force OFF)
Normal Operating (Force
ON)
Normal Operating
(Auto-powerdown)
Shutdown
(Auto-powerdown)
HIGH Z
HIGH Z
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
HIGH Z
ACTIVE
ACTIVE
ST3243E
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
VCC
Supply Voltage
V+
Doubled Voltage Terminal
RIN
-0.3 to 6
V
V
0.3 to -7
13
-0.3 to 6
V
V
V
± 25
V
± 13.2
V
-0.3 to (VCC + 0.3)
V
Receiver Input Voltage Range
Transmitter Output Voltage Range
ROUT ROUTB Receiver Output Voltage Range
INVALID
tSHORT
Short Circuit Duration on TOUT (one at a time)
Tstg
Unit
(VCC -0.3) to 7
VInverted Voltage Terminal
V+ +|V-|
FORCEON, Input Voltage
FORCEOFF,
TIN
TOUT
Value
Continuous
Storage Temperature Range
-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.
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
IASHDN
Parameter
Supply Current
Auto-powerdown
ISUPPLY Supply Current
ISHDN
Shutdown Supply Current
Test Conditions
Min.
FORCEOFF = GNDFORCEON = VCC
All R_IN open or grounded
FORCEON = FORCEOFF = VCC
FORCEOFF = GND
Typ.
Max.
Unit
1
10
µA
0.3
1
mA
1
10
µA
Typ.
Max.
Unit
0.8
V
LOGIC INPUT 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
T-IN, FORCEON, FORCEOFF
VTIH
Input Logic Threshold High
T-IN, FORCEON, FORCEOFF
VCC = 3.3V
VCC = 5V
IIL
Transmitter Input
Hysteresis
Input Leakage Current
VTHYS
Min.
2
2.4
V
V
0.5
V
T-IN, FORCEON, FORCEOFF
± 0.01
± 1.0
µA
± 0.05
± 10
µA
0.4
V
IOL
Output Leakage Current
Receiver Disabled
VOL
Output Voltage Low
IOUT = 1.6mA
VOH
Output Voltage High
IOUT = -1mA
VCC-0.6 VCC-0.1
V
5/18
ST3243E
AUTO-POWERDOWN ELECTRICAL CHARACTERISTICS
(C 1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA = 25°C, FORCEON = GND, FORCEOFF = VCC)
Symbol
Parameter
VRITE
Receiver Input Threshold to
INVALID Output Voltage
HIGH (Fig. 1)
Receiver Input Threshold to
INVALID Output Voltage
LOW (Fig. 1)
INVALID Output Voltage
LOW
INVALID Output Voltage
HIGH
Receiver or Transmitter
Edge Transmitter Enabled
(Fig. 1)
Receiver Positive or
Negative Threshold to
INVALID HIGH (Fig. 1)
Receiver Positive or
Negative Threshold to
INVALID LOW (Fig. 1)
VRITD
VIOL
VIOH
tWU
tINVH
tINVL
Test Conditions
Positive Threshold
Negative Threshold
Min.
Typ.
Unit
2.7
V
V
0.3
V
0.4
V
2.7
-0.3
IOUT = 1.6mA
IOUT = -1mA
Max.
VCC-0.6
V
100
µs
0.2
µs
30
µs
TRANSMITTER ELECTRICAL CHARACTERISTICS
(C 1 - 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
VOT
Test Conditions
All Transmitter outputs are loaded with
3KΩ to GND
VCC = V+ = V- = 0V
VOUT = ± 2V
Min.
Typ.
±5
± 5.4
V
300
10M
Ω
± 40
Output Short Circuit Current VCC = 3.3V
Output Leakage Current
Transmitter Output Voltage
VCC = 0 to 5.5V, transmitter output=± 12V,
transmitter disabled
T1IN = T2IN = GND,
T3IN = VCC
T3OUT loaded with 3KΩ to GND
Max.
Unit
± 60
mA
± 25
µA
±5
V
T1OUT and T2OUT loaded with 2.5mA
each
RECEIVER ELECTRICAL CHARACTERISTICS
(C 1 - 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.
0.6
0.8
6/18
Input Resistance
Max.
Unit
25
V
1.1
1.4
1.6
1.9
VRIHYS Input Hysteresis
RRIN
Typ.
-25
V
2.4
2.4
V
7
KΩ
0.5
TA = 25°C
3
5
V
ST3243E
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
Min.
Typ.
250
400
Kbps
0.15
µs
tT_SKEW Transmitter Skew
150
ns
tR_SKEW Receiver Skew
70
ns
DR
tPHL
tPLH
SRT
Parameter
Test Conditions
Maximum Data Rate
RL = 3KΩ
CL= 1000pF
one transmitter switching
Receiver Propagation Delay RIN to ROUT
CL = 150pF
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
Max.
30
30
Unit
V/µs
V/µs
7/18
ST3243E
APPLICATION CIRCUITS
REQUIRED MINIMUM CAPACITANCE VALUE (µF)
8/18
VCC (V)
C1
C2, C3, C4, CBYPASS
3 to 3.6
4.5 to 5.5
0.1
0.047
0.1
0.33
ST3243E
AUTOPOWERDOWN INPUT LEVELS
AUTOPOWERDOWN INPUT TIMING
9/18
ST3243E
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
10/18
ST3243E
SSOP28 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
A
MAX.
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
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
11/18
ST3243E
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
0.0079
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
12/18
ST3243E
Flip-Chip28 MECHANICAL DATA
mm.
mils
DIM.
MIN.
A
TYP
0.58
MAX.
MIN.
0.95
22.8
TYP.
37.4
A1
0.24
9.4
A2
0.65
25.6
b
0.25
D
3.97
D1
E
0.30
0.35
9.8
4.17
156.3
2.5
2.47
E1
MAX.
11.8
13.8
164.2
98.4
2.67
97.2
2
105.1
78.7
e
0.45
0.55
17.7
21.7
f
0.23
0.34
9.1
13.4
f1
0.80
0.91
31.5
31.8
7385199/A
13/18
ST3243E
Tape & Reel SO-28 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
14/18
TYP
0.504
30.4
0.519
1.197
Ao
10.8
11.0
0.425
0.433
Bo
18.2
18.4
0.716
0.724
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
ST3243E
Tape & Reel SSOP28 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
8.4
8.6
0.331
0.339
Bo
10.7
10.9
0.421
0.429
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
15/18
ST3243E
Tape & Reel TSSOP28 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
16/18
TYP
0.504
22.4
0.519
0.882
Ao
6.8
7
0.268
0.276
Bo
10.1
10.3
0.398
0.406
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
ST3243E
Tape & Reel Flip-Chip28 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
18.4
0.519
0.882
Ao
2.6
2.8
0.102
0.110
Bo
4.1
4.3
0.161
0.169
Ko
1.1
1.3
0.043
0.051
Po
3.9
4.1
0.153
0.161
P
3.9
4.1
0.153
0.161
17/18
ST3243E
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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18/18