ST ST3243E User Manual

查询ST3243E供应商
±15KV ESD PROTECTED 3 TO 5.5V, 400KBPS,
RS-232 TRANSCEIVER WITH AUTO-POWERDOWN
ESD PROTECTIONFOR 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 MOUSE DRIVEABILITY
0.1µF EXTERNAL CAPACITORS
MEET EIA/TIA-232 SPECIFICATIONSDOWN
TO 3V
AVAILABLE IN SO-28,SSOP-28, TSSOP28
AND FLIP-CHIP28 PACKAGES
SOP
ST3243E
Flip-Chip28
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 ST3243 E 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 p ump. The device is guaranteed to run at data rates of 250kbps while m aint aini ng RS-232 output levels. The Auto-powerdown f eat ure functions when FORCEON is low and FORCEO FF
is high. During this mode of operation, if the device do es not sense a valid RS-232 signal, the driver outputs are
SSOP
disabled. If FORCEOFF
TSSOP
is set low, both drivers and receivers (expert R2B) are shut off, and supply current is reduc ed to 1µA. Disconnecting the serial port or turning of f the peripheral drives causes the auto-powerdown condition to occur. Auto-powerdown can be disabled when FORCEON and FORCEOF F
are high, and shoul d be done when driving a serial mouse. With Auto-powerdown enabled, the device is activated automatically when a valid signal is applie d to any receiver input. Typical application are in notebook, subnotebook , palmtop computers, battery-powered equipment, hand-held equipment, peripherals and printers.
1/18March 2004
ST3243E
ORDERING CODES
Type
Temperature
Range
Package Comments
ST3243ECD 0 to 70°C SO-28 (Tube) 27parts per tube / 12tube per box
ST3243EBD -40 to 85°C SO-28 (Tube) 27parts per tube / 12tube per box ST3243ECDR 0 to 70°C SO-28 (Tape & Reel) 1000 parts per reel ST3243EBDR -40 to 85°C SO-28 (Tape & Reel) 1000 parts per reel ST3243ECPR 0 to 70°C SSOP-28 (Tape & Reel) 1350 parts per reel ST3243EBPR -40 to 85°C SSOP-28 (Tape & Reel) 1350 parts per reel ST3243ECTR 0 to 70°C TSSOP28 (Tape & Reel) 2500 parts per reel
ST3243EBTR -40 to 85°C TSSOP28 (Tape & Reel) 2500 parts per reel
ST3243ECJ 0 to 70°C FLIP-CHIP28 coming soon ST3243EBJ -40 to 85°C FLIP-CHIP28 coming soon
PIN DESCRIPTION
PlN N° SYMBOL NAME AND FUNCTION
1C 2C 3 V- -5.5V Generated by the Charge Pump
4R1 5R2 6R3 7R4 8R5
9T1 10 T2 11 T3 12 T3 13 T2 14 T1 15 R5 16 R4 17 R3 18 R2 19 R1 20
21 INVALID
22 FORCEOFF
23 FORCEON Drive high to override automatic circuitry keeping transmitters
24 C 25 GND Ground
26 V 27 V+ 5.5V Generated by the Charge Pump
28 C
2/18
+ Positive Terminal of Inverting Charge Pump Capacitor
2
- Negative Terminal of Inverting Charge Pump Capacitor
2
First Receiver Input Voltage Second Receiver Input Voltage Third Receiver Input Voltage Fourth Receiver Input Voltage Fifth Receiver Input Voltage First Transmitter Output Voltage Second Transmitter Output Voltage Third Transmitter Output Voltage Third Transmitter Input Voltage Second Transmitter Input Voltage First Transmitter Input Voltage Fifth Receiver Output Voltage Fourth Receiver Output Voltage Third Receiver Output Voltage Second Receiver Output Voltage First Receiver Output Voltage Non-inverting Complementary Receiver Output, always active
for wake-up
R2
IN IN IN IN
IN OUT OUT OUT
IN IN
IN OUT OUT OUT OUT OUT
OUTB
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
on (FORCEOFF
- Negative Terminal of Voltage- Charge Pump Capacitor
1
CC
+ Positive Terminal of Voltage- Charge Pump Capacitor
1
Supply Voltage
must be high)
PIN DESCRIPTION
PlN N° SYMBOL NAME AND FUNCTION
A1 R2 A2 R3 A3 R4 A4 R5 A5 T1 A6 T2 B1 V- -5.5V Generated by the Charge Pump
B2 R1 B3 T3 B4 T3 B5 T1
B6 T2 C1 C C2 C C5 R4 C6 R5 D1 C D2 V+ 5.5V Generated by the Charge Pump
D3 V D4 FORCEON Drive high to override automatic circuitry keeping transmitters
D5 R1 D6 R3 E1 GND Ground
E2 C E3 FORCEOFF
E4 INVALID
E5
E6 R2
IN IN IN
IN OUT OUT
IN OUT
IN
IN
IN
+ Positive Terminal of Inverting Charge Pump Capacitor
2
- Negative Terminal of Inverting Charge Pump Capacitor
2 OUT OUT
+ Positive Terminal of Voltage- Charge Pump Capacitor
1
CC
OUT OUT
- Negative Terminal of Voltage- Charge Pump Capacitor
1
Second Receiver Input Voltage Third Receiver Input Voltage Fourth Receiver Input Voltage Fifth Receiver Input Voltage First Transmitter Output Voltage Second Transmitter Output Voltage
First Receiver Input Voltage Third Transmitter Output Voltage Third Transmitter Input Voltage First Transmitter Input Voltage Second Transmitter Input Voltage
Fourth Receiver Output Voltage Fifth Receiver Output Voltage
Supply Voltage
on (FORCEOFF
must be high)
First Receiver Output Voltage Third Receiver Output Voltage
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"
R2
OUTB
OUT
Non-inverting Complementary Receiver Output, always active for wake-up
Second Receiver Output Voltage
ST3243E
3/18
ST3243E
PIN CONFIGURATION
SOP, SSOP, TSSOP
(top view)
FLIP-CHIP 6x5
(bottom view, bumps side)
INVALID TRUTH TABLE
RS-232 SIGNAL PRESENT AT ANY RECEIVER INPUT INVALID OUTPUT
YES H
NO L
OUTPUT CONTROL TRUTH TABLE
FORCEONFORCE
OFF
X 0 X Shutdown (Force OFF) HIGH Z HIGH Z ACTIVE 11 X
01 YES
01 NO
VALID RECEIVER
LEVEL
OPERATION STATUS
Normal Operating (Force
ON)
Normal Operating
(Auto-powerdown)
Shutdown
(Auto-powerdown)
T
OUT
ACTIVE ACTIVE ACTIVE
ACTIVE ACTIVE ACTIVE
HIGH Z ACTIVE ACTIVE
R
OUT
R
2OUTB
4/18
ST3243E
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
CC
V+
V- Inverted Voltage Terminal 0.3 to -7 V
V+ +|V-| 13 V
FORCEON,
FORCEOFF,
T
IN
R
IN
T
OUT
R
OUTROUTB
INVALID
t
SHORT
T
stg
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, RECE IVER INPUTS
Symbol Parameter Test Conditions Min. Typ. Max. Unit
ESD ESD Protection Voltage Human Body Model ± 15 KV ESD ESD Protection Voltage IEC 1000-4-2 (Contact Discharge) ± 8KV
Supply Voltage -0.3 to 6 Doubled Voltage Terminal (V
-0.3) to 7
CC
Input Voltage -0.3 to 6
Receiver Input Voltage Range ± 25 Transmitter Output Voltage Range ± 13.2 Receiver Output Voltage Range -0.3 to (VCC+0.3)
Short Circuit Duration on T
(one at a time) Continuous
OUT
Storage Temperature Range -65 to 150
V V
V
V V
V
°C
ELECTRICAL CHARACTERISTICS
(C Typical values are referred to T
Symbol Parameter Test Conditions Min. Typ. Max. Unit
I
I
SUPPLY
=0.1µF, VCC=3Vto5.5V,TA= -40 to 85° C, unles s otherwise specified.
1-C4
=25°C)
A
ASHDN
I
SHDN
Supply Current Auto-powerdown
Supply Current FORCEON = FORCEOFF =V Shutdown Supply Current FORCEOFF =GND 1 10 µA
FORCEOFF = GNDFORCEON =V All R_IN open or grounded
CC
CC
110µA
0.3 1 mA
LOGIC INPUT EL ECTRICAL CHARACTERISTICS
(C Typical values are referred to T
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
=0.1µF, VCC=3Vto5.5V,TA= -40 to 85° C, unles s otherwise specified.
1-C4
V
TIL
V
TIH
THYS
I
IL
I
OL
V
OL
V
OH
Input Logic Threshold Low T-IN, FORCEON, FORCEOFF 0.8 V Input Logic Threshold High T-IN, FORCEON, FORCEOFF
Transmitter Input Hysteresis
Input Leakage Current T-IN, FORCEON, FORCEOFF ± 0.01 ± 1.0 µA Output Leakage Current Receiver Disabled ± 0.05 ± 10 µA Output Voltage Low I Output Voltage High I
=25°C)
A
VCC=3.3V V
OUT OUT
=5V
CC
=1.6mA 0.4 V =-1mA VCC-0.6 VCC-0.1 V
2
2.4
0.5 V
V V
5/18
ST3243E
AUTO-POWERDOWN ELECTRICAL CHARACTERISTICS
(C Typical values are referred t o T
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
=0.1µF, VCC=3Vto5.5V,TA= -40 to 85° C, unless ot herwise s pec ified.
1-C4
= 25°C, FORCE ON = GND, FORCEOFF =VCC)
A
V
Receiver Input Threshold to
RITE
INVALID
Output Voltage
HIGH (Fig. 1) Receiver Input Threshold to
RITD
INVALID
Output Voltage
PositiveThreshold 2.7 V Negative Threshold 2.7 V
LOW (Fig. 1)
V
V
INVALIDOutput Voltage
IOL
LOW INVALIDOutput Voltage
IOH
HIGH
t
Receiver or Transmitter
WU
Edge Transmitter Enabled
I
=1.6mA 0.4 V
OUT
I
=-1mA VCC-0.6 V
OUT
(Fig. 1)
t
t
Receiver Positive or
INVH
Negative Threshold to INVALID
Receiver Positive or
INVL
Negative Threshold to INVALID
HIGH (Fig. 1)
LOW (Fig. 1)
-0.3 0.3 V
100 µs
0.2 µs
30 µs
TRANSMITTER ELECTRICAL CHARACT ERISTICS
(C Typical values are referred t o T
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
=0.1µF, VCC=3Vto5.5V,TA= -40 to 85° C, unless ot herwise s pec ified.
1-C4
TOUT
R
OUT
I
SC
I
L
Output Voltage Swing All Transmitter outputs are loaded with
Output Resistance VCC=V+=V-=0V V Output Short Circuit Current VCC=3.3V ± 40 ± 60 mA Output Leakage Current VCC= 0 to 5.5V, transmitter output=± 12V,
= 25°C)
A
3Kto GND
= ± 2V 300 10M
OUT
transmitter disabled
V
Transmitter Output Voltage T1IN = T2IN = GND, T3IN = V
OT
CC
T3OUT loaded with 3Kto GND T1OUT and T2OUT loaded with 2.5mA
each
± 5 ± 5.4 V
± 25 µA
± 5V
RECEIVER ELECTRICAL CHARACTERISTICS
(C Typical values are referred t o T
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
=0.1µF, VCC=3Vto5.5V,TA= -40 to 85° C, unless ot herwise s pec ified.
1-C4
V
RIN
V
RIL
V
RIH
RIHYS
R
RIN
Receiver Input Voltage Operating Range
RS-232 Input Threshold Low
RS-232 Input Threshold High
Input Hysteresis 0.5 V Input Resistance TA= 25°C 3 5 7 K
= 25°C)
A
TA= 25°C VCC=3.3V T
= 25°C VCC=5.0V
A
TA= 25°C VCC=3.3V T
= 25°C VCC=5.0V
A
-25 25 V
0.6
0.8
1.1
1.4
1.6
1.9
2.4
2.4
V
V
6/18
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