TI SN75C3238EDWR

SLLS726 – MAY 2006
FEATURES
•
•
•
•
•
•
•
•
•
•
RS-232 Bus-Pin ESD Protection Exceeds
±15 kV Using Human-Body Model (HBM)
Meet or Exceed the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
Operate With 3-V to 5.5-V VCC Supply
Operate up to 1000 kbit/s
Five Drivers and Three Receivers
Auto-Powerdown Plus Feature Enables
Flexible Power-Down Mode
Low Standby Current . . . 1 µA Typical
External Capacitors . . . 4 × 0.1 µF
Accept 5-V Logic Input With 3.3-V Supply
Always-Active Noninverting Receiver Output
(ROUT1B)
ESD Protection for RS-232 Interface Pins
– ±15 kV – Human-Body Model (HBM)
– ±8 kV – IEC61000-4-2, Contact Discharge
– ±15 kV – IEC61000-4-2, Air-Gap Discharge
DB, DW, OR PW PACKAGE
(TOP VIEW)
C2 +
GND
C2−
V−
DOUT1
DOUT2
DOUT3
RIN1
RIN2
DOUT4
RIN3
DOUT5
FORCEON
FORCEOFF
Battery-Powered Systems
PDAs
Notebooks
Subnotebooks
Laptops
Palmtop PCs
Hand-Held Equipment
Modems
Printers
28
2
27
3
26
4
25
5
24
6
23
7
22
8
21
9
20
10
19
11
18
12
17
13
16
14
15
C1+
V+
VCC
C1−
DIN1
DIN2
DIN3
ROUT1
ROUT2
DIN4
ROUT3
DIN5
ROUT1B
INVALID
RHB PACKAGE
(TOP VIEW)
APPLICATIONS
•
•
•
•
•
•
•
•
•
1
V−
C2–
GND
C2+
C1+
V+
VCC
NC
•
32 31 30 29 28 27 26 25
DOUT1
DOUT2
DOUT3
RIN1
RIN2
DOUT4
RIN3
NC
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
C1–
DIN1
DIN2
DIN3
ROUT1
ROUT2
DIN4
ROUT3
DOUT5
FORCEON
FORCEOFF
INVALID
NC
ROUT1B
DIN5
NC
9 10 11 12 13 14 15 16
DESCRIPTION/ORDERING INFORMATION
The SN65C3238E and SN75C3238E consist of five line drivers, three line receivers, and a dual charge-pump
circuit with ±15-kV ESD (HBM) protection on the driver output (DOUT) and receiver input (RIN) terminals. The
devices meet the requirements of TIA/EIA-232-F and provide the electrical interface between notebook and
subnotebook computer applications. The charge pump and four small external capacitors allow operation from a
single 3-V to 5.5-V supply. In addition, the devices include an always-active noninverting output (ROUT1B),
which allows applications using the ring indicator to transmit data while the device is powered down. These
devices operate at data signaling rates up to 1000 kbit/s.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data and
other specifications are design goals. Texas Instruments reserves
the right to change or discontinue these products without notice.
Copyright © 2006, Texas Instruments Incorporated
PRODUCT PREVIEW
www.ti.com
SN65C3238E,, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
SN65C3238E,, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726 – MAY 2006
DESCRIPTION/ORDERING INFORMATION (CONTINUED)
Flexible control options for power management are featured when the serial port and driver inputs are inactive.
The auto-powerdown plus feature functions when FORCEON is low and FORCEOFF is high. During this mode
of operation, if the devices do not sense valid signal transitions on all receiver and driver inputs for
approximately 30 s, the built-in charge pump and drivers are powered down, reducing the supply current to
1 µA. By disconnecting the serial port or placing the peripheral drivers off, auto-powerdown plus occurs if there
is no activity in the logic levels for the driver inputs. Auto-powerdown plus can be disabled when FORCEON and
FORCEOFF are high. With auto-powerdown plus enabled, the devices activate automatically when a valid signal
is applied to any receiver or driver input. INVALID is high (valid data) if any receiver input voltage is greater than
2.7 V or less than –2.7 V, or has been between –0.3 V and 0.3 V for less than 30 µs. INVALID is low (invalid
data) if all receiver input voltages are between –0.3 V and 0.3 V for more than 30 µs. Refer to Figure 5 for
receiver input levels.
ORDERING INFORMATION
PACKAGE (1)
TA
SSOP – DB
0°C to 70°C
TSSOP – PW
PRODUCT PREVIEW
SOIC – DW
QFN – RHB
SSOP – DB
–40°C to 85°C
TSSOP – PW
SOIC – DW
QFN – RHB
(1)
2
ORDERABLE PART NUMBER
Tube of 50
SN75C3238EDB
Reel of 2000
SN75C3238EDBR
Tube of 50
SN75C3238EPW
Reel of 2000
SN75C3238EPWR
Tube of 50
SN75C3238EDW
Reel of 2000
SN75C3238EDWR
Reel of 2000
SN75C3238ECRHBR
Tube of 50
SN65C3238EDB
Reel of 2000
SN65C3238EDBR
Tube of 50
SN65C3238EPW
Reel of 2000
SN65C3238EPWR
Tube of 50
SN65C3238EDW
Reel of 2000
SN65C3238EDWR
Reel of 2000
SN65C3238EIRHBR
TOP-SIDE MARKING
75C3238E
Preview
75C3238E
Preview
65C3238E
Preview
65C3238E
Preview
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
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SN65C3238E,, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726 – MAY 2006
FUNCTION TABLES
abc
Each Driver (1)
INPUTS
DIN
(1)
FORCEON
FORCEOFF
TIME ELAPSED SINCE LAST
RIN OR DIN TRANSITION
OUTPUT
DOUT
DRIVER STATUS
X
X
L
X
Z
Powered off
L
H
H
X
H
H
H
H
X
L
Normal operation with
auto-powerdown plus disabled
L
L
H
<30 s
H
H
L
H
<30 s
L
L
L
H
>30 s
Z
H
L
H
>30 s
Z
Normal operation with
auto-powerdown plus enabled
Powered off by
auto-powerdown plus feature
H = high level, L = low level, X = irrelevant, Z = high impedance
Each Receiver (1)
OUTPUTS
RIN1
RIN2–RIN3
FORCEOFF
TIME ELAPSED SINCE LAST
RIN OR DIN TRANSITION
ROUT1B
ROUT2 AND
ROUT3
RECEIVER STATUS
Powered off while
ROUT1B is active
L
X
L
X
L
Z
H
X
L
X
H
Z
L
L
H
<30 s
L
H
L
H
H
<30 s
L
L
H
L
H
<30 s
H
H
H
H
H
<30 s
H
L
Open
Open
H
<30 s
L
H
(1)
PRODUCT PREVIEW
INPUTS
Normal operation with
auto-powerdown plus
disabled/enabled
H = high level, L = low level, X = irrelevant, Z = high impedance (off), Open = input disconnected or connected driver off
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3
SN65C3238E,, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726 – MAY 2006
LOGIC DIAGRAM (POSITIVE LOGIC)
DIN1
DIN2
DIN3
DIN4
DIN5
FORCEOFF
PRODUCT PREVIEW
FORCEON
ROUT1B
ROUT1
ROUT2
ROUT3
4
24
5
23
6
22
7
19
10
17
12
DOUT1
DOUT2
DOUT3
DOUT4
DOUT5
14
13
Auto-powerdown Plus
15
INVALID
16
21
8
20
9
18
11
RIN1
RIN2
RIN3
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SN65C3238E,, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726 – MAY 2006
Absolute Maximum Ratings
(1)
over operating free-air temperature range (unless otherwise noted)
MIN
MAX
VCC
Supply voltage range (2)
–0.3
6
V
V+
Positive-output supply voltage range (2)
–0.3
7
V
0.3
–7
V
13
V
Negative-output supply voltage
V+ – V–
Supply voltage difference (2)
VI
Input voltage range
VO
Output voltage range
θJA
Driver (FORCEOFF, FORCEON)
–0.3
6
Receiver
–25
25
Driver
Receiver (INVALID)
Package thermal impedance (3) (4)
–13.2
13.2
–0.3
VCC + 0.3
DB package
62
DW package
46
PW package
62
RHB package
TJ
Operating virtual junction temperature
Tstg
Storage temperature range
(1)
(2)
(3)
(4)
V
V
°C/W
TBD
–65
150
°C
150
°C
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
All voltages are with respect to network GND.
Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient
temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
The package thermal impedance is calculated in accordance with JESD 51-7.
Recommended Operating Conditions (1)
See Figure 6
MIN NOM
VCC = 3.3 V
Supply voltage
VCC = 5 V
VIH
Driver and control high-level input voltage
DIN, FORCEOFF,
FORCEON
VIL
Driver and control low-level input voltage
DIN, FORCEOFF, FORCEON
VI
Receiver input voltage
TA
Operating free-air temperature
(1)
3.3
3.6
4.5
5
5.5
VCC = 3.3 V
VCC = 5 V
MAX
3
2
5.5
2.4
5.5
UNIT
V
V
0
0.8
V
–25
25
V
SN75C3238E
0
70
SN65C3238E
–40
85
°C
Testing supply conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at VCC = 3.3 V ± 0.3 V; and C1 = 0.047 µF
and C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.
Electrical Characteristics (1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6)
PARAMETER
II
ICC
(1)
(2)
Input leakage current
Supply current
(TA = 25°C)
TEST CONDITIONS
FORCEOFF, FORCEON
MIN
TYP (2)
MAX
±0.01
±1
µA
0.5
2
mA
Auto-powerdown plus
disabled
No load,
FORCEOFF and FORCEON at VCC
Powered off
No load, FORCEOFF at GND
1
10
Auto-powerdown plus
enabled
No load, FORCEOFF at VCC,
FORCEON at GND,
All RIN are open or grounded
1
10
UNIT
µA
Testing supply conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at VCC = 3.3 V ± 0.3 V; and C1 = 0.047 µF
and C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.
All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
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5
PRODUCT PREVIEW
V–
range (2)
UNIT
SN65C3238E,, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726 – MAY 2006
DRIVER SECTION
xxx
Electrical Characteristics (1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6)
PARAMETER
MIN TYP (2) MAX
TEST CONDITIONS
VOH
High-level output voltage
All DOUT at RL = 3 kΩ to GND
5
5.4
VOL
Low-level output voltage
All DOUT at RL = 3 kΩ to GND
–5
–5.4
IIH
High-level input current
VI = VCC
IIL
Low-level input current
VI at GND
µA
µA
±0.01
±1
VO = 0 V
±35
±60
VCC = 5.5 V,
VO = 0 V
±40 ±100
VO = ±2 V
ro
Output resistance
VCC, V+, and V– = 0 V,
IOZ
Output leakage current
FORCEOFF = GND
(2)
(3)
V
±1
VCC = 3.6 V,
Short-circuit output current (3)
(1)
V
±0.01
IOS
300
UNIT
mA
Ω
10M
VO = ±12 V,
VCC = 3 V to 3.6 V
±25
VO = ±10 V,
VCC = 4.5 V to 5.5 V
±25
µA
Testing supply conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at VCC = 3.3 V ± 0.3 V; and C1 = 0.047 µF
and C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.
All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
Short-circuit durations should be controlled to prevent exceeding the device absolute power dissipation ratings, and not more than one
output should be shorted at a time.
PRODUCT PREVIEW
Switching Characteristics (1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6)
PARAMETER
Maximum data rate
(see Figure 1)
MIN TYP (2) MAX
TEST CONDITIONS
RL = 3 kΩ,
One DOUT switching
CL = 1000 pF
CL = 250 pF,
VCC = 3 V to 4.5 V
1000
CL = 1000 pF,
VCC = 4.5 V to 5.5 V
1000
tsk(p)
Pulse skew (3)
CL = 150 pF to 2500 pF,
RL = 3 kΩ to 7 kΩ,
See Figure 2
SR(tr)
Slew rate,
transition region
(see Figure 1)
CL = 150 pF to 1000 pF,
RL = 3 kΩ to 7 kΩ,
VCC = 3.3 V
(1)
(2)
(3)
UNIT
250
kbit/s
25
18
ns
150
V/µs
Testing supply conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at VCC = 3.3 V ± 0.3 V; and C1 = 0.047 µF
and C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.
All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
Pulse skew is defined as |tPLH – tPHL| of each channel of the same device.
ESD Protection
PARAMETER
DOUT
6
TEST CONDITIONS
TYP
HBM
±15
IEC 61000-4-2, Air-Gap Discharge
±15
IEC 61000-4-2, Contact Discharge
±8
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UNIT
kV
SN65C3238E,, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726 – MAY 2006
RECEIVER SECTION
xxx
Electrical Characteristics (1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6)
PARAMETER
VOH
High-level output voltage
IOH = –1 mA
VOL
Low-level output voltage
IOL = 1.6 mA
VCC – 0.6
VCC – 0.1
MAX
1.5
2.4
VCC = 5 V
1.8
2.4
VIT–
Negative-going input threshold voltage
Vhys
Input hysteresis (VIT+ – VIT–)
IOZ
Output leakage current (except ROUT1B)
FORCEOFF = 0 V
ri
Input resistance
VI = ±3 V to ±25 V
VCC = 3.3 V
0.6
1.2
VCC = 5 V
0.8
1.5
UNIT
V
VCC = 3.3 V
Positive-going input threshold voltage
(2)
TYP (2)
0.4
VIT+
(1)
MIN
TEST CONDITIONS
V
V
V
0.3
V
±0.05
±10
µA
5
7
kΩ
3
Testing supply conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at VCC = 3.3 V ± 0.3 V; and C1 = 0.047 µF
and C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.
All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
PRODUCT PREVIEW
Switching Characteristics (1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TYP (2)
UNIT
tPLH
Propagation delay time, low- to high-level output
CL = 150 pF, See Figure 3
150
ns
tPHL
Propagation delay time, high- to low-level output
CL = 150 pF, See Figure 3
150
ns
ten
Output enable time
CL = 150 pF, RL = 3 kΩ, See Figure 4
200
ns
tdis
Output disable time
CL = 150 pF, RL = 3 kΩ, See Figure 4
200
ns
tsk(p)
Pulse skew (3)
See Figure 3
50
ns
(1)
(2)
(3)
Testing supply conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at VCC = 3.3 V ± 0.3 V; and C1 = 0.047 µF
and C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.
All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
Pulse skew is defined as |tPLH – tPHL| of each channel of the same device.
ESD Protection
PARAMETER
RIN
TEST CONDITIONS
TYP
HBM
±15
IEC 61000-4-2, Air-Gap Discharge
±15
IEC 61000-4-2, Contact Discharge
±8
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UNIT
kV
7
SN65C3238E,, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726 – MAY 2006
AUTO-POWERDOWN PLUS SECTION
xxx
Electrical Characteristics
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 5)
PARAMETER
TEST CONDITIONS
MIN
VT+(valid)
Receiver input threshold
for INVALID high-level output voltage
FORCEON = GND, FORCEOFF = VCC
VT–(valid)
Receiver input threshold
for INVALID high-level output voltage
FORCEON = GND, FORCEOFF = VCC
–2.7
VT(invalid)
Receiver input threshold
for INVALID low-level output voltage
FORCEON = GND, FORCEOFF = VCC
–0.3
VOH
INVALID high-level output voltage
IOH = –1 mA, FORCEON = GND,
FORCEOFF = VCC
VOL
INVALID low-level output voltage
IOL = 1.6 mA, FORCEON = GND,
FORCEOFF = VCC
MAX
2.7
UNIT
V
V
0.3
VCC – 0.6
V
V
0.4
V
Switching Characteristics
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 5)
PARAMETER
TYP (1)
MAX
UNIT
PRODUCT PREVIEW
tvalid
Propagation delay time, low- to high-level output
0.1
µs
tinvalid
Propagation delay time, high- to low-level output
50
µs
ten
Supply enable time
25
tdis
Receiver or driver edge to auto-powerdown plus
(1)
8
MIN
All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
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15
30
µs
60
s
SN65C3238E,, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726 – MAY 2006
PARAMETER MEASUREMENT INFORMATION
3V
Generator
(see Note B)
Input
RS-232
Output
50 Ω
RL
tTHL
CL
(see Note A)
3V
FORCEOFF
TEST CIRCUIT
0V
3V
3V
Output
SR(tr) +
tTLH
−3 V
−3 V
6V
t THL or tTLH
VOH
VOL
VOLTAGE WAVEFORMS
A.
CL includes probe and jig capacitance.
B.
The pulse generator has the following characteristics: PRR = 250 kbit/s, ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns,
tf ≤ 10 ns.
Figure 1. Driver Slew Rate
3V
50 Ω
RL
1.5 V
1.5 V
0V
CL
(see Note A)
tPHL
PRODUCT PREVIEW
Generator
(see Note B)
RS-232
Output
Input
tPLH
VOH
3V
FORCEOFF
50%
50%
Output
VOL
TEST CIRCUIT
VOLTAGE WAVEFORMS
A.
CL includes probe and jig capacitance.
B.
The pulse generator has the following characteristics: PRR = 250 kbit/s, ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns,
tf ≤ 10 ns.
Figure 2. Driver Pulse Skew
3 V or 0 V
FORCEON
3V
Input
1.5 V
1.5 V
−3 V
Output
Generator
(see Note B)
tPHL
50 Ω
3V
FORCEOFF
tPLH
CL
(see Note A)
VOH
50%
Output
50%
VOL
TEST CIRCUIT
VOLTAGE WAVEFORMS
A.
CL includes probe and jig capacitance.
B.
The pulse generator has the following characteristics: ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.
Figure 3. Receiver Propagation Delay Times
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SN65C3238E,, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726 – MAY 2006
PARAMETER MEASUREMENT INFORMATION (continued)
3V
Input
VCC
3 V or 0 V
FORCEON
1.5 V
0V
tPHZ
(S1 at GND)
RL
3 V or 0 V
1.5 V
GND
S1
VOH
Output
50%
Output
CL
(see Note A)
FORCEOFF
Generator
(see Note B)
0.3 V
tPLZ
(S1 at VCC)
50 Ω
tPZL
(S1 at VCC)
0.3 V
Output
50%
VOL
TEST CIRCUIT
VOLTAGE WAVEFORMS
PRODUCT PREVIEW
A.
CL includes probe and jig capacitance.
B.
The pulse generator has the following characteristics: ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.
C.
tPLZ and tPHZ are the same as tdis.
D.
tPZL and tPZH are the same as ten.
Figure 4. Receiver Enable and Disable Times
10
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SN65C3238E,, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726 – MAY 2006
PARAMETER MEASUREMENT INFORMATION (continued)
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
Valid RS-232 Level, INVALID High
ROUT
Generator
(see Note B)
2.7 V
50 Ω
Indeterminate
0.3 V
0V
−0.3 V
Indeterminate
Autopowerdown
Plus
INVALID
−2.7 V
CL = 30 pF
(see Note A)
Valid RS-232 Level, INVALID High
†
FORCEOFF
FORCEON
If Signal Remains Within This Region
For More Than 30 µs, INVALID Is Low†
DIN
DOUT
Auto-powerdown plus disables drivers and reduces
supply current to 1 µA.
NOTES: A. CL includes probe and jig capacitance.
B. The pulse generator has the following
characteristics: PRR = 5 kbit/s, ZO = 50 Ω, 50%
duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.
Receiver
Input
3V
2.7 V
0V
0V
−2.7 V
−3 V
tinvalid
tvalid
INVALID
Output
Driver
Input
50%
VCC
50%
0V
3 V to 5 V
50%
50%
0V
≈5.5 V
Driver
Output
≈ −5.5 V
tdis
ten
tdis
ten
V+
Supply
Voltages
V+
V+ −0.3 V
V− +0.3 V
V−
V−
Voltage Waveforms and Timing Diagrams
Figure 5. INVALID Propagation-Delay Times and Supply-Enabling Time
Submit Documentation Feedback
11
PRODUCT PREVIEW
TEST CIRCUIT
SN65C3238E,, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726 – MAY 2006
APPLICATION INFORMATION
CBYPASS = 0.1 µF
+
−
1
2
+
C2
27
+
GND
−
4
+
V+
28
−
3
−
C1+
C2+
C2−
VCC
V−
C1−
C4
DOUT1
DOUT2
DOUT3
PRODUCT PREVIEW
RIN1
C3†
+
−
26
C1
25
5
24
6
23
7
22
8
21
9
20
DIN1
DIN2
DIN3
ROUT1
RS-232 Port
RIN2
ROUT2
Logic I/Os
5 kΩ
DOUT4
RIN3
10
19
11
18
DIN4
ROUT3
5 kΩ
DOUT5
12
17
16
DIN5
ROUT1B
5 kΩ
FORCEON
FORCEOFF
13
14
Autopowerdown
Plus
15
INVALID
VCC vs CAPACITOR VALUES
VCC
†
C3 can be connected to VCC or GND.
NOTES: A. Resistor values shown are nominal.
B. Nonpolarized ceramic capacitors are acceptable. If polarized tantalum
or electrolytic capacitors are used, they should be connected as
shown.
3.3 V ± 0.15 V
3.3 V ± 0.3 V
5 V ± 0.5 V
3 V to 5.5 V
Figure 6. Typical Operating Circuit and Capacitor Values
12
Submit Documentation Feedback
C1
0.1 µF
0.22 µF
0.047 µF
0.22 µF
C2, C3, and C4
0.1 µF
0.22 µF
0.33 µF
1 µF
MECHANICAL DATA
MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001
DB (R-PDSO-G**)
PLASTIC SMALL-OUTLINE
28 PINS SHOWN
0,38
0,22
0,65
28
0,15 M
15
0,25
0,09
8,20
7,40
5,60
5,00
Gage Plane
1
14
0,25
A
0°–ā8°
0,95
0,55
Seating Plane
2,00 MAX
0,10
0,05 MIN
PINS **
14
16
20
24
28
30
38
A MAX
6,50
6,50
7,50
8,50
10,50
10,50
12,90
A MIN
5,90
5,90
6,90
7,90
9,90
9,90
12,30
DIM
4040065 /E 12/01
NOTES: A.
B.
C.
D.
All linear dimensions are in millimeters.
This drawing is subject to change without notice.
Body dimensions do not include mold flash or protrusion not to exceed 0,15.
Falls within JEDEC MO-150
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