TEXAS INSTRUMENTS MAX3238E Technical data
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DOUT1
DOUT2
DOUT3
RIN1
RIN2
DOUT4
RIN3
NC
C1–
DIN1
DIN2
DIN3
ROUT1
ROUT2
DIN4
ROUT3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
C2+
GND
C2−
V−
DOUT1
DOUT2
DOUT3
RIN1
RIN2
DOUT4
RIN3
DOUT5
FORCEON
FORCEOFF
C1+
V+
V
CC
C1−
DIN1
DIN2
DIN3
ROUT1
ROUT2
DIN4
ROUT3
DIN5
ROUT1B
INVALID
DB, DW, OR PW PACKAGE
(TOP VIEW)
RHB PACKAGE
(TOP VIEW)
V−
C2–
GND
C2+
C1+V+VCCNC
DOUT5
FORCEON
FORCEOFF
INVALID
NC
ROUT1B
DIN5
NC
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
3132 30 29 28 27 26 25
109 1112 13 14 15 16
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
FEATURES
• RS-232 Bus-Pin ESD Protection Exceeds
± 15 kV Using Human-Body Model (HBM)
• Meets or Exceeds the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
• Operates With 3-V to 5.5-V V
• Operates up to 400 kbit/s
• Five Drivers and Three Receivers
• Auto-Powerdown Plus Feature Enables
Flexible Power-Down Mode
• Low Standby Current . . . 1 µ A Typical
• External Capacitors . . . 4 × 0.1 µ F
• Accepts 5-V Logic Input With 3.3-V Supply
• Always-Active Noninverting Receiver Output
(ROUT1B)
• Alternative High-Speed Pin-Compatible
Device (1 Mbit/s) for SNx5C3238
• 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
APPLICATIONS
• Battery-Powered Systems
• PDAs
• Notebooks
• Subnotebooks
• Laptops
• Palmtop PCs
• Hand-Held Equipment
• Modems
• Printers
Supply
CC
MAX3238E
WITH ± 15-kV ESD (HBM) PROTECTION
SLLS710A – FEBRUARY 2006 – REVISED APRIL 2006
DESCRIPTION/ORDERING INFORMATION
The MAX3238E consists 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 device meets the
requirements of TIA/EIA-232-F and provides 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 device includes an always-active noninverting output (ROUT1B), which allows
applications using the ring indicator to transmit data while the device is powered down. This device operates at
data signaling rates up to 250 kbit/s and a maximum of 30-V/ µ s driver output slew rate.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006, Texas Instruments Incorporated
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.
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MAX3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ± 15-kV ESD (HBM) PROTECTION
SLLS710A – FEBRUARY 2006 – REVISED APRIL 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 device does 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 µ A. 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 device activates 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 µ s. INVALID is low (invalid
data) if all receiver input voltages are between –0.3 V and 0.3 V for more than 30 µ s. Refer to Figure 5 for
receiver input levels.
ORDERING INFORMATION
T
A
SSOP – DB MAX3238EC
0 ° C to 70 ° C TSSOP – PW MP238EC
SOIC – DW Reel of 2000 MAX3238ECDWR MAX3238EC
QFN – RHB Reel of 2000 MAX3238ECRHBR Preview
SSOP – DB MAX3238EI
–40 ° C to 85 ° C TSSOP – PW MP238EI
SOIC – DW Reel of 2000 MAX3238ICDWR MAX3238EI
QFN – RHB Reel of 2000 MAX3238EIRHBR Preview
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
PACKAGE
(1)
Tube of 50 MAX3238ECDB
Reel of 2000 MAX3238ECDBR
Tube of 50 MAX3238ECPW
Reel of 2000 MAX3238ECPWR
Tube of 50 MAX3238EIDB
Reel of 2000 MAX3238EIDBR
Tube of 50 MAX3238EIPW
Reel of 2000 MAX3238EIPWR
ORDERABLE PART NUMBER TOP-SIDE MARKING
2
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3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ± 15-kV ESD (HBM) PROTECTION
SLLS710A – FEBRUARY 2006 – REVISED APRIL 2006
FUNCTION TABLES
abc
Each Driver
INPUTS
DIN FORCEON FORCEOFF
X X L X Z Powered off
L H H X H
H H H X L
L L H <30 s H
H L H <30 s L
L L H >30 s Z
H L H >30 s Z
(1) H = high level, L = low level, X = irrelevant, Z = high impedance
TIME ELAPSED SINCE LAST
RIN OR DIN TRANSITION
Each Receiver
INPUTS OUTPUTS
RIN1 RIN2–RIN3 FORCEOFF ROUT1B
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 auto-powerdown plus
H H H <30 s H L
Open Open H <30 s L H
(1) H = high level, L = low level, X = irrelevant, Z = high impedance (off), Open = input disconnected or connected driver off
TIME ELAPSED SINCE LAST ROUT2 AND
RIN OR DIN TRANSITION ROUT3
(1)
OUTPUT
DOUT
(1)
DRIVER STATUS
Normal operation with
auto-powerdown plus disabled
Normal operation with
auto-powerdown plus enabled
Powered off by
auto-powerdown plus feature
RECEIVER STATUS
Powered off while
ROUT1B is active
Normal operation with
disabled/enabled
MAX3238E
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DIN3
DIN2
DIN1
DOUT3
DOUT2
DOUT1
Auto-powerdown Plus
INVALID
RIN1
RIN2
RIN3
FORCEOFF
FORCEON
ROUT1
ROUT1B
ROUT2
ROUT3
24
23
22
14
13
21
16
20
18
5
6
7
15
8
9
11
DIN4
DOUT4
19 10
DIN5
DOUT5
17 12
MAX3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ± 15-kV ESD (HBM) PROTECTION
SLLS710A – FEBRUARY 2006 – REVISED APRIL 2006
LOGIC DIAGRAM (POSITIVE LOGIC)
4
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3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ± 15-kV ESD (HBM) PROTECTION
SLLS710A – FEBRUARY 2006 – REVISED APRIL 2006
Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)
V
CC
V+ Positive-output supply voltage range
V– Negative-output supply voltage range
V+ – V– Supply voltage difference
V
I
V
O
θ
JA
T
J
T
stg
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
(2) All voltages are with respect to network GND.
(3) Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient
(4) The package thermal impedance is calculated in accordance with JESD 51-7.
Supply voltage range
Input voltage range V
Output voltage range V
Package thermal impedance
Operating virtual junction temperature 150 ° C
Storage temperature range –65 150 ° C
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.
temperature is PD= (TJ(max) – TA)/ θJA. Operating at the absolute maximum TJof 150 ° C can affect reliability.
(1)
MIN MAX UNIT
(2)
(2)
(2)
(2)
–0.3 6 V
–0.3 7 V
0.3 –7 V
Driver ( FORCEOFF, FORCEON) –0.3 6
Receiver –25 25
Driver –13.2 13.2
Receiver ( INVALID) –0.3 V
+ 0.3
CC
DB package 62
(3) (4)
DW package 46
PW package 62
RHB package TBD
MAX3238E
13 V
° C/W
Recommended Operating Conditions
(1)
See Figure 6
MIN NOM MAX UNIT
V
= 3.3 V 3 3.3 3.6
Supply voltage V
V
Driver and control high-level input voltage V
IH
V
Driver and control low-level input voltage DIN, FORCEOFF, FORCEON 0 0.8 V
IL
V
Receiver input voltage –25 25 V
I
T
Operating free-air temperature ° C
A
(1) Testing supply conditions are C1–C4 = 0.1 µ F at V
and C2–C4 = 0.33 µ F at V
Electrical Characteristics
= 5 V ± 0.5 V.
CC
(1)
DIN, FORCEOFF,
FORCEON
= 3.3 V ± 0.15 V; C1–C4 = 0.22 µ F at V
CC
CC
V
= 5 V 4.5 5 5.5
CC
V
= 3.3 V 2 5.5
CC
V
= 5 V 2.4 5.5
CC
MAX3238EC 0 70
MAX3238EI –40 85
= 3.3 V ± 0.3 V; and C1 = 0.047 µ F
CC
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6 )
PARAMETER TEST CONDITIONS MIN TYP
I
Input leakage current FORCEOFF, FORCEON ± 0.01 ± 1 µ A
I
Auto-powerdown plus No load,
disabled FORCEOFF and FORCEON at V
Supply current Powered off No load, FORCEOFF at GND 1 10
I
CC
(T
= 25 ° C)
A
Auto-powerdown plus
enabled
(1) Testing supply conditions are C1–C4 = 0.1 µ F at V
and C2–C4 = 0.33 µ F at V
(2) All typical values are at V
CC
= 3.3 V or V
CC
= 5 V ± 0.5 V.
= 5 V, and TA= 25 ° C.
CC
No load, FORCEOFF at VCC,
FORCEON at GND, 1 10
All RIN are open or grounded
= 3.3 V ± 0.15 V; C1–C4 = 0.22 µ F at V
CC
CC
= 3.3 V ± 0.3 V; and C1 = 0.047 µ F
CC
(2)
MAX UNIT
0.5 2 mA
µ A
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MAX3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ± 15-kV ESD (HBM) PROTECTION
SLLS710A – FEBRUARY 2006 – REVISED APRIL 2006
DRIVER SECTION
xxx
Electrical Characteristics
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6 )
PARAMETER TEST CONDITIONS MIN TYP
V
High-level output voltage All DOUT at RL= 3 k Ω to GND 5 5.4 V
OH
V
Low-level output voltage All DOUT at RL= 3 k Ω to GND –5 –5.4 V
OL
I
High-level input current VI= V
IH
I
Low-level input current VIat GND ± 0.01 ± 1 µ A
IL
I
Short-circuit output current
OS
r
Output resistance VCC, V+, and V– = 0 V, VO= ± 2 V 300 10M Ω
o
I
Output leakage current FORCEOFF = GND µ A
OZ
(1) Testing supply conditions are C1–C4 = 0.1 µ F at V
and C2–C4 = 0.33 µ F at V
(2) All typical values are at V
(3) 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.
CC
= 3.3 V or V
CC
(1)
V
CC
(3)
V
CC
= 5 V ± 0.5 V.
(2)
CC
± 0.01 ± 1 µ A
= 3.6 V, VO= 0 V ± 35 ± 60
= 5.5 V, VO= 0 V ± 40 ± 100
CC
= 5 V, and TA= 25 ° C.
CC
VO= ± 12 V, V
VO= ± 10 V, V
= 3.3 V ± 0.15 V; C1–C4 = 0.22 µ F at V
= 3 V to 3.6 V ± 25
CC
= 4.5 V to 5.5 V ± 25
CC
= 3.3 V ± 0.3 V; and C1 = 0.047 µ F
CC
MAX UNIT
mA
Switching Characteristics
(1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6 )
PARAMETER TEST CONDITIONS MIN TYP
Maximum data rate 250 400 kbit/s
t
sk(p)
SR(tr) V/ µ s
Pulse skew
Slew rate, transition region V
(see Figure 1) RL= 3 k Ω to 7 k Ω
(3)
(1) Testing supply conditions are C1–C4 = 0.1 µ F at V
and C2–C4 = 0.33 µ F at V
(2) All typical values are at V
(3) Pulse skew is defined as |t
CC
CC
PLH
CL= 1000 pF, RL= 3 k Ω ,
One DOUT switching, See Figure 1
CL= 150 pF to 2500 pF, RL= 3 k Ω to 7 k Ω ,
See Figure 2
= 3.3 V,
CC
= 3.3 V ± 0.15 V; C1–C4 = 0.22 µ F at V
= 5 V ± 0.5 V.
= 3.3 V or V
– t
CC
| of each channel of the same device.
PHL
CC
= 5 V, and TA= 25 ° C.
CL= 150 pF to 1000 pF 6 30
CL= 150 pF to 2500 pF 4 30
= 3.3 V ± 0.3 V; and C1 = 0.047 µ F
CC
(2)
MAX UNIT
100 ns
ESD Protection
PARAMETER TEST CONDITIONS TYP UNIT
HBM ± 15
DOUT IEC 61000-4-2, Air-Gap Discharge ± 15 kV
IEC 61000-4-2, Contact Discharge ± 8
6
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