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
FEATURES
DB, DW, OR PW PACKAGE
•
RS-232 Bus-Pin ESD Protection Exceeds
(TOP VIEW)
±15 kV Using Human-Body Model (HBM)
C2+
GND
C2−
C1+
27 V+
26
1
28
•
Meet or Exceed the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
2
3
V
CC
•
•
•
•
Operate With 3-V to 5.5-V VCC Supply
Operate up to 1000 kbit/s
V−
4
25 C1−
DOUT1
DOUT2
DOUT3
RIN1
5
24 DIN1
Five Drivers and Three Receivers
6
23
22
21
20
19
18
17
16
15
DIN2
Auto-Powerdown Plus Feature Enables
Flexible Power-Down Mode
7
DIN3
8
ROUT1
ROUT2
DIN4
9
RIN2
DOUT4
RIN3
•
•
•
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Low Standby Current . . . 1 µA Typical
External Capacitors . . . 4 × 0.1 µF
10
11
12
13
14
ROUT3
DIN5
Accept 5-V Logic Input With 3.3-V Supply
DOUT5
FORCEON
FORCEOFF
Always-Active Noninverting Receiver Output
(ROUT1B)
ROUT1B
INVALID
•
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
RHB PACKAGE
(TOP VIEW)
APPLICATIONS
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•
•
•
•
•
•
•
•
Battery-Powered Systems
PDAs
Notebooks
Subnotebooks
Laptops
Palmtop PCs
Hand-Held Equipment
Modems
32 31 30 29 28 27 26 25
1
2
3
4
5
6
7
8
24
DOUT1
DOUT2
DOUT3
RIN1
RIN2
DOUT4
RIN3
C1–
DIN1
DIN2
DIN3
ROUT1
ROUT2
DIN4
23
22
21
20
19
18
17
Printers
NC
ROUT3
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
Copyright © 2006, Texas Instruments Incorporated
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.