Datasheet
ISL3232E, ISL4221E, ISL4223E
QFN Packaged, ±15kV ESD Protected, +2.7V to +5.5V, 150nA, 250kbps,
RS-232 Transmitters/Receivers
The
ISL3232E, ISL4221E,
and
ISL4223E
devices are
2.7V to 5.5V powered RS-232 transmitters/receivers
that meet ElA/TIA-232 and V.28/V.24 specifications,
even at V
CC
= 3.0V. They provide ±15kV ESD
protection (IEC61000-4-2 Air Gap and Human Body
Model) on transmitter outputs and receiver inputs
(RS-232 pins). Targeted applications are PDAs,
Palmtops, and hand-held products where the low
operational power consumption and even lower
standby power consumption are critical. Efficient
on-chip charge pumps, coupled with manual and
automatic powerdown functions, reduce the standby
supply current to a 150nA trickle. The 5mmx5mm
Quad Flat No-Lead (QFN) packaging and the use of
small, low value capacitors ensure board space
savings. Data rates greater than 250kbps are ensured
at worst case load conditions.
The ISL4221E is a 1 driver, 1 receiver device and the
ISL3232E and ISL4223E are 2 driver, 2 receiver
devices that, coupled with the 5mmx5mm QFN
package, provide the industry’s smallest, lowest
power serial port suitable for PDAs, and hand-held
applications. The 5mmx5mm QFN requires 40% less
board area than a 20 Ld TSSOP, and is nearly 20%
thinner.
The ISL4221E and ISL4223E versions feature an
automatic powerdown function that powers down the
on-chip power supply and driver circuits. Automatic
powerdown occurs when an attached peripheral
device is shut off or the RS-232 cable is removed, and
conserves system power automatically without
changes to the hardware or operating system. The
ISL4221E and ISL4223E power back up automatically
when a valid RS-232 voltage is applied to any
receiver input.
Table 1
summarizes the features of the IC’s and
AN9863 summarizes the features of each device
comprising the 3V RS-232 family.
Table 1.
Summary of Features
Number Number
of Tx.
of Rx.
1
2
2
1
2
2
QFN Pkg.
Available?
Yes
Yes
Yes
Data Rate (kbps)
250
250
250
Rx. Enable
Function?
Yes
No
Yes
Manual
Powerdown?
Yes
No
Yes
Automatic Powerdown
Function?
Yes
No
Yes
Features
• Available in near chip scale QFN (5mmx5mm)
package, which is 40% smaller than a 20 Ld
TSSOP
• ESD protection for RS-232 I/O pins to ±15kV
(IEC61000)
• Meets EIA/TIA-232 and V.28/V.24 specifications at
3V
• RS-232 compatible with V
CC
= 2.7V
• On-chip voltage converters require only four
external 0.1µF capacitors
• Manual and automatic powerdown features (except
ISL3232E)
• Receiver hysteresis for improved noise immunity
• Assured minimum data rate: 250kbps
• Wide power supply range: single +2.7V to +5.5V
• Low supply current in powerdown state: 150nA
• Pb-free (RoHS compliant)
Applications
• Any space-constrained system requiring RS-232
ports
○ Battery powered and portable equipment
○ Hand-held products (GPS receivers, bar code
scanners, etc.)
○ PDAs and Palmtops, data cables
○ Cellular/mobile phones, digital cameras
Related Literature
For a full list of related documents, visit our website:
•
ISL3232E, ISL4221E,
and
ISL4223E
device pages
Part Number
ISL4221E
ISL3232E
ISL4223E
FN6045 Rev.7.00
May.2.19
Page 1 of 24
ISL3232E, ISL4221E, ISL4223E
Contents
1.
1.1
1.2
1.3
1.4
2.
2.1
2.2
2.3
2.4
3.
4.
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Typical Operating Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
4
5
6
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7
7
7
7
Typical Performance Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Application Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1
4.1.1
4.2
4.3
4.4
4.5
4.5.1
4.5.2
4.5.3
4.6
4.7
4.8
4.9
4.10
4.11
Charge Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charge Pump Abs Max Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Power Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powerdown Functionality (Excluding ISL3232E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Software Controlled (Manual) Powerdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Powerdown (Excluding ISL3232E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INVALID Output (Excluding ISL3232E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Capacitor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply Decoupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitter Outputs when Exiting Powerdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation Down to 2.7V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Data Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interconnection with 3V and 5V Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
11
12
13
13
14
14
15
15
16
16
16
17
17
18
5.
5.1
5.2
5.3
5.4
6.
7.
8.
±15kV ESD Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Human Body Model (HBM) Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IEC61000-4-2 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air-Gap Discharge Test Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contact Discharge Test Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19
19
19
19
Die Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Package Outline Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
FN6045 Rev.7.00
May.2.19
Page 2 of 24
ISL3232E, ISL4221E, ISL4223E
1. Overview
1.
1.1
Overview
Typical Operating Circuits
ISL3232E
+3.3V
+
+
0.1µF
15
1
2
+
3
9
8
C1+
C1-
C2+
C2-
T
1
T
2
V-
14
V
CC
V+
16
C
+
3
0.1µF
C
4
0.1µF
+
T1
OUT
T2
OUT
RS-232
Levels
C
1
0.1µF
C
2
0.1µF
4
12
5
T1
IN
T2
IN
TTL/CMOS
Logic Levels
R1
OUT
10
R
1
5kΩ
11
R1
IN
R2
OUT
7
R
2
5kΩ
6
R2
IN
GND
13
ISL4221E
+3.3V
+
0.1µF
13
V
CC
V+
1
+ C
3
0.1µF
C
4
C
1
0.1µF
C
2
0.1µF
16
+ C1+
2
C1-
3
+ C2+
4
C2-
9
V- 5
T
1
11
+ 0.1µF
T1
OUT
R1
IN
RS-232
Levels
TTL/CMOS
Logic
Levels
T1
IN
R1
OUT
7
R
1
15 EN
FORCEOFF
10
FORCEON
GND
12
INVALID
5kΩ
6
14
8
V
CC
To Power
Control Logic
FN6045 Rev.7.00
May.2.19
Page 3 of 24
ISL3232E, ISL4221E, ISL4223E
ISL4223E
+3.3V
+
0.1µF
20
2
3
4
11
10
C1+
C1-
C2+
C2-
T
1
T
2
V-
17
V
CC
V+
1
C
+
3
0.1µF
C
4
0.1µF
+
T1
OUT
T2
OUT
RS-232
Levels
1. Overview
C
1
0.1µF
C
2
0.1µF
+
+
5
15
6
T1
IN
T2
IN
TTL/CMOS
Logic Levels
R1
OUT
13
R
1
5kΩ
14
R1
IN
R2
OUT
8
19
EN
R
2
5kΩ
7
R2
IN
FORCEOFF
12
FORCEON
GND
16
INVALID
18
9
V
CC
To Power
Control Logic
1.2
Ordering Information
Part Marking
ISL3232 EIRZ
ISL3232 EIRZ
ISL3232 EIRZ
ISL4221 EIRZ
ISL4221 EIRZ
ISL4223 EIRZ
ISL4223 EIRZ
ISL4223 EIRZ
ISL4223 EIRZ
Temp. Range (°C)
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
Tape and Reel
(Units) (Note
1)
-
6k
250
-
6k
-
6k
1k
250
Package
(RoHS Compliant)
16 Ld QFN
16 Ld QFN
16 Ld QFN
16 Ld QFN
16 Ld QFN
20 Ld QFN
20 Ld QFN
20 Ld QFN
20 Ld QFN
Pkg. Dwg. #
L16.5x5B
L16.5x5B
L16.5x5B
L16.5x5B
L16.5x5B
L20.5x5
L20.5x5
L20.5x5
L20.5x5
Part Number
(Notes
2, 3)
ISL3232EIRZ
ISL3232EIRZ-T
ISL3232EIRZ-T7A
ISL4221EIRZ
ISL4221EIRZ-T
ISL4223EIRZ
ISL4223EIRZ-T
ISL4223EIRZ-TK
ISL4223EIRZ-T7A
Notes:
1. See
TB347
for details about reel specifications.
2. These Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations).
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC
J-STD-020.
3. For Moisture Sensitivity Level (MSL), see the
ISL3232E, ISL4221E,
and
ISL4223E
device pages. For more information about MSL, see
TB363.
FN6045 Rev.7.00
May.2.19
Page 4 of 24
ISL3232E, ISL4221E, ISL4223E
1. Overview
1.3
Pin Configurations
ISL3232E
(16 Ld QFN)
Top View
GND
VCC
C1+
V+
ISL4221E
(16 Ld QFN)
Top View
FORCEOFF
14
C1-
C2+
C2-
V-
1
2
PD
3
4
5
T2OUT
6
R2IN
7
R2OUT
8
T2IN
12 T1OUT
11 R1IN
10 R1OUT
9
T1IN
V+
C1-
C2+
C2-
1
2
16
15
VCC
13
12 GND
11 T1OUT
10 FORCEON
9
T1IN
8
INVALID
C1+
EN
6
R1IN
16
15
14
13
PD
3
4
5
V-
7
R1OUT
ISL4223E
(20 Ld QFN)
Top View
FORCEOFF
20
V+
C1-
C2+
C2-
V-
1
2
3
4
5
6
T2OUT
19
18
17
GND
16
15 T1OUT
14 R1IN
13 R1OUT
12 FORCEON
11 T1IN
10
T2IN
PD
7
R2IN
8
R2OUT
FN6045 Rev.7.00
May.2.19
INVALID
VCC
9
C1+
EN
Page 5 of 24
京公网安备 11010802033920号
EEWORLD
