D ts e t
aa h e
R c e t r lc r nc
o h se Ee to is
Ma u a t r dCo o e t
n fc u e
mp n n s
R c e tr b a d d c mp n ns ae
o h se rn e
o oet r
ma ua trd u ig ete dewaes
n fcue sn i r i/ fr
h
p rh s d f m te oiia s p l r
uc a e r
o h r n l u pi s
g
e
o R c e tr waes rce td f m
r o h se
fr e rae r
o
te oiia I. Al rce t n ae
h
r nl P
g
l e rai s r
o
d n wi tea p o a o teOC
o e t h p rv l f h
h
M.
P r aetse u igoiia fcoy
at r e td sn r n la tr
s
g
ts p o rmso R c e tr e eo e
e t rga
r o h se d v lp d
ts s lt n t g aa te p o u t
e t oui s o u rne
o
rd c
me t o e c e teOC d t s e t
es r x e d h
M aa h e.
Qu l yOv riw
ai
t
e ve
• IO- 0 1
S 90
•A 92 cr ct n
S 1 0 et ai
i
o
• Qu l e Ma ua trr Ls (
ai d
n fcues it QML MI- R -
) LP F
385
53
•C a sQ Mitr
ls
lay
i
•C a sVS a eL v l
ls
p c ee
• Qu l e S p l r Ls o D sr uos( L )
ai d u pi s it f it b tr QS D
e
i
•R c e trsacic l u pir oD A a d
o h se i
r ia s p l t L n
t
e
me t aln u t a dD A sa d r s
es lid sr n L tn ad .
y
R c e tr lcrnc , L i c mmi e t
o h se Ee t is L C s o
o
tdo
t
s p ligp o u t ta s t f c so r x e t-
u pyn rd cs h t ai y u tme e p ca
s
t n fr u lya daee u loto eoiial
i s o q ai n r q a t h s r n l
o
t
g
y
s p l db id sr ma ua trr.
u pi
e yn ut
y n fcues
T eoiia ma ua trr d ts e t c o a yn ti d c me t e e t tep r r n e
h r n l n fcue’ aa h e a c mp n ig hs o u n r cs h ef ma c
g
s
o
a ds e ic t n o teR c e tr n fcue v rino ti d vc . o h se Ee t n
n p c ai s f h o h se ma ua trd eso f hs e ie R c e tr lcr -
o
o
isg aa te tep r r n eo i s mio d co p o u t t teoiia OE s e ic -
c u rne s h ef ma c ft e c n u tr rd cs o h r n l M p c a
o
s
g
t n .T pc lv le aefr eee c p r o e o l. eti mii m o ma i m rt g
i s ‘y ia’ au s r o rfrn e up s s ny C r n nmu
o
a
r xmu ai s
n
ma b b s do p o u t h rceiain d sg , i lt n o s mpetsig
y e a e n rd c c aa tr t , e in smuai , r a l e t .
z o
o
n
© 2 1 R cetr l t n s LC Al i t R sre 0 1 2 1
0 3 ohs E cr i , L . lRg s eevd 7 1 0 3
e e oc
h
T l r m r, l s v iw wrcl . m
o e n oe p ae it w . e c o
a
e
s
o ec
®
ISL83385E
Data Sheet
March 15, 2005
FN6001.3
±15kV ESD Protected, +3V to +5.5V,
1 Microamp, 250kbps,
RS-232 Transmitters/Receivers
The Intersil ISL83385E contains 3.0V to 5.5V powered
RS-232 transmitters/receivers which meet ElA/TIA-232 and
V.28/V.24 specifications, even at V
CC
= 3.0V. Targeted
applications are PDAs, Palmtops, and notebook and laptop
computers where the low operational, and even lower
standby, power consumption is critical. Efficient on-chip
charge pumps, coupled with a manual powerdown function
reduces the standby supply current to a 1µA trickle. Small
footprint packaging, and the use of small, low value
capacitors ensure board space savings as well. Data rates
greater than 250kbps are guaranteed at worst case load
conditions. This device is fully compatible with 3.3V only
systems, mixed 3.3V and 5.0V systems, and 5.0V only
systems.
The single pin powerdown function (SHDN = 0) disables all
the transmitters, while shutting down the charge pump to
minimize supply current drain.
Table 1 summarizes the features of the ISL83385E, while
Application Note AN9863 summarizes the features of each
device comprising the 3V RS-232 family.
Features
• ESD Protection for RS-232 I/O Pins to
±
15kV (IEC61000)
• Low Power, Pin Compatible Upgrade for MAX3385E
• Single SHDN Pin Disables Transmitters
• RS-232 Compatible Outputs at 2.7V
• Receivers Active in Powerdown
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• Latch-Up Free
• On-Chip Voltage Converters Require Only Four External
0.1µF Capacitors
• Receiver Hysteresis For Improved Noise Immunity
• Very Low Supply Current . . . . . . . . . . . . . . . . . . . . 0.3mA
• Guaranteed Minimum Data Rate . . . . . . . . . . . . . 250kbps
• Guaranteed Minimum Slew Rate . . . . . . . . . . . . . . . 6V/µs
• Wide Power Supply Range . . . . . . . Single +3V to +5.5V
• Low Supply Current in Powerdown State. . . . . . . . . .<1µA
• Pb-Free Available (RoHS Compliant)
Applications
• Any System Requiring RS-232 Communication Ports
- Battery Powered, Hand-Held, and Portable Equipment
- Laptop Computers, Notebooks, Palmtops
- Modems, Printers and other Peripherals
- Digital Cameras
- Cellular/Mobile Phones
Ordering Information
PART
NUMBER
ISL83385ECA
ISL83385ECAZ
(See Note)
ISL83385EIA
ISL83385EIAZ
(See Note)
ISL83385EIB
TEMP.
RANGE (°C)
0 to 70
0 to 70
-40 to 85
-40 to 85
-40 to 85
PACKAGE
20 Ld SSOP
20 Ld SSOP
(Pb-free)
20 Ld SSOP
20 Ld SSOP
(Pb-free)
18 Ld SOIC
PKG.
DWG. #
M20.209
M20.209
M20.209
M20.209
M18.3
Add “-T” suffix for tape and reel.
NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which are RoHS compliant and compatible
with both SnPb and Pb-free soldering operations. Intersil 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.
TABLE 1. SUMMARY OF FEATURES
NO. OF NO. OF
Tx.
Rx.
2
2
NO. OF
MONITOR Rx.
(R
OUTB
)
0
DATA
RATE
(kbps)
250
Rx. ENABLE
FUNCTION?
No
READY
OUTPUT?
No
MANUAL
POWER-
DOWN?
Yes
AUTOMATIC
POWERDOWN
FUNCTION?
No
PART NUMBER
ISL83385E
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2001, 2004, 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ISL83385E
Pinouts
ISL83385E (SOIC)
TOP VIEW
NC 1
C1+ 2
V+
3
18 SHDN
17 V
CC
16 GND
15 T1
OUT
14 R1
IN
13 R1
OUT
12 T1
IN
11 T2
IN
10 R2
OUT
NC 1
C1+ 2
V+
3
ISL83385E (SSOP)
TOP VIEW
20 SHDN
19 V
CC
18 GND
17 T1
OUT
16 R1
IN
15 R1
OUT
14 T1
IN
13 T2
IN
12 R2
OUT
11 NC
C1- 4
C2+ 5
C2- 6
V-
7
C1- 4
C2+ 5
C2- 6
V-
7
T2
OUT
8
R2
IN
9
T2
OUT
8
R2
IN
9
NC 10
Pin Descriptions
PIN
V
CC
V+
V-
GND
C1+
C1-
C2+
C2-
T
IN
T
OUT
R
IN
R
OUT
SHDN
System power supply input (3.0V to 5.5V).
Internally generated positive transmitter supply (+5.5V).
Internally generated negative transmitter supply (-5.5V).
Ground connection.
External capacitor (voltage doubler) is connected to this lead.
External capacitor (voltage doubler) is connected to this lead.
External capacitor (voltage inverter) is connected to this lead.
External capacitor (voltage inverter) is connected to this lead.
TTL/CMOS compatible transmitter Inputs.
±15kV
ESD Protected
,
RS-232 level (nominally
±5.5V)
transmitter outputs.
±15kV
ESD Protected
,
RS-232 compatible receiver inputs.
TTL/CMOS level receiver outputs.
Active low input to shut down transmitters and on-board power supply, to place device in low power mode.
FUNCTION
2
FN6001.3
March 15, 2005
ISL83385E
Typical Operating Circuit
ISL83385E
(Note 2)
C
3
(OPTIONAL CONNECTION, NOTE 1)
+3.3V to +5V
+
0.1µF
2
+
4
5
+
6
12
11
C1+
C1-
C2+
C2-
T
1
T
2
V-
15
8
17
V
CC
3
V+
7
+
+
C
3
0.1µF
C
4
0.1µF
+
T1
OUT
T2
OUT
RS-232
LEVELS
14
R
1
R2
OUT
10
R
2
5kΩ
18
5kΩ
9
R2
IN
R1
IN
GND
16
SHDN
V
CC
C
1
0.1µF
C
2
0.1µF
T1
IN
T2
IN
TTL/CMOS
LOGIC LEVELS
R1
OUT
13
NOTES:
1. The negative terminal of C
3
can be connected to either V
CC
or Gnd.
2. Pin numbers refer to SOIC package.
3
FN6001.3
March 15, 2005
ISL83385E
Absolute Maximum Ratings
V
CC
to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V
V+ to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V
V- to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3V to -7V
V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V
Input Voltages
T
IN
, SHDN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V
R
IN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±25V
Output Voltages
T
OUT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±13.2V
R
OUT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to V
CC
+0.3V
Short Circuit Duration
T
OUT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table
Thermal Information
Thermal Resistance (Typical, Note 3)
θ
JA
(°C/W)
18 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . .
75
20 Ld SSOP Package . . . . . . . . . . . . . . . . . . . . . . .
125
Maximum Junction Temperature (Plastic Package) . . . . . . . 150°C
Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300°C
(Lead Tips Only)
Operating Conditions
Temperature Range
ISL83385ECX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
ISL83385EIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to 85°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
3.
θ
JA
is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications
Test Conditions: V
CC
= 3V to 5.5V, C
1
- C
4
= 0.1
µ
F; Unless Otherwise Specified.
Typicals are at T
A
= 25°C
TEST CONDITIONS
TEMP
(°C)
MIN
TYP
MAX
UNITS
PARAMETER
DC CHARACTERISTICS
Supply Current, Enabled
Supply Current, Powerdown
All Outputs Unloaded, SHDN = V
CC
, V
CC
= 3.15V
SHDN = GND
25
25
-
-
0.3
1
1
10
mA
µA
LOGIC AND TRANSMITTER INPUTS
Input Logic Threshold Low
Input Logic Threshold High
T
IN
, SHDN
T
IN
, SHDN
V
CC
= 3.3V
V
CC
= 5.0V
Transmitter Input Hysteresis
Input Leakage Current
RECEIVER OUTPUTS
Output Voltage Low
Output Voltage High
RECEIVER INPUTS
Input Voltage Range
Input Threshold Low
V
CC
= 3.3V
V
CC
= 5.0V
Input Threshold High
V
CC
= 3.3V
V
CC
= 5.0V
Input Hysteresis
Input Resistance
TRANSMITTER OUTPUTS
Output Voltage Swing
Output Resistance
Output Short-Circuit Current
Output Leakage Current
V
OUT
=
±12V,
V
CC
= 0V or 3V to 5.5V, SHDN = GND
All Transmitter Outputs Loaded with 3kΩ to Ground
V
CC
= V+ = V- = 0V, Transmitter Output =
±2V
Full
Full
Full
Full
±5.0
300
-
-
±5.4
10M
±35
-
-
-
±60
±25
V
Ω
mA
µA
Full
25
25
25
25
25
25
-25
0.6
0.8
-
-
-
3
-
1.2
1.5
1.5
1.8
0.5
5
25
-
-
2.4
2.4
-
7
V
V
V
V
V
V
kΩ
I
OUT
= 1.6mA
I
OUT
= -1.0mA
Full
Full
-
-
0.4
-
V
V
T
IN
, SHDN
Full
Full
Full
25
Full
-
2.0
2.4
-
-
-
-
-
0.5
±0.01
0.8
-
-
-
±1.0
V
V
V
V
µA
V
CC
-0.6 V
CC
-0.1
4
FN6001.3
March 15, 2005
京公网安备 11010802033920号
EEWORLD
