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ISL43485IBZ

P1-P3P4-P6P7-P9P10-P11
1
®
FN6071.1
ISL43485
3.3V, Low Power, 30Mbps, RS-485/RS-422
Transceiver
The Intersil ISL43485 is a high speed BiCMOS 3.3V
powered, single transceiver that meets both the RS-485 and
RS-422 standards for balanced communication. Unlike
some competitive devices, this Intersil transceiver is
specified for 10% tolerance supplies (3V to 3.6V).
Data rates up to 30Mbps are achievable by using this
transceiver, which features higher slew rates.
Logic inputs (e.g., DI and DE) accept signals in excess of
5.5V, making them compatible with 5V logic families.
Receiver (Rx) inputs feature a “fail-safe if open” design,
which ensures a logic high output if Rx inputs are floating,
and the ISL43485 presents a “single unit load” to the RS-485
bus, which allows up to 32 transceivers on the network.
Driver (Tx) outputs are short circuit protected, even for
voltages exceeding the power supply voltage. Additionally,
on-chip thermal shutdown circuitry disables the Tx outputs to
prevent damage if power dissipation becomes excessive.
Features
• High Data Rate. . . . . . . . . . . . . . . . . . . . . . up to 30Mbps
• Operates from a Single +3.3V Supply (10% Tolerance)
• Interoperable with 5V Logic
• Single Unit Load Allows up to 32 Devices on the Bus
• Low Current Shutdown Mode. . . . . . . . . . . . . . . . . . 15nA
• -7V to +12V Common Mode Input Voltage Range
• Three State Rx and Tx Outputs
• 10ns Propagation Delay, 1ns Skew
• Half Duplex Pinout
• Current Limiting and Thermal Shutdown for driver
Overload Protection
• Pb-Free Available (RoHS Compliant)
Applications
• SCSI “Fast 20” Drivers and Receivers
• Factory Automation
• Data Loggers
• Security Networks
• Building Environmental Control Systems
• Industrial/Process Control Networks
• Level Translators
Pinout
ISL43485 (SOIC)
TOP VIEW
RO
RE
DE
DI
1
2
3
4
8
7
6
5
V
CC
B/Z
A/Y
GND
D
R
Ordering Information
PART NO.
(BRAND)
TEMP.
RANGE (°C) PACKAGE
PKG.
DWG. #
ISL43485IB
(43485IB)
-40 to 85 8 Ld SOIC M8.15
ISL43485IBZ
(43485IB) (Note)
-40 to 85 8 Ld SOIC (Pb-free) M8.15
ISL43485IB-T
(43485IB)
-40 to 85 8 Ld SOIC
Tape and Reel
M8.15
ISL43485IBZ-T
(43485IB) (Note)
-40 to 85 8 Ld SOIC
Tape and Reel (Pb-free)
M8.15
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.
Data Sheet March 15, 2005
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. 2004, 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
2
FN6071.1
March 15, 2005
Truth Tables
TRANSMITTING
INPUTS OUTPUTS
RE
DE DI Z Y
X1101
X1010
0 0 X High-Z High-Z
1 0 X High-Z * High-Z *
NOTE: *Shutdown Mode
RECEIVING
INPUTS OUTPUT
RE
DE A-B RO
00≥ +0.2V 1
00≤ -0.2V 0
0 0 Inputs Open 1
1 0 X High-Z *
1 1 X High-Z
NOTE: *Shutdown Mode
Pin Descriptions
PIN FUNCTION
RO Receiver output: If A > B by at least 0.2V, RO is high; If A < B by 0.2V or more, RO is low; RO = High if A and B are unconnected (floating).
RE
Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high.
DE Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low.
DI Driver input. A low on DI forces output Y low and output Z high. Similarly, a high on DI forces output Y high and output Z low.
GND Ground connection.
A/Y Noninverting receiver input and noninverting driver output. Pin is an input if DE = 0; pin is an output if DE = 1.
B/Z Inverting receiver input and inverting driver output. Pin is an input if DE = 0; pin is an output if DE = 1.
V
CC
System power supply input (3V to 3.6V).
Typical Operating Circuit
ISL43485
0.1µF
+
D
R
7
6
8
1
2
3
4
5
V
CC
GND
RO
RE
DE
DI
A/Y
B/Z
+3.3V
0.1µF
+
D
R
6
7
8
1
2
3
4
5
V
CC
GND
RO
RE
DE
DI
A/Y
B/Z
+3.3V
R
T
R
T
ISL43485
3
FN6071.1
March 15, 2005
Absolute Maximum Ratings Thermal Information
V
CC
to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input Voltages
DI, DE, RE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +7V
Input/Output Voltages
A/Y, B/Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +12.5V
RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to (V
CC
+0.5V)
Short Circuit Duration
Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
Operating Conditions
Temperature Range
ISL43485I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to 85°C
Thermal Resistance (Typical, Note 1)
θ
JA
(°C/W)
8 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . 170
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)
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:
1. 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 3.6V; Unless Otherwise Specified. Typicals are at V
CC
= 3.3V, T
A
= 25°C,
Note 2
PARAMETER SYMBOL TEST CONDITIONS
TEMP
(°C) MIN TYP MAX UNITS
DC CHARACTERISTICS
Driver Differential V
OUT
(no load) V
OD1
Full - - V
CC
V
Driver Differential V
OUT
(with load) V
OD2
R
L
= 100Ω (RS-422) (Figure 1A) Full 2 2.7 - V
R
L
= 54Ω (RS-485) (Figure 1A) Full 1.5 2.3 V
CC
V
R
L
= 60Ω, -7V ≤ V
CM
≤ 12V (Figure 1B) Full 1.5 2.6 - V
Change in Magnitude of Driver
Differential V
OUT
for
Complementary Output States
∆V
OD
R
L
= 54Ω or 100Ω (Figure 1A) Full - 0.01 0.2 V
Driver Common-Mode V
OUT
V
OC
R
L
= 54Ω or 100Ω (Figure 1A) Full - 1.8 3 V
Change in Magnitude of Driver
Common-Mode V
OUT
for
Complementary Output States
∆V
OC
R
L
= 54Ω or 100Ω (Figure 1A) Full - 0.01 0.2 V
Logic Input High Voltage V
IH
DE, DI, RE Full 2 - - V
Logic Input Low Voltage V
IL
DE, DI, RE Full - - 0.8 V
Logic Input Current I
IN1
DE, DI Full -2 - 2 µA
RE
Full -25 - 25 µA
Input Current (A/Y, B/Z) I
IN2
DE = 0V, V
CC
= 0V or 3.6V V
IN
= 12V Full - 0.6 1 mA
V
IN
= -7V Full - -0.3 -0.8 mA
Receiver Differential Threshold
Voltage
V
TH
-7V ≤ V
CM
≤ 12V Full -0.2 - 0.2 V
Receiver Input Hysteresis ∆V
TH
V
CM
= 0V 25 - 50 - mV
Receiver Output High Voltage V
OH
I
O
= -4mA, V
ID
= 200mV Full V
CC
-
0.4
--V
Receiver Output Low Voltage V
OL
I
O
= -4mA, V
ID
= 200mV Full - - 0.4 V
ISL43485
P1-P3P4-P6P7-P9P10-P11

ISL43485IBZ

Mfr. #:
Buy ISL43485IBZ
Manufacturer:
Renesas / Intersil
Description:
RS-422/RS-485 Interface IC HI SPD 8LD -40+85 3V RS-485 TRANS 1T
Lifecycle:
New from this manufacturer.
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