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ISL4485EIBZ-T

P1-P3P4-P6P7-P9P10-P11
1
®
FN6049.3
ISL4485E
±
15kV ESD Protected, 20Mbps, 5V, Low
Power, RS-485/RS-422 Transceiver
The Intersil ISL4485E is a high speed, BiCMOS 5V
powered, single transceiver that meets both the RS-485 and
RS-422 standards for balanced communication. Each driver
output/receiver input is protected against ±15kV ESD
strikes, without latch-up. Unlike competitive devices, this
Intersil device is specified for 10% tolerance supplies (4.5V
to 5.5V).
The excellent differential output voltage coupled with high
drive-current output stages allow 20Mbps operation over
twisted pair networks up to 450 feet in length. The 25kΩ
receiver input resistance presents a “single unit load” to the
RS-485 bus, allowing up to 32 transceivers on the network.
Receiver (Rx) inputs feature a “fail-safe if open” design,
which ensures a logic high Rx output if Rx inputs are
floating.
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.
The half duplex configuration multiplexes the Rx inputs and
Tx outputs to allow transceivers with Rx and Tx disable
functions in 8 lead packages.
Features
• Pb-Free Available (RoHS Compliant)
• High Data Rates. . . . . . . . . . . . . . . . . . . . . up to 20Mbps
• RS-485 I/O Pin ESD Protection . . . . . . . . . . ±15kV HBM
- Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM
• Operates from a Single +5V Supply (10% Tolerance)
• 1 Unit Load Allows up to 32 Devices on the Bus
• Low Quiescent Current . . . . . . . . . . . . . . . . . . . . . 700
µA
• -7V to +12V Common Mode Input Voltage Range
• Three State Rx and Tx Outputs
• 30ns Propagation Delays, 2ns Skew
• Current Limiting and Thermal Shutdown for driver
Overload Protection
Applications
• SCSI “Fast 20” Drivers and Receivers
• Data Loggers
• Security Networks
• Building Environmental Control Systems
• Industrial/Process Control Networks
• Level Translators
Pinout
ISL4485E (SOIC)
TOP VIEW
Ordering Information
PART NO.
(BRAND)
TEMP.
RANGE (
o
C) PACKAGE PKG. DWG. #
ISL4485EIB
(4485EIB)
-40 to 85 8 Ld SOIC M8.15
ISL4485EIBZ
(4485EIBZ)
(See Note)
-40 to 85 8 Ld SOIC
(Pb-free)
M8.15
ISL4485EIB-T
(4485EIB)
-40 to 85 8 Ld SOIC
Tape & Reel
M8.15
ISL4485EIBZ-T
(4485EIBZ)
(See Note)
-40 to 85 8 Ld SOIC
Tape & 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.
RO
RE
DE
DI
1
2
3
4
8
7
6
5
V
CC
B / Z
A / Y
GND
D
R
Data Sheet April 21, 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
Truth Tables
TRANSMITTING
INPUTS OUTPUTS
RE
DE DI B/Z A/Y
X1101
X1010
X 0 X High-Z High-Z
RECEIVING
INPUTS OUTPUT
RE
DE A-B RO
00≥ +0.2V 1
00≤ -0.2V 0
0 0 Inputs Open 1
1 X X High-Z
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 ±15kV HBM ESD Protected, noninverting receiver input and noninverting driver output. Pin is an input (A) if DE = 0; pin is an output
(Y) if DE = 1.
B/Z ±15kV HBM ESD Protected, inverting receiver input and inverting driver output. Pin is an input (B) if DE = 0; pin is an output (Z) if
DE = 1.
V
CC
System power supply input (4.5V to 5.5V).
Typical Operating Circuit
0.1µF
+
D
R
7
6
8
1
2
3
4
5
V
CC
GND
RO
RE
DE
DI
A/Y
B/Z
+5V
0.1µF
+
D
R
6
7
8
1
2
3
4
5
V
CC
GND
RO
RE
DE
DI
A/Y
B/Z
+5V
R
T
R
T
ISL4485E
ISL4485E
3
Absolute Maximum Ratings Thermal Information
V
CC
to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input Voltages
DI, DE, RE
. . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to (V
CC
+0.5V)
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
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table
Operating Conditions
Temperature Range
ISL4485EIB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40
o
C to 85
o
C
Thermal Resistance (Typical, Note 1)
θ
JA
(
o
C/W)
8 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . 170
Maximum Junction Temperature (Plastic Package) . . . . . . . 150
o
C
Maximum Storage Temperature Range . . . . . . . . . -65
o
C to 150
o
C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300
o
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
= 4.5V to 5.5V; Unless Otherwise Specified.
Typicals are at V
CC
= 5V, T
A
= 25
o
C, Note 2
PARAMETER SYMBOL TEST CONDITIONS
TEMP
(
o
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 = 50Ω (RS-422), (Figure 1) Full 2 3 - V
R = 27Ω (RS-485), (Figure 1) Full 1.5 2.3 5 V
Change in Magnitude of Driver
Differential V
OUT
for
Complementary Output States
∆V
OD
R = 27Ω or 50Ω, (Figure 1) Full - 0.01 0.2 V
Driver Common-Mode V
OUT
V
OC
R = 27Ω or 50Ω, (Figure 1) Full - - 3 V
Change in Magnitude of Driver
Common-Mode V
OUT
for
Complementary Output States
∆V
OC
R = 27Ω or 50Ω, (Figure 1) 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, RE Full -25 - 25 µA
Input Current (A, B), (Note 5) I
IN2
DE = 0V, V
CC
= 0V or
4.5 to 5.5V
V
IN
= 12V Full - - 1 mA
V
IN
= -7V Full - - -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 - 70 - mV
Receiver Output High Voltage V
OH
I
O
= -4mA, V
ID
= 200mV Full 3.5 4 - V
Receiver Output Low Voltage V
OL
I
O
= -4mA, V
ID
= 200mV Full - 0.1 0.4 V
Three-State (high impedance)
Receiver Output Current
I
OZR
0.4V ≤ V
O
≤ 2.4V Full - - ±1 µA
Receiver Input Resistance R
IN
-7V ≤ V
CM
≤ 12V Full 12 25 - kΩ
No-Load Supply Current, (Note 3) I
CC
DI, RE = 0V or V
CC
DE = V
CC
Full - 700 900 µA
DE = 0V Full - 500 565 µA
Driver Short-Circuit Current,
V
O
= High or Low
I
OSD1
DE = V
CC
, -7V ≤ V
Y
or V
Z
≤ 12V, (Note 4) Full 35 - 250 mA
Receiver Short-Circuit Current I
OSR
0V ≤ V
O
≤ V
CC
Full 7 - 85 mA
ISL4485E
P1-P3P4-P6P7-P9P10-P11

ISL4485EIBZ-T

Mfr. #:
Buy ISL4485EIBZ-T
Manufacturer:
Renesas / Intersil
Description:
RS-422/RS-485 Interface IC 8LD 15KV HBM 5V RS-485 20 MBPS TR
Lifecycle:
New from this manufacturer.
Delivery:
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