Data Sheet ADM1490E/ADM1491E
Rev. D | Page 13 of 16
R
D
RO
RE
DI
DE
ADM1491E
ADM1491E
A
B
Z
Y
R
D
RO DIDE
A B Z Y
RE
R
D
RO
DI
DE
ADM1491E
MASTER SLAVE
SLAVE
A
B
Z
Y
RE
MAXIMUM NUMBER OF NODES = 32
ADM1491E
R
D
RO DIDE
A
B Z
Y
RE
SLAVE
NOTES
1. R
T
IS EQUAL TO THE CHARACTERISTIC IMPEDANCE OF THE CABLE.
R
T
07430-028
V
CC
V
CC
R
T
Figure 30. Typical RS-485 Full-Duplex Application
ADM1490E/ADM1491E Data Sheet
Rev. D | Page 14 of 16
OUTLINE DIMENSIONS
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
COMPLIANT TO JEDEC STANDARDS MS-012-AB
060606-A
14
8
7
1
6.20 (0.2441)
5.80 (0.2283)
4.00 (0.1575)
3.80 (0.1496)
8.75 (0.3445)
8.55 (0.3366)
1.27 (0.0500)
BSC
SEATING
PLANE
0.25 (0.0098)
0.10 (0.0039)
0.51 (0.0201)
0.31 (0.0122)
1.75 (0.0689)
1.35 (0.0531)
0.50 (0.0197)
0.25 (0.0098)
1.27 (0.0500)
0.40 (0.0157)
0.25 (0.0098)
0.17 (0.0067)
COPLANARITY
0.10
45°
Figure 31. 14-Lead Standard Small Outline Package [SOIC_N]
Narrow Body
(R-14)
Dimensions shown in millimeters and (inches)
COMPLIANT TO JEDEC STANDARDS MO-187-BA
091709-A
0.70
0.55
0.40
5
10
1
6
0.50 BSC
0.30
0.15
1.10 MAX
3.10
3.00
2.90
COPLANARITY
0.10
0.23
0.13
3.10
3.00
2.90
5.15
4.90
4.65
PIN 1
IDENTIFIER
15° MAX
0.95
0.85
0.75
0.15
0.05
Figure 32. 10-Lead Mini Small Outline Package [MSOP]
(RM-10)
Dimensions shown in millimeters
Data Sheet ADM1490E/ADM1491E
Rev. D | Page 15 of 16
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
COMPLIANT TO JEDEC STANDARDS MS-012-AA
012407-A
0.25 (0.0098)
0.17 (0.0067)
1.27 (0.0500)
0.40 (0.0157)
0.50 (0.0196)
0.25 (0.0099)
45°
1.75 (0.0688)
1.35 (0.0532)
SEATING
PLANE
0.25 (0.0098)
0.10 (0.0040)
4
1
85
5.00 (0.1968)
4.80 (0.1890)
4.00 (0.1574)
3.80 (0.1497)
1.27 (0.0500)
BSC
6.20 (0.2441)
5.80 (0.2284)
0.51 (0.0201)
0.31 (0.0122)
COPLANARITY
0.10
Figure 33. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body
(R-8)
Dimensions shown in millimeters and (inches)
COMPLIANT TO JEDEC STANDARDS MO-187-AA
0.80
0.55
0.40
4
8
1
5
0.65 BSC
0.40
0.25
1.10 MAX
3.20
3.00
2.80
COPLANARITY
0.10
0.23
0.09
3.20
3.00
2.80
5.15
4.90
4.65
PIN 1
IDENTIFIER
15° MAX
0.95
0.85
0.75
0.15
0.05
10-07-2009-B
Figure 34. 8-Lead Mini Small Outline Package [MSOP]
(RM-8)
Dimensions shown in millimeters
ORDERING GUIDE
Model
1
Temperature
Range Package Description
Package
Option Branding
ADM1490EBRZ −40°C to +85°C 8-Lead Standard Small Outline Package, Narrow Body [SOIC_N] R-8
ADM1490EBRZ-REEL7 −40°C to +85°C 8-Lead Standard Small Outline Package, Narrow Body [SOIC_N] R-8
ADM1490EBRMZ −40°C to +85°C 8-Lead Mini Small Outline Package [MSOP] RM-8 F0E
ADM1490EBRMZ-REEL7 −40°C to +85°C 8-Lead Mini Small Outline Package [MSOP] RM-8 F0E
ADM1491EBRZ −40°C to +85°C 14-Lead Standard Small Outline Package, Narrow Body [SOIC_N] R-14
ADM1491EBRZ-REEL7 −40°C to +85°C 14-Lead Standard Small Outline Package, Narrow Body [SOIC_N] R-14
ADM1491EBRMZ −40°C to +85°C 10-Lead Mini Small Outline Package [MSOP] RM-10 F0D
ADM1491EBRMZ-REEL7 −40°C to +85°C 10-Lead Mini Small Outline Package [MSOP] RM-10 F0D
1
Z = RoHS Compliant Part.

ADM1491EBRZ-REEL7

Mfr. #:
Manufacturer:
Analog Devices Inc.
Description:
RS-422/RS-485 Interface IC 5V 16Mbps ESD Protect Full-Duplex
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union