ADM488/ADM489
Rev. D | Page 4 of 16
TIMING SPECIFICATIONS
V
CC
= 5 V ± 10%. All specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 2.
Parameter Min Typ Max Unit Test Conditions/Comments
DRIVER
Propagation Delay Input to Output, T
PLH
, T
PHL
250 2000 ns
R
L
Differential = 54 Ω, C
L1
= C
L2
= 100 pF,
see
Figure 10
Driver O/P to OP, T
SKEW
100 800 ns
R
L
Differential = 54 Ω, C
L1
= C
L2
= 100 pF,
see
Figure 10
Driver Rise/Fall Time, T
R
, T
F
250 2000 ns
R
L
Differential = 54 Ω, C
L1
= C
L2
= 100 pF,
see
Figure 10
Driver Enable to Output Valid 250 2000 ns R
L
= 500 Ω, C
L
= 100 pF, see Figure 7
Driver Disable Timing 300 3000 ns R
L
= 500 Ω, C
L
= 15 pF, see Figure 7
Data Rate 250 kbps
RECEIVER
Propagation Delay Input to Output, T
PLH
, T
PHL
250 2000 ns C
L
= 15 pF, see Figure 10
Skew |T
PLH
T
PHL
| 100 ns
Receiver Enable, T
EN1
10 50 ns R
L
= 1 kΩ, C
L
= 15 pF, see Figure 9
Receiver Disable, T
EN2
10 50 ns R
L
= 1 kΩ, C
L
= 15 pF, see Figure 9
Data Rate 250 kbps
ADM488/ADM489
Rev. D | Page 5 of 16
ABSOLUTE MAXIMUM RATINGS
T
A
= 25°C, unless otherwise noted.
Table 3.
Parameter Rating
V
CC
7 V
Inputs
Driver Input (DI) −0.3 V to V
CC
+ 0.3 V
Control Inputs (DE, RE)
−0.3 V to V
CC
+ 0.3 V
Receiver Inputs (A, B) −14 V to +14 V
Outputs
Driver Outputs −14 V to +12.5 V
Receiver Output −0.5 V to V
CC
+ 0.5 V
Power Dissipation 8-Lead PDIP 700 mW
θ
JA
, Thermal Impedance 120°C/W
Power Dissipation 8-Lead SOIC 520 mW
θ
JA
, Thermal Impedance 110°C/W
Power Dissipation 14-Lead PDIP 800 mW
θ
JA
, Thermal Impedance 140°C/W
Power Dissipation 14-Lead SOIC 800 mW
θ
JA
, Thermal Impedance 120°C/W
Power Dissipation 16-Lead TSSOP 800 mW
θ
JA
, Thermal Impedance 150°C/W
Operating Temperature Range
Industrial (A Version) −40°C to +85°C
Storage Temperature Range −65°C to +150°C
Lead Temperature (Soldering, 10 sec) 300°C
Vapor Phase (60 sec) 215°C
Infrared (15 sec) 220°C
ESD Association S5.1 HBM Standard 3 kV
EFT Rating, IEC1000-4-4 2 kV
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
ADM488/ADM489
Rev. D | Page 6 of 16
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
V
CC
1
RO
2
DI
3
GND
4
A
8
B
7
Z
6
Y
5
ADM488
TOP VIEW
(Not to Scale)
00079-003
Figure 3. ADM488 8-Lead PDIP/SOIC Pin Configuration
Table 4. ADM488 Pin Function Descriptions
Pin No. Mnemonic Description
1 V
CC
Power Supply, 5 V ± 10%.
2 RO Receiver Output. When A > B by 200 mV, RO = high. If A < B by 200 mV, RO = low.
3 DI Driver Input. A logic low on DI forces Y low and Z high, while a logic high on DI forces Y high and Z low.
4 GND Ground Connection, 0 V.
5 Y Noninverting Driver, Output Y.
6 Z Inverting Driver, Output Z.
7 B Inverting Receiver, Input B.
8 A Noninverting Receiver, Input A.
NC
1
RO
2
RE
3
DE
4
V
CC
14
NC
13
A
12
B
11
DI
5
GND
6
GND
7
Z
10
Y
9
NC
8
NC = NO CONNECT
ADM489
TOP VIEW
(Not to Scale)
00079-004
Figure 4. ADM489 14-Lead PDIP/SOIC Pin Configuration
1
2
3
4
5
6
7
8
NC = NO CONNECT
16
15
14
13
12
11
10
9
NC
RO
RE
GND
DI
DE
V
CC
A
B
NC
NC
GND NC
Y
Z
NC
ADM489
TOP VIEW
(Not to Scale)
00079-005
Figure 5. ADM489 16-Lead TSSOP Pin Configuration
Table 5. ADM489 Pin Function Descriptions
PDIP/SOIC
Pin No.
TSSOP
Pin No.
Mnemonic
Description
1, 8, 13
2, 9, 10, 13,
16
NC No Connect. No connections are required to this pin.
2 3 RO
Receiver Output. When enabled, if A > B by 200 mV then RO = high. If A < B by 200 mV then
RO = low.
3 4
RE Receiver Output Enable. A low level enables the receiver output, RO. A high level places it in a
high impedance state.
4 5 DE
Driver Output Enable. A high level enables the driver differential outputs, Y and Z. A low level
places it in a high impedance state.
5 6 DI
Driver Input. When the driver is enabled, a logic low on DI forces Y low and Z high, while a logic
high on DI forces Y high and Z low.
6, 7 7, 8 GND Ground Connection, 0 V.
9 11 Y Noninverting Driver, Output Y.
10 12 Z Inverting Driver, Output Z.
11 14 B Inverting Receiver, Input B.
12 15 A Noninverting Receiver, Input A.
14 1 V
CC
Power Supply, 5 V ± 10%.

ADM489ARUZ-REEL7

Mfr. #:
Manufacturer:
Analog Devices Inc.
Description:
RS-422/RS-485 Interface IC Full Duplex,RS-485 Transceiver I.C.
Lifecycle:
New from this manufacturer.
Delivery:
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