|
|
PDF MAX3087ESA Data sheet ( Hoja de datos )
| Número de pieza | MAX3087ESA | |
| Descripción | Fail-Safe / High-Speed 10Mbps / Slew-Rate-Limited RS-485/RS-422 Transceivers | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MAX3087ESA (archivo pdf) en la parte inferior de esta página. Total 21 Páginas | ||
|
No Preview Available !
19-1800; Rev 0; 9/00
±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
General Description
The MAX3080E–MAX3089E are ±15kV electrostatic dis-
charge (ESD)-protected, high-speed transceivers for RS-
485/RS-422 communication that contain one driver and
one receiver. These devices feature fail-safe circuitry,
which guarantees a logic-high receiver output when the
receiver inputs are open or shorted. This means that the
receiver output will be a logic high if all transmitters on a
terminated bus are disabled (high impedance). The
MAX3080E/MAX3081E/MAX3082E feature reduced
slew-rate drivers that minimize EMI and reduce reflec-
tions caused by improperly terminated cables, allowing
error-free data transmission up to 115kbps. The
MAX3083E/MAX3084E/MAX3085E offer higher driver
output slew-rate limits, allowing transmit speeds up to
500kbps. The MAX3086E/MAX3087E/ MAX3088Es’ dri-
ver slew rates are not limited, making transmit speeds
up to 10Mbps possible. The MAX3089E’s slew rate is
selectable between 115kbps, 500kbps, and 10Mbps by
driving a selector pin with a single three-state driver. All
devices feature enhanced ESD protection. All transmitter
outputs and receiver inputs are protected to ±15kV
using the Human Body Model.
These transceivers typically draw 375µA of supply
current when unloaded, or when fully loaded with the dri-
vers disabled.
All devices have a 1/8-unit-load receiver input impedance
that allows up to 256 transceivers on the bus. The
MAX3082E/MAX3085E/MAX3088E are intended for half-
duplex communications, while the MAX3080E/MAX3081E/
MAX3083E/MAX3084E/MAX3086E/MAX3087E are
intended for full-duplex communications. The MAX3089E
is selectable between half-duplex and full-duplex opera-
tion. It also features independently programmable
receiver and transmitter output phase via separate pins.
Features
o ESD Protection for RS-485 I/O Pins
±15kV, Human Body Model
o True Fail-Safe Receiver While Maintaining
EIA/TIA-485 Compatibility
o Enhanced Slew-Rate Limiting Facilitates
Error-Free Data Transmission
(MAX3080E–MAX3085E/MAX3089E)
o 1nA Low-Current Shutdown Mode (Except
MAX3081E/MAX3084E/MAX3087E)
o Pin-Selectable Full/Half-Duplex Operation
(MAX3089E)
o Phase Controls to Correct for Twisted-Pair
Reversal (MAX3089E)
o Allow Up to 256 Transceivers on the Bus
Applications
RS-422/RS-485 Communications
Level Translators
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
Ordering Information
PART
MAX3080ECSD
MAX3080ECPD
MAX3080EESD
MAX3080EEPD
TEMP. RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
14 SO
14 Plastic DIP
14 SO
14 Plastic DIP
Ordering Information continued at end of data sheet.
Selector Guide
Part
Half/Full
Duplex
Data
Rate
(Mbps)
Slew-
Rate
Limited
Low- Receiver/ Quiescent Transceivers
Power
Driver Current
On
Shutdown Enable (µA) Bus (µA)
MAX3080E
Full
0.115
Yes
Yes Yes 375
256
MAX3081E
Full
0.115
Yes
No
No 375
256
MAX3082E
Half
0.115
Yes
Yes Yes 375
256
MAX3083E
Full
0.5
Yes Yes Yes 375
256
MAX3084E
Full
0.5
Yes
No
No 375
256
MAX3085E
Half
0.5
Yes Yes Yes 375
256
MAX3086E
Full
10
No Yes Yes 375 256
MAX3087E
MAX3088E
Full
Half
10
10
No No No 375 256
No Yes Yes 375 256
MAX3089E Selectable Selectable Selectable
Yes
Yes
375
256
*Pin compatible with 75180, with additional features implemented using pins 1, 6, 8, and 13.
Pin
Count
14
8
8
14
8
8
14
8
8
14
Industry-
Standard
Pinout
75180
75179
75176
75180
75179
75176
75180
75179
75176
75180*
________________________________________________________________ Maxim Integrated Products 1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1 page  
±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
SWITCHING CHARACTERISTICS—MAX3083E/MAX3084E/MAX3085E, and MAX3089E with
SRL = VCC
(VCC = +5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.)
PARAMETER
Driver Input-to-Output
Driver Output Skew
| tDPLH - tDPHL |
SYMBOL
tDPLH
tDPHL
tDSKEW
Driver Rise or Fall Time
tDR, tDF
Maximum Data Rate
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
Receiver Input to Output
| tRPLH - tRPHL | Differential
Receiver Skew
Receiver Enable to Output Low
Receiver Enable to Output High
Receiver Disable Time from Low
Receiver Disable Time from
High
fMAX
tDZH
tDZL
tDLZ
tDHZ
tRPLH,
tRPHL
tRSKD
tRZL
tRZH
tRLZ
tRHZ
CONDITIONS
Figures 7 and 9, RDIFF = 54Ω,
CL1 = CL2 = 100pF
Figures 7 and 9, RDIFF = 54Ω,
CL1 = CL2 = 100pF
Figures 7 and 9, RDIFF = 54Ω,
CL1 = CL2 = 100pF
Figures 8 and 10, CL = 100pF, S2 closed
Figures 8 and 10, CL = 100pF, S1 closed
Figures 8 and 10, CL = 15pF, S1 closed
Figures 8 and 10, CL = 15pF, S2 closed
Figures 11 and 13; | VID | ≥ 2.0V;
rise and fall time of VID ≤ 15ns
Figures 11 and 13; | VID | ≥ 2.0V;
rise and fall time of VID ≤ 15ns
Figures 6 and 12, CL = 100pF, S1 closed
Figures 6 and 12, CL = 100pF, S2 closed
Figures 6 and 12, CL = 100pF, S1 closed
Figures 6 and 12, CL = 100pF, S2 closed
MIN TYP MAX UNITS
250 720 1000
ns
250 720 1000
-3 ±100 ns
200 530 750
ns
500 kbps
2500 ns
2500 ns
100 ns
100 ns
127 200
ns
3 ±30 ns
20 50 ns
20 50 ns
20 50 ns
20 50 ns
Time to Shutdown
Driver Enable from
Shutdown-to-Output High
tSHDN
(Note 5)
tDZH(SHDN) Figures 8 and 10, CL = 15pF, S2 closed
50 200 600 ns
4500 ns
Driver Enable from
Shutdown-to-Output Low
tDZL(SHDN) Figures 8 and 10, CL = 15pF, S1 closed
4500 ns
Receiver Enable from
Shutdown-to-Output High
Receiver Enable from
Shutdown-to-Output Low
tRZH(SHDN) Figures 6 and 12, CL = 100pF, S2 closed
tRZL(SHDN) Figures 6 and 12, CL = 100pF, S1 closed
3500
3500
ns
ns
_______________________________________________________________________________________ 5
5 Page 
±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
PIN
MAX3080E MAX3081E MAX3082E
MAX3083E MAX3084E MAX3085E
MAX3086E MAX3087E MAX3088E
MAX3089E
FULL-DUPLEX
DEVICES
12 8
HALF-
DUPLEX
DEVICES
—
FULL-
DUPLEX
MODE
12
HALF-
DUPLEX
MODE
—
— — — — 12
——
6 ——
—
14
1, 8, 13
—
1
—
— 13 13
8 14 14
— ——
Pin Description (continued)
NAME
FUNCTION
A
A
A
RXP
VCC
N.C.
Noninverting Receiver Input
Receiver Input Resistors*
Noninverting Receiver Input and Noninverting Driver
Output
Receiver Phase. Connect RXP to GND, or leave uncon-
nected for normal transmitter phase/polarity. Connect to
VCC to invert the receiver phase/polarity:
Positive Supply 4.75V ≤ VCC ≤ 5.25V
Not Connected. Not internally connected.
*(MAX3089E only) In half-duplex mode, the driver outputs serve as receiver inputs. The full-duplex receiver inputs (A and B) will still
have a 1/8-unit load, but are not connected to the receiver.
Function Tables
MAX3080E/MAX3083E/MAX3086E
TRANSMITTING
INPUTS
RE DE DI
OUTPUTS
ZY
X1101
X1010
0 0 X High-Z High-Z
10X
Shutdown
RECEIVING
INPUTS
OUTPUT
RE DE A-B RO
0 X ≥ -0.05V 1
0 X ≤ -0.2V 0
0 X Open/shorted 1
1 1 X High-Z
1 0 X Shutdown
MAX3081E/MAX3084E/MAX3087E
TRANSMITTING
INPUT
OUTPUTS
DI Z
10
01
Y
1
0
INPUTS
A-B
≥ -0.05V
≤ -0.2V
Open/shorted
RECEIVING
OUTPUT
RO
1
0
1
X = Don’t care
Shutdown mode, driver and receiver outputs high impedance
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet MAX3087ESA.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MAX3087ESA | Fail-Safe / High-Speed 10Mbps / Slew-Rate-Limited RS-485/RS-422 Transceivers | Maxim Integrated |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |