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부품번호 | MAX3077E 기능 |
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기능 | RS-485/RS-422 Transceivers | ||
제조업체 | Maxim Integrated | ||
로고 | |||
전체 23 페이지수
MAX3070E–MAX3079E
+3.3V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
General Description
The MAX3070E–MAX3079E 3.3V, ±15kV ESD-protected,
RS-485/RS-422 transceivers feature one driver and one
receiver. These devices include fail-safe circuitry, guaranteeing
a logic-high receiver output when receiver inputs are open
or shorted. The receiver outputs a logic-high if all transmitters
on a terminated bus are disabled (high impedance). The
devices include a hot-swap capability to eliminate false
transitions on the bus during power-up or hot insertion.
The MAX3070E/MAX3071E/MAX3072E feature reduced
slew-rate drivers that minimize EMI and reduce reflections
caused by improperly terminated cables, allowing error-
free data transmission up to 250kbps. The MAX3073E/
MAX3074E/MAX3075E also feature slew-rate-limited
drivers but allow transmit speeds up to 500kbps. The
MAX3076E/MAX3077E/MAX3078E driver slew rates are
not limited, making transmit speeds up to 16Mbps possible.
The MAX3079E slew rate is pin-selectable for 250kbps,
500kbps, and 16Mbps.
The MAX3072E/MAX3075E/MAX3078E are intended
for half-duplex communications, and the MAX3070E/
MAX3071E/MAX3073E/MAX3074E/MAX3076E/
MAX3077E are intended for full-duplex communications.
The MAX3079E is selectable for half-duplex or full-duplex
operation. It also features independently programmable
receiver and transmitter output phase through separate
pins.
The MAX3070E–MAX3079E transceivers draw 800μA
of supply current when unloaded, or when fully loaded
with the drivers disabled. All devices have a 1/8-unit load
receiver input impedance, allowing up to 256 transceivers
on the bus.
Applications
●● Lighting Systems
●● Industrial Control
●● Telecom
●● Security Systems
●● Instrumentation
Benefits and Features
●● Protection for Robust Performance
• ±15kV Human Body Model ESD on I/O Pins
• True Fail-Safe Receiver While Maintaining
EIA/TIA-485 Compatibility
• Enhanced Slew-Rate-Limiting Facilitates Error-
Free Data Transmission (MAX3070E-MAX3075E/
MAX3079E)
• Hot-Swap Input Structure on DE and RE
●● Flexible Feature Set for Ease of Design
• Pin-Selectable Full/Half-Duplex Operation
(MAX3079E)
• Phase Controls to Correct for Twisted-Pair
Reversal (MAX3079E)
• Allows up to 256 Transceivers on the Bus
• Available in Industry-Standard SO and DIP packages
●● 10µA Shutdown Current Mode for Power Savings
(Except MAX3071E/MAX3074E/MAX3077E)
Ordering Information at end of data sheet.
Selector Guide, Pin Configurations, and Typical Operating
Circuits appear at end of data sheet.
19-2668; Rev 4; 1/16
MAX3070E–MAX3079E
+3.3V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
Switching Characteristics
Driver Switching Characteristics
MAX3070E/MAX3071E/MAX3072E/MAX3079E with SRL = UNCONNECTED (250kbps)
(VCC = 3.3V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 3.3V and TA = +25°C.)
PARAMETER
Driver Propagation Delay
Driver Differential Output Rise or
Fall Time
SYMBOL
tDPLH
tDPHL
CONDITIONS
CL= 50pF, RL= 54Ω, Figures 2 and 3
tDR , tDF CL= 50pF, RL= 54Ω, Figures 2 and 3
MIN TYP MAX UNITS
250
250
1500
1500
ns
350
1600
ns
Differential Driver Output Skew
|tDPLH - tDPHL|
Maximum Data Rate
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
Driver Enable from Shutdown to
Output High
tDSKEW CL= 50pF, RL= 54Ω, Figures 2 and 3
tDZH
tDZL
tDLZ
tDHZ
Figure 4
Figure 5
Figure 5
Figure 4
tDZH(SHDN) Figure 4
250
200
2500
2500
100
100
5500
ns
kbps
ns
ns
ns
ns
ns
Driver Enable from Shutdown to
Output Low
Time to Shutdown
tDZL(SHDN) Figure 5
tSHDN
5500
ns
50 200 600
ns
Receiver Switching Characteristics
MAX3070E/MAX3071E/MAX3072E/MAX3079E with SRL = UNCONNECTED (250kbps)
(VCC = 3.3V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 3.3V and TA = +25°C.)
PARAMETER
Receiver Propagation Delay
Receiver Output Skew
|tRPLH - tRPHL|
Maximum Data Rate
Receiver Enable to Output Low
Receiver Enable to Output High
Receiver Disable Time from Low
Receiver Disable Time from High
Receiver Enable from Shutdown
to Output High
SYMBOL
tRPLH
tRPHL
CONDITIONS
CL = 15pF, Figures 6 and 7
tRSKEW CL = 15pF, Figures 6 and 7
tRZL
tRZH
tRLZ
tRHZ
Figure 8
Figure 8
Figure 8
Figure 8
tRZH(SHDN) Figure 8
MIN TYP MAX UNITS
200 ns
200
30 ns
250 kbps
50 ns
50 ns
50 ns
50 ns
4000
ns
Receiver Enable from Shutdown
to Output Low
Time to Shutdown
tRZL(SHDN) Figure 8
tSHDN
4000
ns
50 200 600 ns
www.maximintegrated.com
Maxim Integrated │ 4
4페이지 MAX3070E–MAX3079E
+3.3V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
Typical Operating Characteristics
(VCC = 3.3V, TA = +25°C, unless otherwise noted. Note: The MAX3077EMSA/PR meets specification over temperature.)
SUPPLY CURRENT vs. TEMPERATURE
1.0
0.9
0.8 DE = VCC
DE = 0
0.7
0.6
0.5
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
RECEIVER OUTPUT HIGH VOLTAGE
vs. TEMPERATURE
3.30
IO = -1mA
3.25
3.20
3.15
3.10
3.05
3.00
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
DRIVER DIFFERENTIAL OUTPUT VOLTAGE
vs. TEMPERATURE
2.60
2.50 RL = 54Ω
2.40
2.30
2.20
2.10
2.00
1.90
1.80
1.70
1.60
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
OUTPUT CURRENT
vs. RECEIVER OUTPUT HIGH VOLTAGE
30
25
20
15
10
5
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
OUTPUT HIGH VOLTAGE (V)
RECEIVER OUTPUT LOW VOLTAGE
vs. TEMPERATURE
0.8
IO = -1mA
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
OUTPUT CURRENT
vs. TRANSMITTER OUTPUT HIGH VOLTAGE
160
140
120
100
80
60
40
20
0
-7 -6 -5 -4 -3 -2 -1 0 1 2 3 4
OUTPUT HIGH VOLTAGE (V)
OUTPUT CURRENT
vs. RECEIVER OUTPUT LOW VOLTAGE
35
30
25
20
15
10
5
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
OUTPUT HIGH VOLTAGE (V)
DRIVER OUTPUT CURRENT
vs. DIFFERENTIAL OUTPUT VOLTAGE
100
90
80
70
60
50
40
30
20
10
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
DIFFERENTIAL OUTPUT VOLTAGE (V)
OUTPUT CURRENT
vs. TRANSMITTER OUTPUT LOW VOLTAGE
180
160
140
120
100
80
60
40
20
0
0 2 4 6 8 10 12
OUTPUT LOW VOLTAGE (V)
www.maximintegrated.com
Maxim Integrated │ 7
7페이지 | |||
구 성 | 총 23 페이지수 | ||
다운로드 | [ MAX3077E.PDF 데이터시트 ] |
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부품번호 | 상세설명 및 기능 | 제조사 |
MAX3077E | RS-485/RS-422 Transceivers | Maxim Integrated |
MAX3077EAPA | +3.3V / 15kV ESD-Protected / Fail-Safe / Hot-Swap / RS-485/RS-422 Transceivers | Maxim Integrated |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |