KKX485N [KODENSHI]
Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers; 低功耗，限摆率限制RS - 485 / RS -422收发器
| 型号： | KKX485N |
| 厂家： | 
KODENSHI KOREA CORP. |
| 描述： | Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers |
| 文件： | 总6页 (文件大小：378K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TECHNICAL DATA
Low-Power, Slew-Rate-Limited RS-485/RS-422
Transceivers
KKX485
General Description
The KKX485 is low-power transceivers for RS-485 and RS-
422 communication. IC contains one driver and one receiver.
The driver slew rates of the KKX485 is not limited, allowing
them to transmit up to 2.5Mbps.
These transceivers draw between 120µA and 500µA of
supply current when unloaded or fully loaded with disabled
drivers. All parts operate from a single 5V supply. Drivers are
short-circuit current limited and are protected against
excessive power dissipation by thermal shutdown circuitry
that places the driver outputs into a high-impedance state.
The receiver input has a fail-safe feature that guarantees a
logic-high output if the input is open circuit. The KKX485 is
designed for half-duplex applications.
ORDERING INFORMATION
KKX485N Plastic
KKX485D SOIC
Features
Low Quiescent Current: 300µA
-7V to +12V Common-Mode Input Voltage Range
Three-State Outputs
30ns Propagation Delays, 5ns Skew
Full-Duplex and Half-Duplex Versions Available
Operate from a Single 5V Supply
Allows up to 32 Transceivers on the Bus
Data rate: 2,5 Mbps
Current-Limiting and Thermal Shutdown for Driver Overload Protection
1
KKX485
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC) 12V
Continuous Power Dissipation (TA= +70°C)
Control Input Voltage -0.5V to (VCC + 0.5V)
8-Pin Plastic DIP (derate 9.09mW/°C above
+70°C) 727mW
Driver Input Voltage (DI) -0.5V to (VCC+ 0.5V)
8-Pin SOP (derate 5.88mW/°C above +70°C)
471mW
Driver Output Voltage (A, B) -8V to +12.5V
Receiver Input Voltage (A, B) -8V to +12.5V
Receiver Output Voltage (RO) -0.5V to (VCC+0.5V)
Operating Temperature Ranges 0°C to +70°C
Storage Temperature Range -65°C to +160°C
Lead Temperature (soldering, 10sec) +300°C
DC ELECTRICAL CHARACTERISTICS
(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2)
TY
P
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX UNITS
Differential Driver Output (no
load)
VOD1
5
V
V
Differential Driver Output
(with load)
VOD2
R = 50Ω (RS-422)
2
R = 27Ω (RS-485), Figure 4
R = 27Ω or 50Ω, Figure 4
1.5
5
Change in Magnitude of Driver
Differential Output Voltage for
Complementary Output States
∆VOD
0.2
V
Driver Common-Mode Output
Voltage
VOC
R = 27Ω or 50Ω, Figure 4
R = 27Ω or 50Ω, Figure 4
3
V
V
Change in Magnitude of Driver
Common-Mode Output Voltage for
Complementary Output States
∆VOD
0.2
Input High Voltage
Input Low Voltage
VIH
VIL
IIN1
IIN2
2.0
V
V
DE, DI, RE
DE, DI, RE
DE, DI, RE
0.8
±2
Input Current
Input Current
(A, B)
µA
mA
DE = 0V;
VIN = 12V
1.0
-0.8
0.2
VCC = 0V or 5.25V, VIN = -7V
-7V ≤ VCM ≤12V
Receiver Differential Threshold
Voltage
Receiver Input Hysteresis
VTH
-0.2
3.5
V
∆VTH
VOH
VOL
VCM = 0V
70
mV
V
Receiver Output High Voltage
Receiver Output Low Voltage
IO = -4mA, VID = 200mV
IO = 4mA, VID = -200mV
0.4V ≤ VO ≤ 2.4V
0.4
±1
V
Three-State (high impedance)
Output Current at Receiver
Receiver Input Resistance
IOZR
µA
RIN
-7V ≤ VCM ≤ 12V
kΩ
2
KKX485
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2)
TY
P
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX UNITS
No-Load Supply Current
(Note 3)
ICC
DE = VCC
500
300
900
500
µA
RE = 0V or VCC
DE = 0V
Driver Short-Circuit Current,
IOSD1
-7V ≤ VO ≤ 12V (Note 4)
35
250
mA
VO = High
Driver Short-Circuit Current,
IOSD2
IOSR
-7V ≤ VO ≤12V (Note 4)
0V ≤ VO ≤ VCC
35
7
250
95
mA
mA
VO = Low
Receiver Short-Circuit Current
SWITCHING CHARACTERISTICS
(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
10
TYP
MAX UNITS
Driver Input to Output
tPLH
tPHL
tSKEW
tZH
30
30
5
60
60
10
70
70
70
70
ns
RDIFF = 54Ω
CL1 = CL2 = 100pF
10
Driver Output Skew to Output
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
| tPLH - tPHL | Differential
ns
ns
ns
ns
ns
ns
RDIFF = 54Ω, CL1 = CL2 = 100pF
CL= 100pF, S2 closed
CL= 100pF, S1 closed
CL= 15pF, S1 closed
CL= 15pF, S2 closed
RDIFF = 54Ω
40
40
40
40
13
tZL
tLZ
tHZ
tSKD
Receiver Skew
CL1 = CL2 = 100pF
Receiver Enable to Output Low
Receiver Enable to Output High
Receiver Disable Time from
Low
tZL
tZH
tLZ
CRL = 15pF, S1 closed
CRL = 15pF, S2 closed
CRL = 15pF, S1 closed
20
20
20
50
50
50
ns
ns
ns
Receiver Disable Time from
High
tHZ
CRL = 15pF, S2 closed
20
50
ns
Maximum Data Rate
fMAX
2.5
Mbps
3
KKX485
4
KKX485
Operation timing diagrams of ILX 485
Table of ILX 485 operation
Inputs
Transmitting
Receiving
Inputs
Outputs X
Outputs
RE
X
X
0
DE
1
1
0
0
DI
1
0
X
X
Z
0
1
Z
Z
Y
1
0
Z
Z
RE
0
0
0
1
DE
0
0
0
0
A-B
+0.2V
-0.2V
open
X
RO
1
0
1
Z
1
X-don’t care
Z-high impedance
5
KKX485
N SUFFIX PLASTIC DIP
(MS – 001BA)
A
Dimension, mm
5
4
8
1
Symbol
MIN
8.51
6.1
MAX
10.16
7.11
B
A
B
C
D
F
5.33
F
L
0.36
1.14
0.56
C
1.78
SEATING
PLANE
-T-
K
2.54
7.62
G
H
J
N
M
J
G
H
D
0°
10°
3.81
8.26
0.36
0.25 (0.010) M
T
2.92
7.62
0.2
K
L
M
N
NOTES:
1. Dimensions “A”, “B” do not include mold flash or protrusions.
Maximum mold flash or protrusions 0.25 mm (0.010) per side.
0.38
D SUFFIX SOIC
(MS - 012AA)
Dimension, mm
A
8
5
Symbol
MIN
4.8
MAX
5
A
B
C
D
F
B
H
P
3.8
4
1.35
0.33
0.4
1.75
0.51
1.27
1
4
G
R x 45
C
-T-
SEATING
PLANE
1.27
5.72
G
H
J
K
M
D
J
F
M
0.25 (0.010) M T C
0°
8°
0.1
0.25
0.25
6.2
K
M
P
NOTES:
0.19
5.8
1. Dimensions A and B do not include mold flash or protrusion.
2. Maximum mold flash or protrusion 0.15 mm (0.006) per side
0.25
0.5
R
for A; for B 0.25 mm (0.010) per side.
‑
6
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