TIGER ELECTRONIC CO.,LTD
Low-Power, Slew-Rate-Limited RS-485/RS-422
Transceivers
SN75176BP DIP8
Description
The SN75176 is low-power transceivers for RS-485
and RS- 422 communication. IC contains one driver and
one receiver.
The driver slew rates of the SN75176 is not limited,
allowing them to transmit up to 10 Mbps.
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 SN75176 is designed for half-duplex applications.
SN75176BDR SOP8
Features
Low Quiescent Current: 300µA
-7V to +12V Common-Mode Input Voltage Range
Three-State Outputs
50ns 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: 10 Mbps
Current-Limiting and Thermal Shutdown for Driver Overload Protection
Enhanced ESD Specifications:
±15kV IEC61000-4-2 Air Discharge
±8kV IEC61000-4-2 Contact Discharge
Pin Description
75176
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
CC
) 12V
Control Input Voltage -0.5V to (V
CC
+ 0.5V)
Driver Input Voltage (DI) -0.5V to (V
CC
+ 0.5V)
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 (V
CC
+0.5V)
Continuous Power Dissipation (T
A
= +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C)
727mW
8-Pin SOP (derate 5.88mW/°C above +70°C)
471mW
Operating Temperature Ranges 0°C to +70°C
Storage Temperature Range -65°C to +150°C
Lead Temperature (soldering, 10sec) +260°C
* Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device.
These are stress ratings only and functional operation of the device at these or any other conditions beyond those
indicated under “recommended operating conditions” is not implied.
Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Notes 1, 2)
PARAMETER
Differential Driver Output
(no load)
Differential Driver Output
(with load)
Change in Magnitude of Driver
Differential Output Voltage for
Complementary Output States
Driver Common-Mode Output
Voltage
Change in Magnitude of Driver
Common-Mode Output Voltage
for Complementary Output
States
Input High Voltage
Input Low Voltage
Input Current
Input Current
(A, B)
Receiver Differential Threshold
Voltage
Receiver Input Hysteresis
Receiver Output High Voltage
Receiver Output Low Voltage
SYMBOL
V
OD1
V
OD2
R = 50Ω (RS-422)
R = 27Ω (RS-485), Figure 1
∆V
OD
R = 27Ω or 50Ω, Figure 1
2
1.5
5
0.2
V
CONDITIONS
MIN
TY
P
MAX
5
UNIT
S
V
V
V
OC
∆V
OD
R = 27Ω or 50Ω, Figure 1
R = 27Ω or 50Ω, Figure 1
3
0.2
V
V
V
IH
V
IL
I
IN1
I
IN2
DE, DI, RE
DE, DI, RE
DE, DI, RE
DE = 0V;
V
CC
= 0V or 5.25V
V
IN
= 12V
V
IN
= -7V
2.0
0.8
±2
1.0
-0.8
-0.2
70
3.5
0.4
0.2
V
V
µA
mA
V
TH
∆V
TH
V
OH
V
OL
-7V
≤
V
CM
≤12V
V
CM
= 0V
I
O
= -4mA, VID = 200mV
I
O
= 4mA, VID = -200mV
V
mV
V
V
75176
DC ELECTRICAL CHARACTERISTICS
(continue)
(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2)
PARAMETER
Three-State (high impedance)
Output Current at Receiver
Receiver Input Resistance
No-Load Supply Current
(Note 3)
SYMBOL
IOZR
RIN
I
CC
CONDITIONS
0.4V
≤
VO
≤
2.4V
-7V
≤
VCM
≤
12V
DE = V
CC
RE = 0V or V
CC
DE = 0V
Driver Short-Circuit Current
VO = High
Driver Short-Circuit Current
VO = Low
Receiver Short-Circuit Current
ESD Protection
I
OSR
0V
≤
V
O
≤
V
CC
A, B, Y and Z pins, tested using
Human Body Model
7
±15
95
mA
kV
I
OSD1
I
OSD2
-7V
≤
V
O
≤
12V (Note 4)
-7V
≤
V
O
≤12V
(Note 4)
35
35
250
250
mA
mA
12
500
300
900
500
µA
MIN
TYP
MAX UNITS
±1
µA
kΩ
SWITCHING CHARACTERISTICS
(V
CC
= 5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Notes 1, 2)
PARAMETER
Driver Input to Output
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
Receiver Input to Output
| t
PLH
- t
PHL
| Differential
Receiver Skew
Receiver Enable to Output
Low
Receiver Enable to Output
High
Receiver Disable Time from
Low
Receiver Disable Time from
High
Maximum Data Rate
SYMBOL
t
PLH
t
PHL
t
SKEW
t
ZH
t
ZL
t
LZ
t
HZ
t
PLH
t
PHL
t
SKD
t
ZL
t
ZH
t
LZ
t
HZ
f
MAX
CONDITIONS
R
DIFF
= 54Ω
C
L1
= C
L2
= 100pF
R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF
C
L
= 100pF, S2 closed
C
L
= 100pF, S1 closed
C
L
= 15pF, S1 closed
C
L
= 15pF, S2 closed
R
DIFF
= 54Ω
C
L1
= C
L2
= 100pF
R
DIFF
= 54Ω
C
L1
= C
L2
= 100pF
C
RL
= 15pF, S1 closed
C
RL
= 15pF, S2 closed
C
RL
= 15pF, S1 closed
C
RL
= 15pF, S2 closed
2.5
20
20
MIN
10
10
TYP
55
55
5
40
40
40
40
60
60
5
30
30
30
30
10
MAX UNITS
60
60
10
70
70
70
70
100
100
10
50
50
50
50
20
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Mbps
Note 1: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced
to device ground unless otherwise specified.
Note 2: All typical specifications are given for V
CC
=5V and T
A
=+25°C.
Note 3: Supply current specification is valid for loaded transmitters when DE=0V.
Note 4: Applies to peak current.
75176
TEST CIRCUITS
Figure 1. Driver V
OD
and V
OC
Figure 2. Driver V
OD
with Varying Common-Mode
Voltage
Figure 3. Receiver V
OH
and V
OL
Figure 4. Driver Differential Output Delay and Transition Times
75176
TEST CIRCUITS
Figure 5. Driver Propagation Times
Figure 6. Driver Enable and Disable Times (t
PZH
, t
PSH
, t
PHZ
)
Figure 7. Driver Enable and Disable Times (t
PZL
, t
PSL
, t
PLZ
)
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