Operating Temperature Range ......................... -40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................ -65°C to +150°C
Lead Temperature (Soldering, 10s) ................................. +300°C
Soldering Temperature (Reflow)......................................+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 in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Package Thermal Characteristics
(Note 1)
Junction-to-Ambient Thermal Resistance (θ
JA
) ..............36°C/W
Junction-to-Case Thermal Resistance (θ
JC
) .....................3°C/W
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to
www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
PARAMETER
POWER SUPPLY
Supply Voltage
Supply Current
Logic Supply Voltage
Differential Threshold Voltage
Differential Input Hysteresis
Single-Ended Input Current
Low Differential Voltage Fault
Threshold
Single-Ended Input Fault
Threshold
Differential Threshold Voltage
Differential Input Hysteresis
Single-Ended Input Current
(V
CC
= 5V±10%, V
L
= 1.62V to V
CC
, T
A
= -40°C to +125°C unless otherwise noted. Typical values are at V
CC
= 5V, V
L
= 3.3V,
T
A
= +25°C.) (Notes 2, 3)
SYMBOL
V
CC
I
CC
V
L
V
TH
ΔV
TH
I
IN
V
TH_DFP
V
TH_DFN
V
TH_SELP
V
TH_SELN
V
TH
ΔV
TH
I
IN
-20V ≤ V
CM
≤ +20V
-20V ≤ V
CM
≤ +20V
V
CC
= 0V or 5V
V
IN
= +10V
V
IN
= -10V
-270
+270
-460
+15
-18
-900
1
+280
-270
-170
+460
Outputs not switching, no load
1.62
-200
230
+100
-170
+460
-270
+18
-15
+900
+160
CONDITIONS
MIN
4.5
9
TYP
MAX
5.5
14
5.5
+200
UNITS
V
mA
V
mV
mV
μA
mV
V
RS-422 RECEIVERS (RxA, RxB, RxZ, RxY)
-20V ≤ V
CM
≤ +20V, positive
-20V ≤ V
CM
≤ +20V, negative
Positive
Negative
0V ≤ V
CM
≤ +25V
0V ≤ V
CM
≤ +25V
V
TH
= +24V
V
TH
= -10V
DIFFERENTIAL HTL RECEIVERS (RxA, RxB, RxZ)
mV
V
μA
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Maxim Integrated
│
2
MAX14890E
Incremental Encoder Interface for RS-422,
HTL, and TTL with Digital Inputs
Electrical Characteristics (continued)
PARAMETER
Low Differential Voltage Fault
Threshold
SYMBOL
V
TH_DFP
V
TH_DFN
(V
CC
= 5V±10%, VL = 1.62V to V
CC
, T
A
= -40°C to +125°C unless otherwise noted. Typical values are at V
CC
= 5V, V
L
= 3.3V,
TA = +25°C.) (Notes 2, 3 )
CONDITIONS
0V ≤ V
CM
≤ +24V, Positive
0V ≤ V
CM
≤ +24V, Negative
MIN
+1.2
-2.0
-18
8
13
-40
-40
270
V
CC
= 0V or normally powered, V
IN
= 24V
V
CC
= 0V or normally powered, V
IN
= 24V
-18
TTL mode
TTL mode
TTL mode
TTL mode, V
CC
= 0V or 5V, V
IN
= 5V
TTL mode, V
CC
= 0V or 5V, V
IN
= 5V
Negative
Positive
DI mode, HITH is high or low
DI mode, HITH is high or low
DI mode, HITH is high or low
-18
+15
8
-40
1.2
2.0
-40
0.53
85
85
-15
+18
40
5.5
V
460
460
-15
40
0.8
TYP
MAX
+2.0
-1.2
-15
40
40
6
11
UNITS
V
V
Single-Ended Input Fault
V
TH_SEN
Negative
Threshold
SINGLE-ENDED HTL RECEIVERS (RxA, RxB, RxZ)
Input Logic High Voltage
Input Logic Low Voltage
Input Hysteresis
Input Current (A, B, Z)
Input Current (A,
B, Z)
Fault Threshold Voltage
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Current (A, B, Z, DIY, DI2,
DI3)
Input Current (A,
B, Z, Y)
Fault Threshold Voltage
V
IH_SE
V
IL_SE
ΔV
ITH_SE
I
_HTL
I
_HTL
V
TH_HTLF
V
IH_TTL
V
IL_TTL
V
HY_TTL
I
_TTL
I
_TTL
V
TH_TTLF
HITH is low
HITH is high
HITH is low
HITH is high
V
V
mV
μA
μA
V
V
V
V
μA
TTL RECEIVERS (RxA, RxB, RxZ, RxY, RxD2, RxD3)
DIGITAL INPUT RECEIVERS (DI2, DI3, RxY, RxZ)
Input High Voltage
Input Low Voltage
Input Hysteresis
V
IH_DI
V
IL_DI
V
HY_DI
V
V
V
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Maxim Integrated
│
3
MAX14890E
Incremental Encoder Interface for RS-422,
HTL, and TTL with Digital Inputs
Electrical Characteristics (continued)
PARAMETER
Current Sink
Fault Threshold Voltage
SYMBOL
I
DI
V
TH_DIF
(V
CC
= 5V±10%, V
L
= 1.62V to V
CC
, T
A
= -40°C to +125°C unless otherwise noted. Typical values are at V
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