SPECIFICATIONS (continued)
TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.
PARAMETERS
MIN.
TYP.
MAX. UNITS CONDITIONS
SP481E/SP485E RECEIVER
DC Characteristics
Differential Input Threshold
Differential Input Threshold
(SP485EMN ONLY)
-0.2
-0.4
+0.2 Volts
+0.4 Volts
-7V ≤ VCM ≤ +12V
-7V ≤ VCM ≤ +12V
Input Hysteresis
Output Voltage High
Output Voltage Low
Three-State (High Impedance)
Output Current
20
15
mV
Volts
Volts
VCM = 0V
IO = -4mA, VID = +200mV
IO = +4mA, VID = -200mV
3.5
0.4
±1
µA
kΩ
+1.0 mA
0.4V ≤ VO ≤ 2.4V; RE = 5V
-7V ≤ VCM ≤ +12V
DE = 0V, VCC = 0V or 5.25V, VIN = 12V
DE = 0V, VCC = 0V or 5.25V, VIN = -7V
0V ≤ VO ≤ VCC
Input Resistance
12
7
Input Current (A, B); VIN = 12V
Input Current (A, B); VIN = -7V
Short-Circuit Current
-0.8
95
mA
mA
SP481E/SP485E RECEIVER
AC Characteristics
Maximum Data Rate
10
20
Mbps
ns
RE = 0V, DE = 0V
tPLH; RDIFF = 54Ω,
Receiver Input to Output
45
45
13
100
100
CL1 = CL2 = 100pF; Figures 3 & 7
tPHL; RDIFF = 54Ω,
Receiver Input to Output
20
ns
ns
CL1 = CL2 = 100pF; Figures 3 & 7
RDIFF = 54Ω; CL1 = CL2 = 100pF;
Figures 3 & 7
Diff. Receiver Skew ItPLH-tPHL
I
Receiver Enable to
Output Low
45
70
ns
CRL = 15pF; Figures 2 & 8; S1 closed
Receiver Enable to
Output High
Receiver Disable from Low
Receiver Disable from High
45
45
45
70
70
70
ns
ns
ns
CRL = 15pF; Figures 2 & 8; S2 closed
CRL = 15pF; Figures 2 & 8; S1 closed
CRL = 15pF; Figures 2 & 8; S2 closed
SP481E
Shutdown Timing
Time to Shutdown
Driver Enable from Shutdown
to Output High
Driver Enable from Shutdown
to Output Low
Receiver Enable from
Shutdown to Output High
Receiver Enable from
Shutdown to Output Low
50
200
40
600
100
100
ns
ns
ns
RE = 5V, DE = 0V
CL = 100pF; See Figures 4 & 6; S2 closed
CL = 100pF; See Figures 4 & 6; S1 closed
CL = 15pF; See Figures 2 & 8; S2 closed
CL = 15pF; See Figures 2 & 8; S1 closed
40
300
300
1000 ns
1000 ns
POWER REQUIREMENTS
Supply Voltage
Supply Current
SP481E/485E
+4.75
+5.25 Volts
No Load
900
600
µA
µA
RE, DI = 0V or VCC; DE = VCC
RE = 0V, DI = 0V or 5V; DE = 0V
SP481E
Shutdown Mode
10
µA
DE = 0V, RE=VCC
ENVIRONMENTAL AND MECHANICAL
Operating Temperature
Commercial (_C_)
Industrial (_E_)
(_M_)
Storage Temperature
Package
0
+70
+85
+125 °C
+150 °C
°C
°C
-40
-40
-65
Plastic DIP (_P)
NSOIC (_N)
Rev. 5/16/03
SP481E Low Power Half-Duplex RS485 Transceivers
© Copyright 2003 Sipex Corporation
3
SIPEX [ SIPEX CORPORATION ]
