SP3490 Datasheet, PDF (3/11 Pages) Sipex Corporation – +3.3V Low Power Full Duplex RS-485 Transceivers with 10Mbps Data Rate

SPECIFICATIONS (continued)
T_AMB = T_MIN to T_MAX and V_CC = 3.3V ± 5% unless otherwise noted.
PARAMETERS
MIN. TYP.
SP3490 RECEIVER
AC Characteristics
Maximum Data Rate
10
Receiver Input to Output, t_PLH 40
70
Receiver Input to Output, t_PHL 40
70
Differential Receiver Skew
POWER REQUIREMENTS
Supply Voltage
Supply Current
+3.0
4
1000
800
MAX. UNITS CONDITIONS
Mbps
120
ns Figures 6 and 11
85
ns
T_AMB = 25^oC, V_CC = 3.3V, Figures 6 and 11
120
ns Figures 6 and 11
85
ns
T_AMB = 25^oC, V_CC = 3.3V, Figures 6 and 11
ns
t_PHL(A) - t_PLH(A) , t_PHL(B) - t_PLH(B) ,
Figures 6 and 11
+3.6
2000
1500
Volts
µA
DE = V_CC
DE = 0
D
VCC
R
VOD
R
VOC
Figure 1. Driver DC Test Load Circuit
CL
D
GENERATOR
(NOTE 1)
50Ω
VCC
RL =
60Ω
OUT
CL = 15pF (NOTE 2)
Figure 3. Driver Differential Output Delay and
Transition Time Circuit
VCC
S1
0V OR 3V
D
RL = 110Ω
OUT
GENERATOR
(NOTE 1)
CL = 50pF
(NOTE 2)
50Ω
Figure 5. Driver Enable and Disable Timing Circuit,
Output LOW
VDM
S1
D
GENERATOR
(NOTE 1)
50Ω
VCC
RL = 27Ω
OUT
CL = 15pF
(NOTE 2)
VOM =
VOH + VOL
2
1.5V
Figure 2. Driver Propagation Delay Test Circuit
GENERATOR
(NOTE 1)
S1
D
CL = 50pF
(NOTE 2)
50Ω
OUT
RL = 110Ω
VOM =
VOH + VOL
2
1.5V
Figure 4. Driver Enable and Disable Timing Circuit,
Output HIGH
GENERATOR
(NOTE 1)
50Ω
VID
R
OUT
CL = 15pF
(NOTE 2)
1.5V
0V
VOM = VCC
2
Figure 6. Receiver Propagation Delay Test Circuit
Rev. 10/11/02
SP3490/3491 Low Power Full-Duplex RS485 Transceivers
3
© Copyright 2002 Sipex Corporation