MAX1480A_05 Datasheet, PDF (5/21 Pages) Maxim Integrated Products – Complete, Isolated RS-485/RS-422 Data Interface

Complete, Isolated RS-485/RS-422
Data Interface
SWITCHING CHARACTERISTICS—MAX1480B/MAX1480C/MAX1490B (continued)
(V_{CC_} = 5V ±10%, FS = V_{CC_}, T_A = T_MIN to T_MAX, unless otherwise noted. Typical values are at V_{CC_} = 5V and TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP MAX UNITS
Driver Disable Time from Low
(MAX1480C Only)
t_LZ
Figures 6 and 8, C_L = 15pF, S1 closed
2.0
4.5
µs
Driver Disable Time from High
(MAX1480C Only)
t_HZ
Figures 6 and 8, C_L = 15pF, S2 closed
2.0
4.5
µs
Receiver Input to Output
Propagation Delay
|t_PLH - t_PHL| Differential Receiver
Skew
Maximum Data Rate
Time to Shutdown
Shutdown to Driver Output High
Shutdown to Driver Output Low
t_PLH
t_PHL
t_SKD
f_MAX
t_SHDN
t_ZH(SHDN)
t_ZL(SHDN)
Figures 5 and 10, R_DIFF = 54Ω,
C_L1 = C_L2 = 100pF
Figures 5 and 10, R_DIFF = 54Ω,
C_L1 = C_L2 = 100pF
t_PLH, t_PHL < 50% of data period
Figures 6 and 9, C_L = 100pF, S2 closed
Figures 6 and 9, C_L = 100pF, S1 closed
2
3.0
µs
2
3.0
1200
ns
0.25
Mbps
100
µs
35
100
µs
35
100
µs
Note 1: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to logic-
side ground (GND_), unless otherwise specified.
Note 2: For DE´ and DI´ pin descriptions, see Detailed Block Diagram and Typical Application Circuit (Figure 1 for MAX1480A/
MAX1480B/MAX1480C, Figure 2 for MAX1490A/MAX1490B).
Note 3: Shutdown supply current is the current at V_CC1 and V_CC2 when shutdown is enabled.
Note 4: Applies to peak current (see Typical Operating Characteristics). Although the MAX1480A/B/C and MAX1490A/B provide
electrical isolation between logic ground and signal paths, they do not provide isolation between external shields and the
signal paths (see Isolated Common Connection section).
_______________________________________________________________________________________ 5