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| UM488_15 Datasheet, PDF (5/17 Pages) Union Semiconductor, Inc. – Enhanced Slew-Rate Limiting Facilitates Error-Free Data Transmission | |||
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UM488/UM491
Switching Characteristics
(VCC = +5V ± 5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V
and TA = +25°C.)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Driver Input-to-Output
tDPLH
tDPHL
Figures 5 and 7, RDIFF = 54Ω, 10
CL1 = CL2 = 100pF
10
30
30
60
60
ns
Driver Output Skew
| tDPLH - tDPHL |
tDSKEW
Figures 5 and 7, RDIFF = 54Ω,
CL1 = CL2 = 100pF
5 10 ns
Driver Rise or Fall Time
tDR, tDF
Figures 5 and 7, RDIFF = 54Ω,
CL1 = CL2 = 100pF
5
15 25
ns
Maximum Data Rate
fMAX
2.5
Mbps
Driver Enable to Output
High
tDZH
Figures 6 and 8, CL = 100pF,
S2 closed
40 70 ns
Driver Enable to Output Low tDZL
Driver Disable Time from
Low
tDLZ
Driver Disable Time from
High
tDHZ
Figures 6 and 8, CL = 100pF,
S1 closed
Figures 6 and 8, CL = 15pF,
S1 closed
Figures 6 and 8, CL = 15pF,
S2 closed
40 70 ns
40 70 ns
40 70 ns
Receiver Input to Output
tRPLH,
tRPHL
Figures 9 and 11; | VID | â¥2.0V; 20
rise and fall time of VIDâ¤15ns
90 150
ns
| tRPLH - tRPHL | Differential
Receiver Skew
tRSKD
Figures 9 and 11; | VID | â¥2.0V;
rise and fall time of VIDâ¤15ns
13
ns
Receiver Enable to Output
Low
tRZL
Figures 4 and 10, CL = 100pF,
S1 closed
20 50 ns
Receiver Enable to Output
High
tRZH
Figures 4 and 10, CL = 100pF,
S2 closed
Receiver Disable Time from
Low
tRLZ
Figures 4 and 10, CL = 100pF,
S1 closed
Receiver Disable Time from
High
tRHZ
Figures 4 and 10, CL = 100pF,
S2 closed
20 50 ns
20 50 ns
20 50 ns
Time to Shutdown
tSHDN
(Note 4)
50 200 600 ns
Driver Enable from
Shutdown to Output High
tDZH(SHDN)
Figures 6 and 8, CL = 15pF,
S2 closed
40 100 ns
Driver Enable from
Shutdown to Output Low
tDZL(SHDN)
Figures 6 and 8, CL = 15pF,
S1 closed
40 100 ns
Receiver Enable from
Shutdown- to-Output High
tRZH(SHDN)
Figures 4 and 10, CL = 100pF,
S2 closed
300 1000 ns
Receiver Enable from
Shutdown- to-Output Low
tRZL(SHDN)
Figures 4 and 10, CL = 100pF,
S1 closed
300 1000 ns
_______
Note 4: The device is put into shutdown by bringing R E high and DE low. If the enable inputs are in
this state for less than 50ns, the device is guaranteed not to enter shutdown. If the enable inputs are in
this state for at least 600ns, the device is guaranteed to have entered shutdown.
________________________________________________________________________
http://www.union-ic.com Rev.05 Dec.2014
5/17
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