Datasheet

mmx_txen_n
mmx_txdat
mmx_txse0
mmx_rxrcv
FSU16
FSU14
FSU15
FSU10
FSU10
FSU11
FSU11
FSU12 FSU13
FSU17
FSU18
Transmit
Receive
030-081
AM3517, AM3505
www.ti.com SPRS550E –OCTOBER 2009–REVISED MARCH 2013
Table 6-103. Low-/Full-Speed USB Switching Characteristics Bidirectional Standard 4-pin
Mode (continued)
NO. PARAMETER 1.8V, 3.3V UNIT
MIN MAX
t
F(txen)
Fall time, mmx_txen_n 4.0 ns
t
R(dat)
Rise time, mmx_txdat 4.0 ns
t
F(dat)
Fall time, mmx_txdat 4.0 ns
t
R(se0)
Rise time, mmx_txse0 4.0 ns
t
F(se0)
Fall time, mmx_txse0 4.0 ns
In mmx, x is equal to 0, 1, or 2.
Figure 6-48. Low-/Full-Speed USB Bidirectional Standard 4-pin Mode
6.6.3.3 Multiport Full-Speed Universal Serial Bus (USB) – Bidirectional Standard 3-pin Mode
The following tables assume testing over the recommended operating conditions.
Table 6-104. Low-/Full-Speed USB Timing Conditions Bidirectional Standard 3-pin Mode
TIMING CONDITION PARAMETER 1.8V, 3.3V UNIT
Input Conditions
t
R
Input signal rise time 2.0 ns
t
F
Input signal fall time 2.0 ns
Output Conditions
C
LOAD
Output load capacitance 15.0 pF
Table 6-105. Low-/Full-Speed USB Timing Requirements Bidirectional Standard 3-pin Mode
NO. PARAMETER 1.8V, 3.3V UNIT
MIN MAX
FSU19 t
d(DAT,SE0)
Time duration, mmx_txdat and mmx_txse0 low together during 14.0 ns
transition
FSU20 t
d(DAT,SE0)
Time duration, mmx_tsdat and mmx_txse0 high together during 8.0 ns
transition
Table 6-106. Low-/Full-Speed USB Switching Characteristics Bidirectional Standard 3-pin Mode
NO. PARAMETER 1.8V, 3.3V UNIT
MIN MAX
FSU21 t
d(TXENL-DATV)
Delay time, mmx_txen_n low to mmx_txdat valid 81.8 84.8 ns
FSU22 t
d(TXENL-SE0V)
Delay time, mmx_txen_n low to mmx_txse0 valid 81.8 84.8 ns
FSU23 t
s(DAT-SE0)
Skew between mmx_txdat and mmx_txse0 transition 1.5 ns
Copyright © 2009–2013, Texas Instruments Incorporated Timing Requirements and Switching Characteristics 181
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