PX1011B All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 6 — 27 June 2011 22 of 32
NXP Semiconductors
PX1011B
PCI Express stand-alone X1 PHY
[1] Reference voltage for SSTL_2 class I I/O.
Fig 17. Differential measurement points
dV/dt
at rising edge
dV/dt
at falling edge
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V
IH
= +150 mV
0.0 V
V
IL
= −150 mV
REFCLK+
minus
REFCLK−
Table 19. PXPIPE characteristics
Symbol Parameter Conditions Min Typ Max Unit
f
RXCLK
RXCLK frequency 249.925 250 250.075 MHz
f
TXCLK
TXCLK frequency 249.925 250 250.075 MHz
V
VREFS
voltage on pin VREFS
[1]
1.13 1.25 1.38 V
V
OH(SSTL2)
SSTL_2 HIGH-level output voltage AC V
TT
+0.61 - - V
V
OL(SSTL2)
SSTL_2 LOW-level output voltage AC - - V
TT
0.61 V
V
IH(SSTL2)
SSTL_2 HIGH-level input voltage AC V
ref
+0.31 - - V
V
IL(SSTL2)
SSTL_2 LOW-level input voltage AC - - V
ref
0.31 V
Input signals; measured with respect to TXCLK
t
su(TX)(PXPIPE)
set-up time of PXPIPE input signal see Figure 18 500 - - ps
t
h(TX)(PXPIPE)
hold time of PXPIPE input signal see Figure 18 500 - - ps
Output signals; measured with respect to RXCLK
t
su(RX)(PXPIPE)
set-up time of PXPIPE output signal see Figure 18 1500 - - ps
t
h(RX)(PXPIPE)
hold time of PXPIPE output signal see Figure 18 1500 - - ps
Fig 18. Definition of PXPIPE timing
PXPIPE
INPUT
TXCLK
PXPIPE
OUTPUT
RXCLK
t
h(RX)(PXPIPE)
t
su(RX)(PXPIPE)
t
h(TX)(PXPIPE)
t
su(TX)(PXPIPE)
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