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Datasheet 69
Electrical Specifications
Notes:
1. Unless otherwise noted, all specifications in this table apply to all processor frequencies. These specifications are specified at
the processor pad.
2. Crossing Voltage is defined as the instantaneous voltage value when the rising edge of BCLK{0/1}_DN is equal to the falling
edge of BCLK{0/1}_DP.
3. V
Havg
is the statistical average of the VH measured by the oscilloscope.
4. The crossing point must meet the absolute and relative crossing point specifications simultaneously.
5. V
Havg
can be measured directly using “Vtop” on Agilent* and “High” on Tektronix oscilloscopes.
6. V
CROSS
is defined as the total variation of all crossing voltages as defined in Note 3.
7. The rising edge of BCLK{0/1}_DN is equal to the falling edge of BCLK{0/1}_DP.
8. For Vin between 0 and V
IH
.
Table 7-15. System Reference Clock (BCLK{0/1}) DC Specifications
Symbol Parameter Signal Min Max
Unit Figure Notes
1
V
BCLK_diff_ih
Differential Input High Voltage Differential 0.150 N/A V —
V
BCLK_diff_il
Differential Input Low Voltage Differential — -0.150 V —
V
cross
(abs) Absolute Crossing Point Single Ended 0.250 0.550 V 2, 4, 7
V
cross
(rel)
Relative Crossing Point
Single Ended
0.250 +
0.5*(VH
avg
–
0.700)
0.550 +
0.5*(VH
avg
–
0.700)
V 3, 4, 5
V
cross
Range of Crossing Points Single Ended N/A 0.140 V 6
V
TH
Threshold Voltage Single Ended Vcross - 0.1 Vcross + 0.1 V — —
I
IL
Input Leakage Current N/A — 1.50 A— 8
C
pad
Pad Capacitance N/A 0.9 1.2 pF — —
Table 7-16. SMBus DC Specifications
Symbol Parameter Min Max Units Notes
V
IL
Input Low Voltage — 0.3*V
TT
V
V
IH
Input High Voltage 0.7*VTT — V
V
Hysteresis
Hysteresis 0.1*VTT — V
V
OL
Output Low Voltage — 0.2*V
TT
V
R
ON
Buffer On Resistance 4 14
I
L
Leakage Current 50 200 A
Output Edge Rate (50 ohm to V
TT
, between V
IL
and V
IH
) 0.05 0.6 V/ns