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. VHavg 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. VHavg can be measured directly using “Vtop” on Agilent* and “High” on Tektronix oscilloscopes.
6. VCROSS 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 VIH.
Table 7-15. System Reference Clock (BCLK{0/1}) DC Specifications
Symbol Parameter Signal Min Max Unit Figure Notes1
VBCLK_diff_ih Differential Input High Voltage Differential 0.150 N/A V —
VBCLK_diff_il Differential Input Low Voltage Differential — -0.150 V —
Vcross (abs) Absolute Crossing Point Single Ended 0.250 0.550 V 2, 4, 7
Vcross(rel)
Relative Crossing Point
Single Ended
0.250 +
0.5*(VHavg –
0.700)
0.550 +
0.5*(VHavg –
0.700)
V 3, 4, 5
Vcross Range of Crossing Points Single Ended N/A 0.140 V 6
VTH Threshold Voltage Single Ended Vcross - 0.1 Vcross + 0.1 V — —
IIL Input Leakage Current N/A — 1.50 A— 8
Cpad Pad Capacitance N/A 0.9 1.2 pF — —
Table 7-16. SMBus DC Specifications
Symbol Parameter Min Max Units Notes
VIL Input Low Voltage — 0.3*VTT V
VIH Input High Voltage 0.7*VTT — V
VHysteresis Hysteresis 0.1*VTT — V
VOL Output Low Voltage — 0.2*VTT V
RON Buffer On Resistance 4 14
ILLeakage Current 50 200 A
Output Edge Rate (50 ohm to VTT
, between VIL and VIH) 0.05 0.6 V/ns