Vol 1
Electrical Specifications
90 Intel® Xeon® Product 2800/4800/8800 v2 Product Family
Datasheet Volume One, February 2014
Notes:
1. Unless otherwise noted, all specifications in this table apply to all processor frequencies.
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 Vih.
Table 6-17. 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 6-13
V
BCLK_diff_il
Differential Input Low Voltage Differential -0.150 V 6-13
V
cross
(abs) Absolute Crossing Point Single Ended 0.250 0.550 V 6-10
6-14
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 6-10 3, 4, 5
ΔV
cross
Range of Crossing Points Single Ended N/A 0.140 V 6-15 6
V
TH
Threshold Voltage Single Ended Vcross - 0.1 VcrIoss + 0.1 V
I
IL
Input Leakage Current N/A 1.50 uA 8
C
pad
Pad Capacitance N/A 0.9 1.1 pF
Table 6-18. 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
OL
Output Low Voltage 0.2*V
TT
V
V
OH
Output High Voltage V
TT(max)
V
R
ON
Buffer On Resistance 14 W
I
L
Leakage Current
Signals MEM_SCL_C[3:0], MEM_SDA_C[3:0]
-100 +100 uA
I
L
Leakage Current
Signals VPP_SCL, VPP_SDA
(R
TEST
= 50 ohm)
+900 uA
Table 6-19. JTAG and TAP Signals DC Specifications (Sheet 1 of 2)
Symbol Parameter Min Max Units Notes
V
IL
Input Low Voltage 0.3*V
TT
V
V
IH
Input High Voltage 0.7*V
TT
V
V
OL
Output Low Voltage
(R
TEST
= 500 ohm)
0.12*V
TT
V
V
OH
Output High Voltage
(R
TEST
= 500 ohm)
0.88*V
TT
V
R
ON
Buffer On Resistance
Signals BPM_N[7:0], TDO, EAR_N
14 W
I
IL
Input Leakage Current
Signals PREQ_N, TCK, TDI, TMS, TRST_N
-50 +50 uA