Electrical Characteristics
© 2009 Advanced Micro Devices, Inc.
45732 AMD 780E Databook 3.10
Proprietary
5-3
Table 5-6 DC Characteristics for HyperTransport™ and PCI-E Differential Clock (HT_REFCLK, GFX_REFCLK,
GPPSB_REFCLK, 100MHz)
Table 5-7 DC Characteristics for REFCLK_P Input for OSCIN (14.3181818MHz)
Table 5-8 DC Characteristics for the Memory Interface when Supporting DDR2
Table 5-5 DC Characteristics for POWERGOOD
Symbol
Description
Minimum
Typical
Maximum
VIL
Input Low Voltage
0
0V
300mV
VIH
Input High Voltage
1.62V
1.8V
1.98V
Symbol
Description
Minimum
Maximum
Unit
V
IL
Differential Input Low Voltage
-
-150
mV
V
IH
Differential Input High Voltage
+150
-
mV
V
CROSS
Absolute Crossing Point Voltage
+250
+550
mV
V
CROSS DELTA
Variation of V
CROSS
over all rising
clock edges
-
+140
mV
V
RB
Ring-back Voltage Margin
-100
+100
mV
V
IMAX
Absolute Max Input Voltage
-
+1.15
V
V
IMIN
Absolute Min Input Voltage
-
-0.15
V
Symbol
Description
Minimum
Maximum
Unit
Note
V
IL
Single Input Low Voltage
-
0.40
V
1
V
IH
Single Input High Voltage
0.70
-
V
2
V
IMAX
Absolute Max Input Voltage
-
+1.15
V
V
IMIN
Absolute Min Input Voltage
-
-0.15
V
Z
C-DC
Clock source DC impedance
40
60
Notes:
1. V
ILmax
=
VREF - 0.15V, where VREF = 0.55V
2. V
IHmin
=
VREF + 0.15V, where VREF = 0.55V
Symbol
Description
Minimum
Maximum
Comments
VIL(dc)
DC Input Low Voltage
-0.3V
VREF-0.15V
For DQ and DQS
VIH(dc)
DC Input High Voltage
VREF + 0.15V
VDDQ + 0.3V
For DQ and DQS. (VDDQ is I/O voltage
of memory device.)
VIL(ac)
AC Input Low Voltage
–
VREF - 0.31V
For DQ and DQS
VIH(ac)
AC Input High Voltage
VREF + 0.31V
–
For DQ and DQS
VUSH
Minimum Voltage Allowed for
Undershoot
- 0.3V
–
For DQ and DQS
VOSH
Maximum Voltage Allowed for
Overshoot
–
VDDQ + 0.3V
For DQ and DQS. (VDDQ is I/O voltage
of memory device.)
VOI
Output Low Voltage
0.186V
0.305V
I_out = 16.5mA
VOH
Output High Voltage
1.7V
1.9V
I_out = -16.5mA
VREF
DC Input Reference Voltage
0.882V
0.918V
ILI
Input Leakage Current
10
A
15
A
ILO
Tri-state Leakage Current
10
A
15
A
IOL
Output Low Current
19mA
28mA
IOH
Output High Current
-19mA
-29.5mA
CIN
Input Capacitance
3pF
5pF