Intel Itanium 2 Processor Parameter Description Specification Units, Absolute Pulse Duration ns

Electrical Specifications

3.If multiple overshoots and/or multiple undershoots occur, measure the worst-case pulse duration for each magnitude and compare the results against the AF = 1 specifications. If all of these worst-case overshoot or undershoot events meet the specifications (measured time < specifications) in the table (where AF = 1), then the system passes.

Table 2-13. Source Synchronous AGTL+ Signal Group and Wired-OR Signal Group Absolute Overshoot/Undershoot Tolerance

Parameter	Description	Specification	Units
VCTERM	I/O power supply voltage (nominal).	1.20	V
VMAX	Maximum absolute voltage for system bus signals at the input	1.80	V
	of the receiver buffers.
VMIN	Minimum absolute voltage for system bus signals at the input of	–0.60	V
	the receiver buffers.
Overshoot	Time dependent overshoot amount above VCTERM .	1
Undershoot	Time dependent undershoot amount below GND.	1

NOTES:

1. These parameters cannot be specified in absolute terms.

NOTES: The following notes apply to Table 2-14through Table 2-21:

1.Absolute Maximum Overshoot magnitude of 1.8V must never be exceeded.

2.Absolute Maximum Overshoot is measured referenced to GND. Pulse duration of overshoot is measured relative to VCTERM.

3.Absolute Maximum Undershoot and Pulse Duration of undershoot is measured relative to VCTERM.

4.Ringback below VCTERM cannot be subtracted from overshoots/undershoots.

5.Lesser undershoot does not allocate overshoot with longer duration or greater magnitude.

6.All values specified by design characterization.

Table 2-14. Itanium® 2 Processors (900 MHz, 1.0 GHz, 1.3 GHz, 1.4 GHz, 1.5 GHz/6 MB) Source Synchronous AGTL+ Signal Group Time Dependent Overshoot/Undershoot Tolerance for 400 MHz System Bus

Absolute				Pulse Duration (ns)
Maximum (V)
Over-	Under-	AF = 11	AF = 0.75	AF = 0.5	AF = 0.25	AF = 0.1	AF = 0.05	AF = 0.01
shoot	shoot
1.8	–0.6	0.0083	0.0089	0.0137	0.02750	0.0688	0.1376	0.6863
1.75	–0.55	0.0206	0.0276	0.0413	0.0827	0.2067	0.4139	2.0680
1.7	–0.5	0.0621	0.0828	0.1239	0.2480	0.6207	1.2420	2.5
1.65	–0.45	0.1851	0.2470	0.3702	0.7392	1.8500	2.5	2.5
1.6	–0.4	0.5477	0.7296	1.0972	2.1915	2.5	2.5	2.5
1.55	–0.35	1.6100	2.1451	2.5	2.5	2.5	2.5	2.5
1.5	–0.3	2.5	2.5	2.5	2.5	2.5	2.5	2.5
1.45	–0.25	2.5	2.5	2.5	2.5	2.5	2.5	2.5

NOTES:

1. Activity factor = 1 means signal toggles every 5 ns.

26 Datasheet