Specifications

PENTIUM® PRO PROCESSOR AT 150, 166, 180, and 200 MHz E
46
Where, T
CO-MIN
is the minimum clock-to-out delay of
the driving agent, T
HOLD-MIN
is the minimum hold time
required by the receiver, and T
CLK_SKEW-MAX
is
defined above. The Hold time equation is
independent of clock jitter, since data is released by
the driver and is required to be held at the receiver
on the same clock edge.
4.2. General GTL+ I/O Buffer
Specification
This specification identifies the key parameters for
the driver, receiver, and package that must be met to
operate in the system environment described in the
previous section. All specifications must be met over
all possible operating conditions including
temperature, voltage, and semiconductor process.
This information is included for designers of
components for a GTL+ bus.
4.2.1. I/O Buffer DC Specification
Table 21 contains the I/O Buffer DC parameters.
Table 21. I/O Buffer DC Parameters
Symbol Parameter Min Max Units Notes
V
OL
Driver Output Low Voltage 0.600 V 1
V
IH
Receiver Input High Voltage V
REF
+ 0.2 V 2
V
IL
Receiver Input Low Voltage V
REF
– 0.2 V 2
V
ILC
Input Leakage Current 10 µA3
C
IN
, C
o
Total Input/Output Capacitance 10 pF 4
NOTES:
1. Measured into a 25Ω test load tied to V
TT
= 1.5 V, as shown in Figure 32.
2. V
REF
= 2/3 VTT
.
(V
TT
= 1.5 V ±10%), V
REF
has an additional tolerance of ± 2%.
3. This parameter is for inputs without internal pull-ups or pull downs and 0 ≤ V
IN
≤ V
TT
.
4. Total capacitance, as seen from the attachment node on the network, which includes traces on the PCB, IC socket,
component package, driver/receiver capacitance, and ESD structure capacitance.