mcm63r836 Freescale Semiconductor, Inc, mcm63r836 Datasheet - Page 9

• Manufacturer Part Number: mcm63r836
• Description: 8m Late Write Hstl
• Manufacturer: Freescale Semiconductor, Inc

NOTES:
MOTOROLA FAST SRAM
AC INPUT CHARACTERISTICS
AC Input Logic High (See Figure 4)
AC Input Logic Low (See Figures 2 and 4)
Input Reference Peak to Peak ac Voltage
Clock Input Differential Voltage
1. Inputs may overshoot to 3.3 V for up to 35% t KHKH or 1.0 ns, whichever is smaller, and 3.8 V instantaneous peak overshoot. See Figure 2.
2. Inputs may undershoot to V SS – 1.0 V for up to 35% t KHKH or 1.0 ns, whichever is smaller, and V SS – 1.5 V instantaneous peak undershoot.
3. Although considerable latitude in the selection of the nominal dc value (i.e., rms value) of V ref is supported, the peak to peak ac component
4. Minimum instantaneous differential input voltage required for differential input clock operation.
See Figure 2.
superimposed on V ref may not exceed 5% of the dc component of V ref .
DEVICE
UNDER
TEST
V ref
ZQ
0.75 V
250 Ω
Parameter
DQ
50 Ω
(See Note 1)
Freescale Semiconductor, Inc.
16.7 Ω
For More Information On This Product,
V DDQ /2
16.7 Ω
16.7 Ω
50 Ω
Go to: www.freescale.com
Figure 1. Test Loads
50 Ω
50 Ω
a. Test Load
b. Test Load
5 pF
5 pF
0.75 V
a maximum limit for each parameter. Input requirements
are specified from the external system point of view.
Thus, address setup time is shown as a minimum since
the system must supply at least that much time. On the
other hand, responses from the memory are specified
from the device point of view. Thus, the access time is
shown as a maximum since the device never provides
data later than that time.
The table of timing values shows either a minimum or
V ref (ac)
Symbol
V IH (ac)
V dif (ac)
V IL (ac)
50 Ω
50 Ω
TIMING LIMITS
0.75 V
0.75 V
V ref + 200 mV
400 mV
Min
—
—
MCM63R836 MCM63R918
V DDQ + 500 mV
V ref – 200 mV
5% V ref (dc)
Max
—
Notes
2
3
4
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