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P4C1041L Datasheet(HTML) 7 Page - Pyramid Semiconductor Corporation

Part No. P4C1041L
Description  LOW POWER 256K x 16 (4 MEG) STATIC CMOS RAM
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Maker  PYRAMID [Pyramid Semiconductor Corporation]
Homepage  http://www.pyramidsemiconductor.com
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P4C1041L Datasheet(HTML) 7 Page - Pyramid Semiconductor Corporation

 
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P4C1041L - LOW POWER 256K X 16 STATIC CMOS RAM
Page 7
Document # SRAM142 REV OR
AC TEST COnDITIOnS
Input Pulse Levels
GND to 3.0V
Input Rise and Fall Times
3ns
Input Timing Reference Level
1.5V
Output Timing Reference Level
1.5V
Output Load
See Figures 1 and 2
Figure 1. Output Load
Figure 2. Thevenin Equivalent
* including scope and test fixture.
note:
Because of the ultra-high speed of the P4C1041L, care must be taken
whentestingthisdevice;aninadequatesetupcancauseanormalfunction-
ing part to be rejected as faulty. Long high-inductance leads that cause
supply bounce must be avoided by bringing the V
CC and ground planes
directly up to the contactor fingers. A 0.01 µF high frequency capacitor
is also required between V
CC and ground. To avoid signal reflections,
proper termination must be used; for example, a 50Ω test environment
should be terminated into a 50Ω load with 1.77V (Thevenin Voltage) at
the comparator input, and a 589Ω resistor must be used in series with
D
OUT to match 639Ω (Thevenin Resistance).
TRUTH TABLE
Mode
CE
OE
WE
BLE
BHE
I/O
0 - I/O7
I/O
8 - I/O15
Power
Powerdown
H
x
x
x
x
High Z
High Z
Standby
Read All Bits
L
L
H
L
L
D
OUT
D
OUT
Active
Read Lower Bits Only
L
L
H
L
H
D
OUT
High Z
Active
Read Upper Bits Only
L
L
H
H
L
High Z
D
OUT
Active
Write All Bits
L
x
L
L
L
D
IN
D
IN
Active
Write Lower Bits Only
L
x
L
L
H
D
IN
High Z
Active
Write Upper Bits Only
L
x
L
H
L
High Z
D
IN
Active
Selected, Outputs Disabled
L
H
H
x
x
High Z
High Z
Active


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