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MCM69P819ZP4R 数据表(PDF) 10 Page - Motorola, Inc

部件名 MCM69P819ZP4R
功能描述  256K x 18 Bit Pipelined BurstRAM Synchronous Fast Static RAM
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制造商  MOTOROLA [Motorola, Inc]
网页  http://www.freescale.com
标志 MOTOROLA - Motorola, Inc

MCM69P819ZP4R 数据表(HTML) 10 Page - Motorola, Inc

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MCM69P819
10
MOTOROLA FAST SRAM
AC OPERATING CONDITIONS AND CHARACTERISTICS
(VDD = 3.3 V + 10%, – 5%, TA = 0 to 70°C, Unless Otherwise Noted)
Input Timing Measurement Reference Level
1.25 V
. . . . . . . . . . . . . .
Input Pulse Levels
0 to 2.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Rise/Fall Time
1.0 V/ns (20 to 80%)
. . . . . . . . . . . . . . . . . . . . . .
Output Timing Reference Level
1.25 V
. . . . . . . . . . . . . . . . . . . . . . . . .
Output Load
See Figure 2 Unless Otherwise Noted
. . . . . . . . . . . . . .
READ/WRITE CYCLE TIMING (See Notes 1 and 2)
P
Sb l
MCM69P819–3.5
166 MHz
MCM69P819–3.8
150 MHz
MCM69P819–4
133 MHz
Ui
N
Parameter
Symbol
Min
Max
Min
Max
Min
Max
Unit
Notes
Cycle Time
tKHKH
6
6.7
7.5
ns
Clock High Pulse Width
tKHKL
2.4
2.6
3
ns
3
Clock Low Pulse Width
tKLKH
2.4
2.6
3
ns
3
Clock Access Time
tKHQV
3.5
3.8
4
ns
Output Enable to Output Valid
tGLQV
3.5
3.5
3.8
ns
Clock High to Output Active
tKHQX1
0
0
0
ns
4, 5
Clock High to Output Change
tKHQX2
1.5
1.5
1.5
ns
4
Output Enable to Output Active
tGLQX
0
0
0
ns
4, 5
Output Disable to Q High–Z
tGHQZ
3.5
3.5
3.8
ns
4, 5
Clock High to Q High–Z
tKHQZ
1.5
6
1.5
6.7
1.5
7.5
ns
4, 5
Setup Times:
Address
ADSP, ADSC, ADV
Data In
Write
Chip Enable
tADKH
tADSKH
tDVKH
tWVKH
tEVKH
1.5
1.5
1.5
ns
Hold Times:
Address
ADSP, ADSC, ADV
Data In
Write
Chip Enable
tKHAX
tKHADSX
tKHDX
tKHWX
tKHEX
0.5
0.5
0.5
ns
NOTES:
1. Write is defined as either any SBx and SW low or SGW is low. Chip Enable is defined as SE1 low, SE2 high, and SE3 low whenever ADSP
or ADSC is asserted.
2. All read and write cycle timings are referenced from K or G.
3. In order to reduce test correlation issues and to reduce the effects of application specific input edge rate variations on correlation between
data sheet parameters and actual system performance, FSRAM AC parametric specifications are always specified at VDDQ/2. In some
design exercises, it is desirable to evaluate timing using other reference levels. Since the maximum test input edge rate is known and is
given in the AC Test Conditions section of the data sheet as 1 V/ns, one can easily interpolate timing values to other reference levels.
4. This parameter is sampled and not 100% tested.
5. Measured at
± 200 mV from steady state.
OUTPUT
Z0 = 50 Ω
RL = 50 Ω
1.25 V
Figure 2. AC Test Load


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