WCSS0418V1P Datasheet, PDF (9/17 Pages) Weida Semiconductor, Inc. – 256K x 18 Synchronous-Pipelined Cache RAM

WCSS0418V1P
AC Test Loads and Waveforms
OUTPUT
Z₀ =50Ω
3.3V
OUTPUT
R_L =50Ω
5 pF
V_L = 1.5V
(a)
INCLUDING
JIG AND
SCOPE
R=317Ω
R=351Ω
2.5V
GND
10%
≤ 2.5 ns
ALL INPUT PULSES^[10]
90%
90%
10%
≤ 2.5 ns
(b)
(c)
Switching Characteristics Over the Operating Range^{[11, 12, 13]}
-166
-133
-100
Parameter
Description
Min.
Max.
Min.
Max.
Min. Max. Unit
t_CYC
t_CH
t_CL
t_AS
t_AH
t_CO
t_DOH
t_ADS
t_ADH
t_WES
Clock Cycle Time
6.0
7.5
10
ns
Clock HIGH
1.7
1.9
3.5
ns
Clock LOW
1.7
1.9
3.5
ns
Address Set-Up Before CLK Rise
2.0
2.5
2.5
ns
Address Hold After CLK Rise
0.5
0.5
0.5
ns
Data Output Valid After CLK Rise
3.5
4.0
5.5
ns
Data Output Hold After CLK Rise
1.5
2.0
2.0
ns
ADSP, ADSC Set-Up Before CLK Rise 2.0
2.5
2.5
ns
ADSP, ADSC Hold After CLK Rise
0.5
0.5
0.5
ns
BWE, GW, BW_[1:0] Set-Up Before CLK 2.0
2.5
2.5
ns
Rise
t_WEH
BWE, GW, BW_[1:0] Hold After CLK Rise 0.5
0.5
0.5
ns
t_ADVS
ADV Set-Up Before CLK Rise
2.0
2.5
2.5
ns
t_ADVH
ADV Hold After CLK Rise
0.5
0.5
0.5
ns
t_DS
Data Input Set-Up Before CLK Rise
2.0
2.5
2.5
ns
t_DH
Data Input Hold After CLK Rise
0.5
0.5
0.5
ns
t_CES
Chip Select Set-Up
2.0
2.5
2.5
ns
t_CEH
t_CHZ
t_CLZ
t_EOHZ
t_EOLZ
t_EOV
Chip Select Hold After CLK Rise
Clock to High-Z^[12]
Clock to Low-Z^[12]
OE HIGH to Output High-Z^{[12, 13]}
OE LOW to Output Low-Z^{[12, 13]}
OE LOW to Output Valid^[12]
0.5
0.5
0.5
ns
3.5
3.5
3.5
ns
0
0
0
ns
3.5
3.5
5.5
ns
0
0
0
ns
3.5
4.0
5.5
ns
Notes:
10. Input waveform should have a slew rate of 1 V/ns.
11. Unless otherwise noted, test conditions assume signal transition time of 3 ns or less, timing reference levels of 1.5V, input pulse levels of 0 to 3.0V, and output
loading of the specified I_OL/I_OH and load capacitance. Shown in (a) and (b) of AC Test Loads.
12. t_CHZ, t_CLZ, t_EOV, t_EOLZ, and t_EOHZ are specified with a load capacitance of 5 pF as in part (b) of AC Test Loads. Transition is measured ± 200 mV from
steady-state voltage.
13. At any given voltage and temperature, t_EOHZ is less than t_EOLZ and t_CHZ is less than t_CLZ.
Document #: 38-05247
Page 9 of 17