AS4C32M16D2A-25BAN Datasheet, PDF (32/61 Pages) Alliance Semiconductor Corporation – Fully synchronous operation

AS4C32M16D2A-25BAN
Table 30. Input clock jitter spec parameter
Parameter
Symbol
-18
Min. Max.
Clock period jitter
t_{JIT (}per)
-90
90
Clock period jitter during DLL locking
period
t_JIT (per,lck)
-80
80
Cycle to cycle clock period jitter
t_JIT (cc) -180 180
Cycle to cycle clock period jitter
during DLL locking period
Cumulative error across 2 cycles
t_JIT (cc,lck) -160 160
t_ERR (2per) -132 132
Cumulative error across 3 cycles
t_ERR (3per) -157 157
Cumulative error across 4 cycles
t_ERR (4per) -175 175
Cumulative error across 5 cycles
t_ERR (5per) -188 188
Cumulative error across n cycles,
n=6...10, inclusive
Cumulative error across n cycles,
n=11...50, inclusive
Duty cycle jitter
t_ERR (6-
10per)
-250
250
t_ERR (11-
50per)
-425
425
t_JIT (duty) -75
75
-25
Min. Max.
-100 100
-80 80
-200 200
-160 160
-150 150
-175 175
-200 200
-200 200
-300 300
-450 450
-100 100
-3
Units Notes
Min. Max.
-125 125 ps 33
-100 100 ps 33
-250 250 ps 33
-200 200 ps 33
-175 175 ps 33
-225 225 ps 33
-250 250 ps 33
-250 250 ps 33
-350 350 ps 33
-450 450 ps 33
-125 125 ps 33
Definitions:
- t_CK(avg)
t_CK(avg) is calculated as the average clock period across any consecutive 200 cycle window.
t ^∑ t ^{( ) ⎡ N ⎤}
avg
CK
=⎢
⎣ ^{j =1}
CK
j
⎥
⎦
/
N
where N=200
- t_CH(avg) and t_CL(avg)
t_CH(avg) is defined as the average HIGH pulse width, as calculated across any consecutive 200 HIGH pulses.
t ^∑t ⁽ t ^{) ( ) ( ) ⎡ N ⎤}
avg
CH
=⎢
⎣ ^{j =1}
CH_j
⎥
⎦
/
N×
avg
CK
where N=200
t_CL(avg) is defined as the average LOW pulse width, as calculated across any consecutive 200 LOW pulses.
t ^∑t ⁽ t ^{) ( ) ( ) ⎡ N ⎤}
avg
CL
=⎢
⎣ ^{j =1}
CL
j
⎥
⎦
/
N×
avg
CK
where N=200
t_JIT (duty) is defined as the cumulative set of t_CH jitter and t_CL jitter. t_CH jitter is the largest deviation of
any single t_CH from t_CH(avg). t_CL jitter is the largest deviation of any single t_CL from t_CL(avg).
- t_JIT(duty) = Min/max of {t_JIT(CH), t_JIT(CL)}
where,
t_JIT(CH) = {t_CHi- t_CH(avg) where i=1 to 200}
t_JIT(CL) = {t_CLi- t_CL(avg) where i=1 to 200}
Alliance Memory Inc. 511 Taylor Way, San Carlos, CA 94070 TEL: [phone] FAX: [phone]
Alliance Memory Inc. reserves the right to change products or specification without notice
Rev.1.4
32
Jun./2014