ADS7608A4A-5 Просмотр технического описания (PDF) - A-Data Technology
Номер в каталоге
Компоненты Описание
производитель
ADS7608A4A-5 Datasheet PDF : 8 Pages
| |||
A-Data
AC Characteristics
ADS7608A4A
Parameter
-5
-5.5
-6
-7
-7.5
Symbol
Unit Note
Min Max Min Max Min Max Min Max Min Max
System clock /CAS Latency = 3 tCK3
Cycle time /CAS Latency = 2 tCK2
5
5.5
6
7
7.5
1000
1000
1000
1000
1000 ns
10
10
10
10
7.5
Clock high pulse width
tCHW 2 - 2.25 - 2.5 - 2.5 - 2.5 - ns 1
Clock low pulse width
tCLW 2 - 2.25 - 2.5 - 2.5 - 2.5 - ns 1
Access time /CAS Latency = 3 tAC3
form clock /CAS Latency = 2 tAC2
- 4.5 - 5 - 5.4 - 5.4 - 5.4
ns 2
- 6 - 6 - 6 - 6 - 5.4
/RAS cycle
time
Operation
Auto Refresh
tRC
55 - 55 - 60 - 62 - 65 -
ns
tRRC 55 - 55 - 60 - 62 - 65 -
/RAS to /CAS delay
tRCD 15 - 16.5 - 18 - 20 - 15 - ns
/RAS active time
tRAS 40 100K 38.5 100K 42 100K 42 120K 45 120K ns
/RAS precharge time
tRP
15 - 16.5 - 18 - 20 - 15 - ns
/RAS to /RAS bank active delay tRRD 10 - 11 - 12 - 14 - 15 - ns
/CAS to /CAS delay
tCCD 1 - 1 - 1 - 1 - 1 - CLK
Write command to data – in delay tWTL 0 - 0 - 0 - 0 - 0 - CLK
Data – in to precharge command tDPL 1 - 1 - 1 - 1 - 1 - CLK
Data – in active command
tDAL 5 - 5 - 5 - 4 - 4 - CLK
DQM to data – out Hi-Z
tDQZ 2 - 2 - 2 - 2 - 2 - CLK
DQM to data – in mask
tDQM 0 - 0 - 0 - 0 - 0 - CLK
Data – out hold time
tOH 1.5 - 2 - 2.7 - 2.7 - 2.7 - ns
Data – input setup time
tDS
1.5 - 1.5 - 1.5 - 1.5 - 1.5 - ns 1
Data – input hold time
tDH
1 - 1 - 1 - 1 - 1 - ns 1
Address setup time
tAS
1.5 - 1.5 - 1.5 - 1.5 - 1.5 - ns 1
Address hold time
tAH
1 - 1 - 1 - 1 - 1 - ns 1
CKE setup time
tCKS 1.5 - 1.5 - 1.5 - 1.5 - 1.5 - ns 1
CKE hold time
tCKH 1 - 1 - 1 - 1 - 1 - ns 1
Command setup time
tCS
1.5 - 1.5 - 1.5 - 1.5 - 1.5 - ns 1
Command hold time
tCH
1 - 1 - 1 - 1 - 1 - ns 1
CLK to data output in low Z-time tOLZ 1 - 1 - 1 - 1.5 - 1.5 - ns
MRS to new command
tMRD 2 - 2 - 2 - 1 - 1 - CLK
Power down exit time
tPDE 1 - 1 - 1 - 1 - 1 - CLK
Self refresh exit time
tSRE 1 - 1 - 1 - 1 - 1 - CLK 3
Refresh time
tREF 64 - 64 - 64 - 64 - 64 - ms
Note : 1. Assume tR / tF (input rise and fall time) is 1 ns.
2. Access times to be measured with input signals of 1v / ns edge rate.
3.A new command can be given tRRC after self refresh exit.
Rev 1 April, 2001
6
Share Link: 