HMD4M32M8GL Datasheet, PDF (5/9 Pages) Hanbit Electronics Co.,Ltd – 16Mbyte(4Mx32) Fast Page Mode, 4K Refresh 72Pin SIMM

HANBit
HMD4M32M8GL
Column address hold time
t_CAH
10
10
ns
Column address hold referenced to /RAS
t_AR
40
45
ns
Column Address to /RAS lead time
t_RAL
25
30
ns
Read command set-up time
t_RCS
0
0
ns
Read command hold referenced to /CAS
t_RCH
0
0
ns
Read command hold referenced to /RAS
t_RRH
0
0
ns
Write command hold time
t_WCH
10
10
ns
Write command hold referenced to /RAS
t_WCR
40
45
ns
Write command pulse width
t_WP
10
10
ns
Write command to /RAS lead time
t_RWL
15
15
ns
Write command to /CAS lead time
t_CWL
13
15
ns
Data-in set-up time
t_DS
0
0
ns
Data-in hold time
t_DH
10
15
ns
Data-in hold referenced to /RAS
t_DHR
40
45
ns
Refresh period 2K Ref.
t_REF
32
32
ns
Write command set-up time
t_WCS
0
0
ns
/CAS setup time (C-B-R refresh)
t_CSR
5
5
ns
/CAS hold time (C-B-R refresh)
t_CHR
10
10
ns
/RAS precharge to /CAS hold time
t_RPC
5
5
ns
Access time from /CAS precharge
t_CPA
30
35
ns
Fast page mode cycle time
t_PC
35
40
ns
/CAS precharge time (Fast page)
t_CP
10
10
ns
/RAS pulse width (Fast page )
t_RASP
50
200K
60
200K
ns
/W to /RAS precharge time (C-B-R refresh)
t_WRP
10
10
ns
/W to /RAS hold time (C-B-R refresh)
t_WRH
10
10
ns
/CAS precharge(C-B-R counter test)
t_CPT
20
20
ns
NOTES
1.An initial pause of 200µs is required after power-up followed by any 8 /RAS-only or /CAS-before-/RAS refresh cycles
before proper device operation is achieved.
2.V_{IH (min)} and V_{IL (max)} are reference levels for measuring timing of input signals. Transition times are measured between
V_IH(min) and V_IL(max) and are assumed to be 5ns for all inputs.
3.Measured with a load equivalent to 2TTL loads and 100pF
4.Operation within the t_RCD(max) limit insures that t_RAC(max) can be met. t_RCD(max) is specified as a reference point only. If t_RCD
is greater than the specified t_RCD(max) limit, then access time is controlled exclusively by t_CAC.
5.Assumes that t_RCD ≥ t_RCD(max)
6. t_AR, t_WCR, t_DHR are referenced to t_RAD(max)
7.This parameter defines the time at which the output achieves the open circuit condition and is not referenced to V_OH or
V_OL.
8. t_WCS, t_RWD, t_CWD and t_AWD are non restrictive operating parameter.
They are included in the data sheet as electrical characteristic only. If t_WCS ≥ _tWCS(min) the cycle is an early write
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REV.1.0. (August. 2002)
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