HMD4M1Z1 Datasheet, PDF (4/6 Pages) Hanbit Electronics Co.,Ltd – 4Mbit(4Mx1bit) Fast Page Mode, 1K Refresh, 20Pin ZIP, 5V Design

HANBit
HMD4M1Z1
t_RCH
Read Command Hold Time to /CAS
0
0
ns
8
t_RRH
t_WCH
t_WP
t_RWL
t_CWL
t_DS
t_DH
t_REF
t_wcs
t_CWD
t_RWD
t_AWD
t_CPWD
t_CSR
Read Command Hold Time to /RAS
Write Command Hold Time
Write Command Pulse Width
Write Command to /RAS Lead Time
Write Command to /CAS Lead Time
Data-in Setup Time
Data-in Hold Time
Refresh Period (1024 Cycle)
Write Command Setup Time
/CAS to /WE delay time
/RAS to /WE delay time
Column Address to /WE delay time
/CAS precharge to /WE delay time
/CAS Setup Time
(/CAS-before-/RAS Refresh Cycle)
0
0
ns
8
10
10
ns
10
10
ns
15
15
ns
13
15
ns
0
0
ns
9
10
10
ns
9
16
16
ms
0
0
ms
7
15
15
ms
7,13
50
60
ns
7
25
30
ns
7
30
35
ns
7
15
10
10
ns
/CAS Hold Time
t_CHR
10
(/CAS-before-/RAS Refresh Cycle)
10
ns
16
t_RPC
/RAS Precharge to /CAS Hold Time
5
t_CPA
Access Time from /CAS Precharge
t_PC
Fast Page Mode Cycle Time
35
t_CP
Fast Page Mode /RAS Precharge Time
10
t_RASP
Fast Page Mode /CAS Pulse Time
50
/RAS Hold Time time from /CAS
t_RHCP
30
Precharge
30
200K
5
ns
35
ns
3
40
ns
10
ns
12
60
200K
ns
35
ns
t_RASS
/RAS Pulse Width(CBR self refresh)
100
100
us
t_PRS
/RAS Precharge Time(CBR self refresh)
90
110
ns
t_CHS
/CAS Hold Time(CBR self refresh)
-50
-50
ns
Note: 1. An initial pause of 200us is required after power-up followed by any 8 /RAS-only refresh or /CAS-before-/RAS refresh
cycles
before proper device operation is achieved.
2. Input voltage levels are V_IH / V_IL. V_IH(min) and V_IL(max) are reference levels for measuring timing of input signals.
Also, transition times are measured between _. V_IH and V_IL are assumed to be 5ns for all inputs.
3. Measured with a load circuit equivalent to 2TTL loads and 100pF.
4. Operation with 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. This parameter defines the time at which the output achieves the open circuit condition and is not referenced to V_OH /
V_{OL .}
URL:www.hbe.co.kr
REV.1.0 (August. 2002)
4
HANBit Electronics Co.,Ltd.