參數(shù)資料
型號: HM62A16256CBPI
廠商: Hitachi,Ltd.
英文描述: 4 M SRAM (256-kword ×16-bit)(4M靜態(tài)RAM (256k字 ×16位))
中文描述: 四米的SRAM(256 - KWord的× 16位)(4分靜態(tài)隨機(jī)存儲器(256k字× 16位))
文件頁數(shù): 14/18頁
文件大?。?/td> 125K
代理商: HM62A16256CBPI
HM62A16256CBPI Series
14
Low V
CC
Data Retention Characteristics
(Ta = –40 to +85
°
C)
Parameter
Symbol
Min
Typ
*
4
Max
Unit
Test conditions
*
3
V
CC
for data retention
V
DR
1.0
2.0
V
Vin
0V
(1) 0 V
CS2
0.2 V or
(2) CS2
V
CC
– 0.2 V
CS1
V
CC
– 0.2 V or
(3)
LB
=
UB
V
– 0.2 V
CS2
V
– 0.2 V
CS1
0.2 V
V
= 1.2 V, Vin
0V
(1) 0 V
CS2
0.2 V or
(2) CS2
V
CC
– 0.2 V,
CS1
V
CC
– 0.2 V or
(3)
LB
=
UB
V
– 0.2 V
CS2
V
– 0.2 V
CS1
0.2 V
Data retention current
I
CCDR
*
1
0.3
3
μ
A
I
CCDR
*
2
t
CDR
0.3
2
μ
A
Chip deselect to data
retention time
0
ns
See retention waveform
Operation recovery time
Notes: 1. This characteristic is guaranteed only for L-version.
2. This characteristic is guaranteed only for L-SL version.
3. CS2 controls address buffer,
WE
buffer,
CS1
buffer,
OE
buffer,
LB
,
UB
buffer and Din buffer. If
CS2 controls data retention mode, Vin levels (address,
WE
,
OE
,
CS1
,
LB
,
UB
, I/O) can be in the
high impedance state. If
CS1
controls data retention mode, CS2 must be CS2
V
– 0.2 V or 0 V
CS2
0.2 V. The other input levels (address,
WE
,
OE
,
LB
,
UB
, I/O) can be in the high
impedance state.
4. Typical values are at V
CC
= 1.2 V, Ta = +25C and not guaranteed.
5. t
RC
= read cycle time.
t
R
t
RC
*
5
ns
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