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參數(shù)資料
| 型號： | HM-6561883 |
| 廠商： | Intersil Corporation |
| 英文描述： | 256 x 4 CMOS RAM |
| 中文描述： | 256 × 4 CMOS存儲器 |
| 文件頁數(shù)： | 6/9頁 |
| 文件大?。?/td> | 143K |
| 代理商： | HM-6561883 |
6-122
Timing Waveforms
The HM-6561/883 Read Cycle is initiated on the falling edge
of E. This signal latches the input address word into on-chip
registers. Minimum address setup and hold times must be
met. After the required hold time, the address lines may
change state without affecting device operation. In order to
read the output data E, S1 and S2 must be low and W must
be high. The output data will be valid at access time
(TELQV).
The HM-6561/883 has output data latches that are con-
trolled by E. On the rising edge of E the present data is
latched and remains latched until E falls. Either or both S1 or
S2 may be used to force the output buffers into a high
impedance state.
(7) TAVEL
(7) TAVEL
(8)
TELAX
HIGH
HIGH Z
PREVIOUS DATA
VALID DATA LATCHED
HIGH Z
(4)
TSHQZ
(4)
TSLQX
(4)
TSHQZ
A
E
DQ
S1, S2
-1
TIME
0
1
2
3
4
5
REFERENCE
W
VALID
(5) TELEH
(17) TELEL
(6) TEHEL
(6) TEHEL
(1) TELQV
(2) TAVQV
FIGURE 1. READ CYCLE
TRUTH TABLE
TIME
REFERENCE
INPUTS
OUTPUT
FUNCTION
E
S1
W
A
DQ
-1
H
H
X
X
Z
Memory Disabled
0
X
H
V
Z
Cycle Begins, Addresses are Latched
1
L
L
H
X
X
Output Enabled
2
L
L
H
X
V
Output Valid
3
L
H
X
V
Output Latched
4
H
H
X
X
Z
Device Disabled, Prepare for Next Cycle (Same as -1)
5
X
H
V
Z
Cycle Ends, Next Cycle Begins (Same as 0)
NOTE: 1. Device selected only if both S1 and S2 are low, and deselected if either S1 or S2 are high.
HM-6561/883
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HM1-6561883 | 256 x 4 CMOS RAM |
| HM1-65787H-2 | HIGH SPEED CMOS SRAM |
| HM3-65787H-2 | HIGH SPEED CMOS SRAM |
| HM4-65787H-2 | HIGH SPEED CMOS SRAM |
| HMT-65787H-2 | HIGH SPEED CMOS SRAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HM-65642 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:8K x 8 Asynchronous CMOS Static RAM |
| HM-65642/883 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:8K x 8 Asynchronous CMOS Static RAM |
| HM-65642_02 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:8K x 8 Asynchronous CMOS Static RAM |
| HM-65642883 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:8K x 8 Asynchronous CMOS Static RAM |
| HM656R0 | 制造商:TT Electronics / BI Technologies 功能描述:HI CURRENT LOW PROFILE SMT INDUCTOR |
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