參數(shù)資料
型號(hào): 74HC7404N
廠商: NXP SEMICONDUCTORS
元件分類: FIFO
英文描述: 5-Bit x 64-word FIFO register; 3-state
中文描述: 64 X 5 OTHER FIFO, 98 ns, PDIP18
封裝: PLASTIC, DIP-18
文件頁(yè)數(shù): 14/28頁(yè)
文件大小: 131K
代理商: 74HC7404N
September 1993
14
Philips Semiconductors
Product specification
5-Bit x 64-word FIFO register; 3-state
74HC/HCT7404
Master reset applied with FIFO full
Notes to
Fig.9
1.
2.
3.
4.
5.
DIR LOW, output ready HIGH; assume FIFO is full
MR pulse LOW; clears FIFO
DIR goes HIGH; flag indicates input prepared for valid data
DOR goes LOW; flag indicates FIFO empty
Q
n
outputs go LOW (only last bit will be reset).
Fig.9 Waveforms showing the MR input to DIR, DOR and Q
n
output propagation delays and the MR pulse width.
handbook, halfpage
tPHL
VM
3
(1)
t
W
tPLH
DIR OUTPUT
VM
(1)
MR INPUT
VM
(1)
MGA668
Qn OUTPUT
tPHL
4
5
1
2
DOR OUTPUT
(1) HC
:
V
M
= 50%; V
I
= GND to V
.
V
M
= 1.3 V; V
I
= GND to 3 V.
HCT :
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