參數(shù)資料
型號: SN74HC646NT
廠商: TEXAS INSTRUMENTS INC
元件分類: 總線收發(fā)器
英文描述: HC/UH SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDIP24
封裝: ROHS COMPLIANT, PLASTIC, DIP-24
文件頁數(shù): 13/15頁
文件大小: 459K
代理商: SN74HC646NT
SN54HC646, SN74HC646
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCLS150C – DECEMBER 1982 – REVISED MARCH 2003
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 2)
PARAMETER
FROM
TO
VCC
TA = 25°C
SN54HC646
SN74HC646
UNIT
PARAMETER
(INPUT)
(OUTPUT)
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
2 V
6
11
4.4
5.5
fmax
4.5 V
31
54
22
27
MHz
6 V
36
64
25
31
2 V
65
180
270
225
CLKBA or CLKAB
A or B
4.5 V
18
36
54
45
6 V
14
31
46
38
2 V
50
135
205
170
tpd
A or B
B or A
4.5 V
14
27
41
34
ns
6 V
11
23
35
29
2 V
70
190
285
240
SBA or SAB
A or B
4.5 V
20
38
57
48
6 V
16
32
48
41
2 V
85
245
370
305
ten
OE
A or B
4.5 V
25
49
74
61
ns
6 V
20
42
63
52
2 V
85
245
370
305
tdis
OE
A or B
4.5 V
25
49
74
61
ns
6 V
20
42
63
52
2 V
80
245
370
305
ten
DIR
A or B
4.5 V
25
49
74
61
ns
6 V
20
42
63
52
2 V
80
245
370
305
tdis
DIR
A or B
4.5 V
25
49
74
61
ns
6 V
20
42
63
52
2 V
28
60
90
75
tt
Any
4.5 V
8
12
18
15
ns
6 V
6
10
15
13
These parameters are measured with the internal output state of the storage register opposite that of the bus input.
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
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