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): 11/15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
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions (see Note 4)
SN54HC646
SN74HC646
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
UNIT
VCC
Supply voltage
2
5
6
2
5
6
V
VCC = 2 V
1.5
VIH
High-level input voltage
VCC = 4.5 V
3.15
V
VCC = 6 V
4.2
VCC = 2 V
0.5
VIL
Low-level input voltage
VCC = 4.5 V
1.35
V
VCC = 6 V
1.8
VI
Input voltage
0
VCC
0
VCC
V
VO
Output voltage
0
VCC
0
VCC
V
VCC = 2 V
1000
tt
Input transition (rise and fall) time
VCC = 4.5 V
500
ns
VCC = 6 V
400
TA
Operating free-air temperature
–55
125
–40
85
°C
NOTE 4: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25°C
SN54HC646
SN74HC646
UNIT
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
2 V
1.9
1.998
1.9
IOH = –20 A
4.5 V
4.4
4.499
4.4
VOH
VI = VIH or VIL
6 V
5.9
5.999
5.9
V
IOH = –6 mA
4.5 V
3.98
4.3
3.7
3.84
IOH = –7.8 mA
6 V
5.48
5.8
5.2
5.34
2 V
0.002
0.1
IOL = 20 A
4.5 V
0.001
0.1
VOL
VI = VIH or VIL
6 V
0.001
0.1
V
IOL = 6 mA
4.5 V
0.17
0.26
0.4
0.33
IOL = 7.8 mA
6 V
0.15
0.26
0.4
0.33
II
Control
inputs
VI = VCC or 0
6 V
±0.1
±100
±1000
nA
IOZ
A or B
VO = VCC or 0
6 V
±0.01
±0.5
±10
±5
A
ICC
VI = VCC or 0,
IO = 0
6 V
8
160
80
A
Ci
Control
inputs
2 V to 6 V
3
10
pF
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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