參數(shù)資料
型號(hào)： SN74AHCT245PWG4
廠商： Texas Instruments
文件頁數(shù)： 21/27頁
文件大?。?/td> 0K
描述： IC BUS TRANSCEIVER 8BIT 20TSSOP
標(biāo)準(zhǔn)包裝： 70
系列： 74AHCT
邏輯類型： 收發(fā)器，非反相
元件數(shù)： 1
每個(gè)元件的位元數(shù)： 8
輸出電流高，低： 8mA，8mA
電源電壓： 4.5 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 20-TSSOP（0.173"，4.40mm 寬）
供應(yīng)商設(shè)備封裝： 20-TSSOP
包裝： 管件
SCLS233O – OCTOBER 1995 – REVISED AUGUST 2013
RECOMMENDED OPERATING CONDITIONS
(1)
SN54AHCT245
SN74AHCT245
UNIT
MIN
MAX
MIN
MAX
VCC
Supply voltage
4.5
5.5
4.5
5.5
V
VIH
High-level input voltage
2
V
VIL
Low-level Input voltage
0.8
V
VI
Input voltage
0
5.5
0
5.5
V
VO
Output voltage
0
VCC
0
VCC
V
IOH
High-level output current
–8
mA
IOL
Low-level output current
8
mA
Δt/Δv
Input Transition rise or fall rate
20
ns/V
TA
Operating free-air temperature
–55
125
–40
125
°C
(1)
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 operating free-air temperature range (unless otherwise noted)
Recommended
SN54AHCT245
SN74AHCT245
TA = 25°C
SN74AHCT245
–55°C TO 125°C
–40°C TO 85°C
PARAMETER
TEST CONDITIONS
VCC
UNIT
–40°C TO 125°C
MIN
TYP
MAX
MIN
MAX
MIN
MAX
MIN
MAX
IOH = –50 A
4.4
4.5
4.4
VOH
4.5 V
V
IOH = –8 mA
3.94
3.8
3.7
IOL = 50 A
0.1
VOL
4.5 V
V
IOH = 8 mA
0.36
0.44
0 to 5.5
II
OE or DIR
VI = 5.5 V or GND
±0.1
±1(1)
±1
A
V
IOZ
A or B inputs(2)
VO = VCC or GND
5.5 V
±.25
±2.5
A
VI = VCC or
ICC
IO = 0
5.5 V
4
40
A
GND,
One input at 3.4 V, Other
ΔICC
(3)
5.5 V
1.35
1.5
mA
inputs at VCC or GND
Ci
OE or DIR
VI = VCC or GND
5 V
2.5
10
pF
Cio
A or B inputs
VI = VCC or GND
5 V
4
pF
(1)
On products compliant to MIL-PRF-38535, this parameter is not production tested at VCC = 0 V.
(2)
For I/O ports, the parameter IOZ includes the input leakage current.
(3)
This is the increase in supply current for each input at one of the specified TTL voltage levels, rather than 0 V or VCC.
SWITCHING CHARACTERISTICS
over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
Recommended
SN54AHCT245
SN74AHCT245
TA = 25°C
SN74AHCT245
FROM
TO
LOAD
–55°C TO 125°C
–40°C TO 85°C
PARAMETER
UNIT
–40°C TO 125°C
(INPUT)
(OUTPUT)
CAPACITANCE
TYP
MAX
MIN
MAX
MIN
MAX
MIN
MAX
tPLH
4.5(1)
7.7(1)
1(1)
10(1)
1
8.5
1
10
A or B
B or A
CL = 15 pF
ns
tPHL
4.5(1)
7.7(1)
1(1)
10(1)
1
8.5
1
10
tPZH
8.9(1)
13.8(1)
1(1)
16(1)
1
15
1
16
OE
A or B
CL = 15 pF
ns
tPZL
8.9(1)
13.8(1)
1(1)
16(1)
1
15
1
16
tPHZ
9.2(1)
14.4(1)
1(1)
16.5(1)
1
15.5
1
16.5
OE
A or B
CL = 15 pF
ns
tPLZ
9.2(1)
14.4(1)
1(1)
16.5(1)
1
15.5
1
16.5
tPLH
5.3
8.7
1
11
1
9.5
1
11
A or B
B or A
CL = 50 pF
ns
tPHL
5.3
8.7
1
11
1
9.5
1
11
tPZH
9.7
14.8
1
17
1
16
1
17
OE
A or B
CL = 50 pF
ns
tPZL
9.7
14.8
1
17
1
16
1
17
(1)
On products compliant to MIL-PRF-38535, this parameter is not production tested.
Copyright 1995–2013, Texas Instruments Incorporated
3
Product Folder Links: SN74AHCT245 SN54AHCT245
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