74F240 PDF даташит
Спецификация 74F240 изготовлена «Fairchild» и имеет функцию, называемую «Octal Buffers/Line Drivers with 3-STATE Outputs». |
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Детали детали
Номер произв | 74F240 |
Описание | Octal Buffers/Line Drivers with 3-STATE Outputs |
Производители | Fairchild |
логотип |
10 Pages
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74F240, 74F244
Octal Buffers/Line Drivers with 3-STATE Outputs
May 2007
tm
Features
■ 3-STATE outputs drive bus lines or buffer memory
address registers
■ Outputs sink 64mA (48mA mil)
■ 12mA source current
■ Input clamp diodes limit high-speed termination
effects
General Description
The 74F240 and 74F244 are octal buffers and line driv-
ers designed to be employed as memory and address
drivers, clock drivers and bus-oriented transmitters/
receivers which provide improved PC and board density.
Ordering Information
Order Code
74F240SC(1)
74F240SJ(1)
74F240PC
74F244SC(1)
74F244SJ(1)
74F244MSA(1)
74F244PC
Package
Number
Package Description
M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
MSA20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide
N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Note:
1. Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering number.
Connection Diagrams
74F240
74F244
©1988 Fairchild Semiconductor Corporation
74F240, 74F244 Rev. 1.4
www.fairchildsemi.com
No Preview Available ! |
Logic Symbols
IEEE/IEC
74F240
IEEE/IEC
74F244
Unit Loading/Fan Out
Pin Names
Description
OE1, OE2
OE2
I0–I7
I0–I7
O0–O7, O0–O7
3-STATE Output Enable Input (Active LOW)
3-STATE Output Enable Input (Active HIGH)
Inputs (74F240)
Inputs (74F244)
Outputs
Note:
2. Worst-case 74F240 enabled; 74F244 disabled.
U.L.
HIGH/LOW
1.0 / 1.667
1.0 / 1.667
1.0 / 1.667(2)
1.0 / 2.667(2)
600 / 106.6 (80)
Input IIH / IIL,
Output IOH / IOL
20µA / –1mA
20µA / –1mA
20µA / –1mA
20µA / –1.6mA
–12mA / 64mA (48mA)
Truth Tables
74F240
OE1 D1n O1n OE2 D2n O2n
HXZHXZ
LHL LHL
L LHL LH
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
74F244
OE1 D1n O1n OE2 D2n O2n
HXZHXZ
L HH L HH
LLLLLL
©1988 Fairchild Semiconductor Corporation
74F240, 74F244 Rev. 1.4
2
www.fairchildsemi.com
No Preview Available ! |
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol
TSTG
TA
TJ
VCC
VIN
IIN
VO
Parameter
Storage Temperature
Ambient Temperature Under Bias
Junction Temperature Under Bias
VCC Pin Potential to Ground Pin
Input Voltage(3)
Input Current(3)
Voltage Applied to Output in HIGH State (with VCC = 0V)
Standard Output
3-STATE Output
Current Applied to Output in LOW State (Max.)
ESD Last Passing Voltage (Min.)
Rating
–65°C to +150°C
–55°C to +125°C
–55°C to +150°C
–0.5V to +7.0V
–0.5V to +7.0V
–30mA to +5.0mA
–0.5V to VCC
–0.5V to 5.5V
twice the rated IOL (mA)
4000V
Note:
3. Either voltage limit or current limit is sufficient to protect inputs.
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to absolute maximum ratings.
Symbol
TA
VCC
Parameter
Free Air Ambient Temperature
Supply Voltage
Rating
0°C to +70°C
+4.5V to +5.5V
©1988 Fairchild Semiconductor Corporation
74F240, 74F244 Rev. 1.4
3
www.fairchildsemi.com
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