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N74F1244N PDF даташит

Спецификация N74F1244N изготовлена ​​​​«Philips» и имеет функцию, называемую «Octal buffer 3-State».

Детали детали

Номер произв N74F1244N
Описание Octal buffer 3-State
Производители Philips
логотип Philips логотип 

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N74F1244N Даташит, Описание, Даташиты
INTEGRATED CIRCUITS
74F1244
Octal buffer (3-State)
Product specification
IC15 Data Handbook
Philips
Semiconductors
1989 Apr 04









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N74F1244N Даташит, Описание, Даташиты
Philips Semiconductors
Octal buffer (3-State)
Product specification
74F1244
FEATURES
High impedance NPN base inputs for reduced loading
(20µA in High and Low states)
Low power, light loading
Functional pin-for-pin equivalent of 74F244
1/30th the bus loading of 74F244
Provides ideal interface and increase fan-out of MOS
microprocessors
Octal bus interface
3-State buffer outputs sink 64mA and source 15mA
DESCRIPTION
The 74F1244 is an octal buffer that is ideal for driving bus lines or
buffer memory address registers. The outputs are capable of sinking
64mA and sourcing up to 15mA, producing very good capacitive
drive characteristics. The device features two Output Enables, OEa
and OEb, each controlling four of the 3-State outputs.
The 74F1244 is pin and functionally compatible with the 74F244.
The lower power and light bus loading features make it an ideal part
to interface directly with MOS microprocessors.
PIN CONFIGURATION
OEa 1
Ia0 2
Yb0 3
Ia1 4
Yb1 5
Ia2 6
Yb2 7
Ia3 8
Yb3 9
GND 10
20 VCC
19 OEb
18 Ya0
17 Ib0
16 Ya1
15 Ib1
14 Ya2
13 Ib2
12 Ya3
11 Ib3
SF00227
TYPE
74F1244
TYPICAL
PROPAGATION
DELAY
4.5ns
TYPICAL SUPPLY
CURRENT (TOTAL)
43mA
ORDERING INFORMATION
DESCRIPTION
20-pin plastic DIP
COMMERCIAL RANGE
VCC = 5V ±10%,
Tamb = 0°C to +70°C
N74F1244N
20-pin plastic SOL
N74F1244D
DRAWING
NUMBER
SOT146-1
SOT163-1
INPUT AND OUTPUT LOADING AND FAN OUT TABLE
PINS
DESCRIPTION
Ian, Ibn
Data inputs
OEa, OEb
Output enable inputs (active Low)
Yan, Ybn
Data outputs
NOTE: One (1.0) FAST unit load is defined as: 20µA in the high state and 0.6mA in the low state.
74F (U.L.)
HIGH/LOW
1.0/0.033
1.0/0.033
750/106.7
LOGIC SYMBOL
IEC/IEEE SYMBOL
2 4 6 8 17 15 13 11
Ia0 Ia1 Ia2 Ia3 Ib0 Ib1 Ib2 Ib3
1 OEa
19 OEb
Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
VCC = Pin 20
GND = Pin 10
18 16 14 12 3 5 7 9
SF00228
1
EN1
19
EN2
2
1
4
6
8
17
2
15
13
11
LOAD VALUE
HIGH/LOW
20µA/20µA
20µA/20µA
15mA/64mA
18
16
14
12
3
5
7
9
SF01366
1989 Apr 04
2 853–0041 96221









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N74F1244N Даташит, Описание, Даташиты
Philips Semiconductors
Octal buffer (3-State)
Product specification
74F1244
LOGIC DIAGRAM
Ia0 2
Ia1 4
Ia2 6
Ia3 8
OEa 1
VCC = Pin 20
GND = Pin 10
18 Ya0
Ib0 17
16 Ya1
Ib1 15
14 Ya2
Ib2 13
12 Ya3
Ib3 11
OEb 19
3 Yb0
5 Yb1
7 Yb2
9 Yb3
SF00230
FUNCTION TABLE
INPUTS
OEa Ia OEb
LLL
LHL
HXH
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance “off” state
Ib
L
H
X
OUTPUTS
Ya Yb
LL
HH
ZZ
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free-air temperature range.)
SYMBOL
PARAMETER
VCC
VIN
IIN
VOUT
IOUT
Tamb
Tstg
Supply voltage
Input voltage
Input current
Voltage applied to output in High output state
Current applied to output in Low output state
Operating free-air temperature range
Storage temperature range
RATING
–0.5 to +7.0
–0.5 to +7.0
–30 to +5
–0.5 to VCC
128
0 to +70
–65 to +150
UNIT
V
V
mA
V
mA
°C
°C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
VCC
VIH
VIL
IIK
IOH
IOL
Tamb
Supply voltage
High-level input voltage
Low-level input voltage
Input clamp current
High-level output current
Low-level output current
Operating free-air temperature range
LIMITS
MIN
NOM
MAX
4.5 5.0 5.5
2.0
0.8
–18
–15
64
0 +70
UNIT
V
V
V
mA
mA
mA
°C
1989 Apr 04
3










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