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74F245 PDF даташит

Спецификация 74F245 изготовлена ​​​​«Philips» и имеет функцию, называемую «Octal transceiver 3-State».

Детали детали

Номер произв 74F245
Описание Octal transceiver 3-State
Производители Philips
логотип Philips логотип 

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74F245 Даташит, Описание, Даташиты
INTEGRATED CIRCUITS
74F245
Octal transceiver (3-State)
Product specification
IC15 Data Handbook
Philips Semiconductors
1994 Nov 15









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74F245 Даташит, Описание, Даташиты
Philips Semiconductors
Octal transceiver (3-State)
Product specification
74F245
FEATURES
Octal bidirectional bus interface
3-State buffer outputs sink 64mA
15mA source current
Outputs are placed in high impedance state during power-off
conditions
DESCRIPTION
The 74F245 is an octal transceiver featuring non-inverting 3-State
bus compatible outputs in both transmit and receive directions. The
B port outputs are capable of sinking 64mA and sourcing 15mA,
producing very good capacitive drive characteristics. The device
features an Output Enable (OE) input for easy cascading and
Transmit/Receive (T/R) input for direction control. The 3-State
outputs, B0–B7, have been designed to prevent output bus loading if
the power is removed from the device.
PIN CONFIGURATION
T/R 1
A0 2
A1 3
A2 4
A3 5
A4 6
A5 7
A6 8
A7 9
GND 10
20 VCC
19 OE
18 B0
17 B1
16 B2
15 B3
14 B4
13 B5
12 B6
11 B7
SF00198
TYPE
74F245
TYPICAL PROPAGATION DELAY
4.0ns
TYPICAL SUPPLY CURRENT (TOTAL)
70mA
ORDERING INFORMATION
DESCRIPTION
20-Pin Plastic DIP
20-Pin Plastic SO
20-Pin Plastic SSOP Type II
COMMERCIAL RANGE
VCC = 5V ±10%, Tamb = 0°C to +70°C
N74F245N
N74F245D
N74F245DB
DRAWING NUMBER
SOT146-1
SOT163-1
SOT339-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74F (U.L.) HIGH/LOW
A0–A7, B0–B7
Data inputs
3.5/1.0
OE Output Enable input (active Low)
1.0/2.0
T/R Transmit/Receive input
1.0/2.0
A0–A7
A port outputs
150/40
B0–B7
B port outputs
750/106.7
NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.
LOAD VALUE HIGH/LOW
70µA/0.6mA
20µA/1.2mA
20µA/1.2mA
3.0mA/24mA
15mA/64mA
LOGIC SYMBOL
234567 89
IEC/IEEE SYMBOL
19 G3
3EN1 (BA)
1 3EN1 (AB)
A0 A1 A2 A3 A4 A5 A6 A7
19 OE
1 T/R
B0 B1 B2 B3 B4 B5 B6 B7
VCC = Pin 20
GND = Pin 10
18 17 16 15 14 13 12 11
SF00199
1
2 2 18
3 17
4 16
5 15
6 14
7 13
8 12
9 11
SF00200
November 15, 1994
2
853–0025 14256









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74F245 Даташит, Описание, Даташиты
Philips Semiconductors
Octal transceiver (3-State)
Product specification
74F245
LOGIC DIAGRAM
A0 A1 A2 A3 A4 A5 A6 A7
23456789
OE 19
1
T/R
VCC = Pin 20
GND = Pin 10
18
B0
17
B1
16
B2
15
B3
14
B4
13
B5
12
B6
11
B7
SF00201
FUNCTION TABLE
INPUTS
OE T/R
LL
LH
HX
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance “off” state
OUTPUTS
Bus B data to Bus A
Bus A data to Bus B
Z
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limits 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
Supply voltage
Input voltage
Input current
Voltage applied to output in High output state
Current applied to output in Low output state
A0–A7
B0–B7
Tamb
Tstg
Operating free-air temperature range
Storage temperature range
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
VCC Supply voltage
VIH High-level input voltage
VIL Low-level input voltage
IIK Input clamp current
IOH High-level output current
IOL
Tamb
Low-level output current
Operating free-air temperature range
A0–A7
B0–B7
A0–A7
B0–B7
MIN
4.5
2.0
0
RATING
–0.5 to +7.0
–0.5 to +7.0
–30 to +5
–0.5 to +5.5
48
128
0 to +70
–65 to +150
LIMITS
NOM
5.0
MAX
5.5
0.8
–18
–3
–15
24
64
+70
UNIT
V
V
mA
V
mA
mA
°C
°C
UNIT
V
V
V
mA
mA
mA
mA
mA
°C
November 15, 1994
3










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