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74F245 반도체 회로 부품 판매점

Octal transceiver 3-State



Philips 로고
Philips
74F245 데이터시트, 핀배열, 회로
INTEGRATED CIRCUITS
74F245
Octal transceiver (3-State)
Product specification
IC15 Data Handbook
Philips Semiconductors
1994 Nov 15


74F245 데이터시트, 핀배열, 회로
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 transceiver

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