N74F2245D PDF даташит
Спецификация N74F2245D изготовлена «Philips» и имеет функцию, называемую «Octal transceiver with 30ohm equivalent output termination 3-State». |
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Детали детали
Номер произв | N74F2245D |
Описание | Octal transceiver with 30ohm equivalent output termination 3-State |
Производители | Philips |
логотип |
10 Pages
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INTEGRATED CIRCUITS
74F2245
Octal transceiver with 30W equivalent
output termination (3-State)
Product specification
IC15 Data Handbook
1996 May 10
Philips
Semiconductors
No Preview Available ! |
Philips Semiconductors
Octal transceiver with 30W equivalent output termination
(3-State)
Product specification
74F2245
FEATURES
• Octal bidirectional bus interface
• 30 Ohm output termination for driving DRAM
• Outputs are placed in high impedance state during power-off
conditions
• SSOP Type II package
DESCRIPTION
The 74F2245 is an octal transceiver featuring non-inverting 3-State
bus compatible outputs in both transmit and receive directions. 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.
The 30 Ohm series termination on the outputs reduces
over/undershoot making them ideal for driving DRAM.
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
74F2245
TYPICAL PROPAGATION DELAY
4.0ns
TYPICAL SUPPLY CURRENT (TOTAL)
70mA
ORDERING INFORMATION
DESCRIPTION
20-Pin Plastic DIP
20-Pin Plastic SOL
20-Pin Plastic SSOP
COMMERCIAL RANGE
VCC = 5V ±10%, Tamb = 0°C to +70°C
N74F2245N
N74F2245D
N74F2245DB
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
150/8
B0-B7
B port outputs
150/8
NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.
* 12mA with reduced noise margin
LOAD VALUE HIGH/LOW
70µA/0.6mA
20µA/1.2mA
20µA/1.2mA
3.0mA/5mA*
3.0mA/5mA*
1996 May 10
2 853-1833 16802
No Preview Available ! |
Philips Semiconductors
Octal transceiver with 30W equivalent output termination
(3-State)
Product specification
74F2245
LOGIC SYMBOL
234567 89
A0 A1 A2 A3 A4 A5 A6 A7
19 OE
1 T/R
B0 B1 B2 B3 B4 B5 B6 B7
18 17 16 15 14 13 12 11
VCC = Pin 20
GND = Pin 10
LOGIC DIAGRAM
SF00199
A0 A1
23
IEC/IEEE SYMBOL
19 G3
3EN1 (BA)
1 3EN1 (AB)
∇1
2 2 ∇ 18
3 17
4 16
5 15
6 14
7 13
8 12
9 11
SF00200
A2 A3 A4 A5 A6 A7
456789
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
1996 May 10
3
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Номер в каталоге | Описание | Производители |
N74F2245D | Octal transceiver with 30ohm equivalent output termination 3-State | Philips |
N74F2245DB | Octal transceiver with 30ohm equivalent output termination 3-State | Philips |
N74F2245N | Octal transceiver with 30ohm equivalent output termination 3-State | Philips |
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