N74F2245N [NXP]
Octal transceiver with 30ohm equivalent output termination 3-State; 八路收发器30ohm相当于输出端接三态
| 型号： | N74F2245N |
| 厂家： | 
NXP |
| 描述： | Octal transceiver with 30ohm equivalent output termination 3-State |
| 文件： | 总10页 (文件大小：105K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
74F2245
Octal transceiver with 30W equivalent
output termination (3-State)
Product specification
IC15 Data Handbook
1996 May 10
Philips
Semiconductors
Philips Semiconductors
Product specification
Octal transceiver with 30W equivalent output termination
(3-State)
74F2245
FEATURES
PIN CONFIGURATION
• Octal bidirectional bus interface
• 30 Ohm output termination for driving DRAM
1
2
20
19
18
17
16
15
14
13
12
11
V
CC
T/R
A0
OE
B0
B1
B2
B3
B4
B5
• Outputs are placed in high impedance state during power-off
3
A1
conditions
4
A2
• SSOP Type II package
5
A3
6
A4
DESCRIPTION
7
A5
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.
8
A6
9
A7
B6
B7
10
GND
SF00198
The 30 Ohm series termination on the outputs reduces
over/undershoot making them ideal for driving DRAM.
TYPE
TYPICAL PROPAGATION DELAY
TYPICAL SUPPLY CURRENT (TOTAL)
74F2245
4.0ns
70mA
ORDERING INFORMATION
COMMERCIAL RANGE
= 5V ±10%, T = 0°C to +70°C
DESCRIPTION
DRAWING NUMBER
V
CC
amb
20-Pin Plastic DIP
20-Pin Plastic SOL
20-Pin Plastic SSOP
N74F2245N
N74F2245D
N74F2245DB
SOT146-1
SOT163-1
SOT339-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
A0-A7, B0-B7
OE
DESCRIPTION
74F (U.L.) HIGH/LOW
LOAD VALUE HIGH/LOW
70µA/0.6mA
Data inputs
3.5/1.0
1.0/2.0
1.0/2.0
150/8
Output Enable input (active Low)
Transmit/Receive input
A port outputs
20µA/1.2mA
T/R
20µA/1.2mA
A0-A7
3.0mA/5mA*
B0-B7
B port outputs
150/8
3.0mA/5mA*
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
*
2
1996 May 10
853-1833 16802
Philips Semiconductors
Product specification
Octal transceiver with 30W equivalent output termination
(3-State)
74F2245
LOGIC SYMBOL
IEC/IEEE SYMBOL
19
G3
3EN1 (BA)
3EN1 (AB)
2
3
4
5
6
7
8
9
1
1
A0 A1
A2 A3
A4 A5
A6 A7
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
2
19
1
OE
T/R
B0 B1
B2
16
B3
B4 B5
B6 B7
18
17
15 14
13
12
11
V
= Pin 20
CC
GND = Pin 10
SF00200
SF00199
LOGIC DIAGRAM
A0
A1
A2
A3
A4
A5
A6
A7
2
3
4
5
6
7
8
9
19
OE
1
T/R
18
B0
17
B1
16
B2
15
B3
14
B4
13
B5
12
B6
11
B7
V
= Pin 20
CC
GND = Pin 10
SF00201
FUNCTION TABLE
INPUTS
OUTPUTS
OE
L
T/R
L
H
X
Bus B data to Bus A
Bus A data to Bus B
Z
L
H
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance “off” state
3
1996 May 10
Philips Semiconductors
Product specification
Octal transceiver with 30W equivalent output termination
(3-State)
74F2245
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
RATING
–0.5 to +7.0
–0.5 to +7.0
–30 to +5
–0.5 to +5.5
24
UNIT
V
V
Supply voltage
Input voltage
Input current
CC
IN
V
V
I
mA
V
IN
V
OUT
Voltage applied to output in High output state
A0-A7
B0-B7
mA
mA
°C
°C
I
Current applied to output in Low output state
OUT
24
T
amb
Operating free-air temperature range
Storage temperature range
0 to +70
–65 to +150
T
stg
RECOMMENDED OPERATING CONDITIONS
LIMITS
SYMBOL
PARAMETER
UNIT
MIN
4.5
NOM
MAX
V
Supply voltage
5.0
5.5
V
CC
IH
IL
V
V
High-level input voltage
Low-level input voltage
Input clamp current
2.0
V
0.8
–18
–3
V
I
mA
mA
mA
mA
mA
°C
IK
A0-A7
B0-B7
A0-A7
B0-B7
I
High-level output current
Low-level output current
OH
OL
–3*
5*
I
5*
T Operating free-air temperature range
amb
12 mA with reduced noise margin
0
+70
*
4
1996 May 10
Philips Semiconductors
Product specification
Octal transceiver with 30W equivalent output termination
(3-State)
74F2245
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
LIMITS
2
SYMBOL
PARAMETER
TEST CONDITIONS
UNIT
1
MIN
2.4
2.7
2.0
2.0
TYP
MAX
±10% V
V
V
V
V
V
V
V
CC
A0-A7, B0-B7
A0-A7, B0-B7
A0-A7, B0-B7
A0-A7, B0-B7
I
I
= –3mA
OH
V
V
V
= MIN,
= MAX,
= MIN
CC
IL
±5% V
3.4
CC
V
OH
High-level output voltage
±10% V
CC
IH
= –12mA
OH
±5% V
CC
I
I
= 5mA
= 5mA
±10% V
0.42
0.42
0.55
0.55
–0.73
0.50
0.50
0.67
0.67
–1.2
100
1
OL
CC
V
V
V
= MIN,
= MAX,
= MIN
CC
IL
±5% V
OL
CC
V
OL
Low-level output voltage
Input clamp voltage
±10% V
CC
IH
I
OL
= 12mA
±5% V
CC
V
IK
V
CC
V
CC
V
CC
V
CC
V
CC
= MIN, I = I
IK
V
I
OE, T/R
= 5.5V, V = 7.0V
µA
mA
µA
mA
I
Input current at maximum
input voltage
I
I
A0-A7, B0-B7
OE, T/R only
OE, T/R only
= 5.5V, V = 5.5V
I
I
I
High-level input current
Low-level input current
= MAX, V = 2.7V
20
IH
I
= MAX, V = 0.5V
–1.2
IL
I
Off-state output current
High level voltage applied
I
+I
V
= MAX, V = 2.7V
70
µA
µA
IH OZH
CC
CC
O
Off-state output current
Low level voltage applied
I +I
IL OZL
V
= MAX, V = 0.5V
–600
O
A0-A7
B0-B7
–60
–60
–150
–150
87
mA
mA
mA
mA
mA
3
I
I
Short-circuit output current
V
V
= MAX
= MAX
OS
CC
I
I
I
60
70
75
CCH
CCL
CCZ
100
110
Supply current (total)
CC
CC
NOTES:
1
2
3
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
All typical values are at V = 5V, T = 25°C.
CC
amb
Not more than one output should be shorted at a time. For testing I , the use of high-speed test apparatus and/or sample-and-hold
OS
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, I tests should be performed last.
OS
AC ELECTRICAL CHARACTERISTICS
LIMITS
V
= +5.0V
= +25°C
V
= +5.0V ± 10%
= 0°C to +70°C
CC
CC
TEST
CONDITION
T
amb
T
amb
SYMBOL
PARAMETER
UNIT
C = 50pF, R = 500Ω
C = 50pF, R = 500Ω
L L
L
L
MIN
TYP
MAX
MIN
MAX
t
t
Propagation delay
An to Bn, Bn to An
2.5
2.5
3.5
4.0
7.0
7.0
2.5
2.5
8.5
8.0
PLH
PHL
Waveform 1
ns
ns
ns
t
t
Output Enable time
to High or Low level
Waveform 2
Waveform 3
2.5
3.5
4.5
5.5
8.0
8.5
2.0
3.5
9.5
9.5
PZH
PZL
t
t
Output Disable time
from High or Low level
Waveform 2
Waveform 3
2.5
1.5
5.0
3.5
7.0
6.5
2.0
1.0
7.5
7.0
PHZ
PLZ
5
1996 May 10
Philips Semiconductors
Product specification
Octal transceiver with 30W equivalent output termination
(3-State)
74F2245
AC WAVEFORMS
For all waveforms, V = 1.5V.
M
OE
An, Bn
V
V
M
M
t
V
M
V
M
t
PZL
PLZ
t
t
PHL
PLH
An, Bn
V
M
V
V
M
M
V
+0.3V
Bn, An
OL
SF00204
SF00202
Waveform 1. Propagation Delay for Non-Inverting Output
Waveform 3. 3-State Output Enable Time to Low Level and
Output Disable Time from Low Level
OE
V
V
M
M
t
t
PZH
PHZ
V
–0.3V
OH
V
M
An, Bn
0V
SF00203
Waveform 2. 3-State Output Enable Time to High Level and
Output Disable Time from High Level
TEST CIRCUIT AND WAVEFORMS
V
CC
t
w
AMP (V)
0V
7.0V
90%
90%
NEGATIVE
PULSE
V
V
M
R
L
M
V
V
OUT
IN
10%
10%
PULSE
GENERATOR
D.U.T.
t
t )
t
t )
THL ( f
TLH ( r
R
C
R
L
T
L
t
t )
t
t )
TLH ( r
THL ( f
AMP (V)
0V
90%
M
90%
POSITIVE
PULSE
V
V
M
Test Circuit for Open Collector Outputs
10%
10%
t
w
SWITCH POSITION
TEST
SWITCH
closed
closed
open
Input Pulse Definition
t
t
PLZ
PZL
All other
DEFINITIONS:
R
L
C
L
R
T
=
=
=
Load resistor;
INPUT PULSE REQUIREMENTS
see AC electrical characteristics for value.
Load capacitance includes jig and probe capacitance;
see AC electrical characteristics for value.
Termination resistance should be equal to Z
pulse generators.
family
V
M
rep. rate
t
w
t
t
THL
amplitude
TLH
of
OUT
2.5ns
2.5ns
74F
3.0V
1.5V
1MHz
500ns
SF00128
6
1996 May 10
Philips Semiconductors
Product specification
Octal transceiver with 30W equivalent output
termination (3-State)
74F2245
DIP20: plastic dual in-line package; 20 leads (300 mil)
SOT146-1
7
1996 May 10
Philips Semiconductors
Product specification
Octal transceiver with 30W equivalent output
termination (3-State)
74F2245
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
8
1996 May 10
Philips Semiconductors
Product specification
Octal transceiver with 30W equivalent output
termination (3-State)
74F2245
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
SOT339-1
9
1996 May 10
Philips Semiconductors
Product specification
Octal transceiver with 30W equivalent output
termination (3-State)
74F2245
DEFINITIONS
Data Sheet Identification
Product Status
Definition
This data sheet contains the design target or goal specifications for product development. Specifications
may change in any manner without notice.
Objective Specification
Formative or in Design
This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips
Semiconductors reserves the right to make changes at any time without notice in order to improve design
and supply the best possible product.
Preliminary Specification
Product Specification
Preproduction Product
Full Production
This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes
at any time without notice, in order to improve design and supply the best possible product.
Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products,
including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips
Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright,
or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask
work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes
only. PhilipsSemiconductorsmakesnorepresentationorwarrantythatsuchapplicationswillbesuitableforthespecifiedusewithoutfurthertesting
or modification.
LIFE SUPPORT APPLICATIONS
Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices,
orsystemswheremalfunctionofaPhilipsSemiconductorsandPhilipsElectronicsNorthAmericaCorporationProductcanreasonablybeexpected
to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips
Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully
indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
Philips Semiconductors and Philips Electronics North America Corporation
register eligible circuits under the Semiconductor Chip Protection Act.
Copyright Philips Electronics North America Corporation 1996
All rights reserved. Printed in U.S.A.
(print code)
Date of release: July 1994
9397-750-05199
Document order number:
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