N74F1245D [NXP]
Octal transceiver 3-State; 八路收发器三态
| 型号： | N74F1245D |
| 厂家： | 
NXP |
| 描述： | Octal transceiver 3-State |
| 文件： | 总10页 (文件大小：88K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
74F1245
Octal transceiver (3-State)
Product specification
IC15 Data Handbook
1995 Mar 01
Philip s Se m ic ond uc tors
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
FEATURES
• Same function and pinout as 74F245
DESCRIPTION
The 74F1245 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 up to
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.
• High impedance NPN base inputs for reduced loading (70µA in
Low and High states)
• Useful in applications where light loading bus loading or direct
interface with output of a MOS microprocessor is desired
• Octal bidirectional bus interface
• Glitch free during 3-State power up and power down
• 3-State buffer outputs sink 64mA and source 15mA
ORDERING INFORMATION
COMMERCIAL RANGE
DRAWING
NUMBER
V
CC
= 5V ±10%,
= 0°C to +70°C
DESCRIPTION
TYPICAL
PROPAGATION
DELAY
T
TYPICAL SUPPLY
CURRENT (TOTAL)
amb
TYPE
20-Pin Plastic DIP
20-Pin Plastic SOL
N74F1245N
N74F1245D
SOT146-1
SOT163-1
74F1245
5.0ns
115mA
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
A0–A7, B0–B7
OE
DESCRIPTION
74F (U.L.) HIGH/LOW
3.5/0.117
LOAD VALUE HIGH/LOW
70µA/70µA
A and B port inputs
Output Enable input (active Low)
Transmit/Receive input
A port outputs
2.0/0.033
40µA/20µA
T/R
2.0/0.033
40µA/20µA
A0–A7
150/40
3.0mA/24mA
15mA/64mA
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.
PIN CONFIGURATION
LOGIC SYMBOL
1
2
20
19
18
17
16
15
14
13
12
11
V
CC
T/R
A0
2
3
4
5
6
7
8
9
OE
B0
B1
B2
B3
B4
B5
3
A1
4
A2
A0 A1
A2 A3
A4 A5
A6 A7
5
A3
19
1
OE
6
A4
T/R
7
A5
B0 B1
B2
16
B3
B4 B5
B6 B7
8
A6
9
A7
B6
B7
10
GND
18
17
15 14
13
12
11
SF00198
V
= Pin 20
CC
GND = Pin 10
SF00199
2
1995 Mar 01
853-0885 14921
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
LOGIC SYMBOL (IEEE/IEC)
FUNCTION TABLE
INPUTS
INPUTS/OUTPUTS
19
G3
OE
L
T/R
An
A = B
INPUTS
Z
Bn
INPUTS
B = A
Z
3EN1 (BA)
L
H
X
1
3EN2 (AB)
L
1
H
2
18
17
16
15
14
13
12
11
2
H = High voltage level
L = Low voltage level
X = Don’t care
3
4
5
6
7
8
9
Z = High impedance “off” state
SF00649
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
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
48
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
128
T
amb
Operating free-air temperature range
Storage temperature range
0 to +70
T
stg
–65 to +150
3
1995 Mar 01
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
RECOMMENDED OPERATING CONDITIONS
LIMITS
NOM
5.0
SYMBOL
PARAMETER
UNIT
MIN
4.5
MAX
V
Supply voltage
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
–15
24
I
64
T
amb
Operating free-air temperature range
0
70
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
LIMITS
NO TAG
SYMBOL
PARAMETER
TEST CONDITIONS
UNIT
TYP
MIN
MAX
NO TAG
±10% V
2.4
2.7
2.0
2.0
V
V
CC
A0–A7, B0–B7
B0–B7
I
I
I
= –3mA
= –15mA
= 24mA
OH
OH
OL
V
V
V
= MIN,
= MAX,
= MIN
CC
IL
±5% V
3.3
CC
V
OH
High-level output voltage
±10% V
V
CC
IH
±5% V
V
CC
±10% V
0.35
0.35
0.30
0.42
–0.73
0.50
0.50
0.55
0.55
–1.2
100
100
40
V
CC
A0–A7
V
V
V
= MIN,
= MAX,
= MIN
CC
±5% V
V
CC
V
Low-level output voltage
Input clamp voltage
OL
IL
I
I
= 48mA
= 64mA
±10% V
V
OL
CC
IH
B0–B7
±5% V
V
OL
CC
V
IK
V
CC
V
CC
V
CC
V
CC
V
CC
= MIN, I = I
IK
V
I
OE, T/R
= 0.0V, V = 7.0V
µA
µA
µA
µA
I
Input current at maximum
input voltage
I
I
A0–A7, B0–B7
OE, T/R only
OE, T/R only
= 0.0V, V = 5.5V
I
I
I
High-level input current
Low-level input current
= MAX, V = 2.7V
I
IH
= MAX, V = 0.5V
–20
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
–70
O
A0–A7
B0–B7
–60
–150
–225
155
mA
mA
mA
mA
mA
Short-circuit output
current
I
V
= MAX
= MAX
OS
CC
CC
CC
NO TAG
–100
I
I
I
120
116
110
CCH
CCL
CCZ
I
Supply current (total)
V
150
165
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at V = 5V, T = 25°C.
CC
amb
3. 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
4
1995 Mar 01
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
AC ELECTRICAL CHARACTERISTICS
LIMITS
V
= +5.0V
= +25°C
= +5.0V ± 10%
= 0°C to +70°C
CC
CC
TEST
CONDITION
T
amb
SYMBOL
PARAMETER
UNIT
C = 50pF, R = 500Ω
L
L
MIN
TYP
MAX
MIN
MAX
t
t
Propagation delay
An to Bn, Bn to An
Waveform
NO TAG
2.0
2.5
4.0
5.0
6.5
7.5
1.5
2.0
7.0
8.0
PLH
PHL
ns
ns
Waveform
NO TAG
Waveform
NO TAG
t
t
Output Enable time
OE to An or Bn
3.0
4.0
6.0
7.5
8.0
10.0
2.5
3.5
9.0
11.0
PZH
PZL
Waveform
NO TAG
Waveform
NO TAG
t
t
Output Disable time
OE to An or Bn
2.0
4.0
5.0
7.0
8.0
10.0
1.5
4.0
9.0
11.0
PHZ
PLZ
ns
AC WAVEFORMS
For all waveforms, V = 1.5V.
M
OE
An, Bn
V
V
M
t
M
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
5
1995 Mar 01
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
TEST CIRCUIT AND WAVEFORMS
V
CC
t
w
AMP (V)
90%
7.0V
90%
NEGATIVE
PULSE
V
V
M
R
M
L
V
V
OUT
IN
10%
10%
PULSE
GENERATOR
D.U.T.
0V
t
t )
t
t )
THL ( f
TLH ( r
R
C
R
L
T
L
t
t )
t
t )
TLH ( r
THL ( f
AMP (V)
90%
M
90%
POSITIVE
PULSE
V
V
M
Test Circuit for Open Collector Outputs
10%
10%
0V
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;
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.
INPUT PULSE REQUIREMENTS
family
V
M
rep. rate
t
w
t
t
amplitude
TLH
THL
of
OUT
2.5ns
2.5ns
74F
3.0V
1.5V
1MHz
500ns
SF00128
6
1995 Mar 01
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
DIP20: plastic dual in-line package; 20 leads (300 mil)
SOT146-1
7
1995 Mar 01
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
8
1995 Mar 01
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
NOTES
9
1995 Mar 01
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F1245
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
Preproduction Product
Full Production
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
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 1995
All rights reserved. Printed in U.S.A.
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