74F245 [NXP]
Octal transceiver 3-State; 八路收发器三态
| 型号： | 74F245 |
| 厂家： | 
NXP |
| 描述： | Octal transceiver 3-State |
| 文件： | 总10页 (文件大小：95K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
74F245
Octal transceiver (3-State)
Product specification
IC15 Data Handbook
1994 Nov 15
Philip s Se m ic ond uc tors
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
FEATURES
PIN CONFIGURATION
• Octal bidirectional bus interface
• 3-State buffer outputs sink 64mA
• 15mA source current
1
2
20
19
18
17
16
15
14
13
12
11
V
CC
T/R
A0
OE
B0
B1
B2
B3
B4
B5
3
A1
4
A2
• Outputs are placed in high impedance state during power-off
conditions
5
A3
6
A4
DESCRIPTION
7
A5
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.
8
A6
9
A7
B6
B7
10
GND
SF00198
TYPE
TYPICAL PROPAGATION DELAY
TYPICAL SUPPLY CURRENT (TOTAL)
74F245
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 SO
N74F245N
N74F245D
N74F245DB
SOT146-1
SOT163-1
SOT339-1
20-Pin Plastic SSOP Type II
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
A0–A7, B0–B7
OE
DESCRIPTION
74F (U.L.) HIGH/LOW
3.5/1.0
LOAD VALUE HIGH/LOW
70µA/0.6mA
Data inputs
Output Enable input (active Low)
Transmit/Receive input
A port outputs
1.0/2.0
20µA/1.2mA
T/R
1.0/2.0
20µA/1.2mA
A0–A7
150/40
3.0mA/24mA
B0–B7
B port outputs
750/106.7
15mA/64mA
NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.
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
2
19
1
OE
17
16
15
14
13
12
11
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
2
November 15, 1994
853–0025 14256
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
LOGIC DIAGRAM
A0
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
19
1
OE
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
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
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
–15
24
I
64
T
amb
Operating free-air temperature range
0
+70
3
November 15, 1994
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
LIMITS
1
SYMBOL
PARAMETER
TEST CONDITIONS
UNIT
2
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
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
= –15mA
OH
±5% V
CC
I
OL
I
OL
I
OL
= 20mA
= 24mA
= MAX
±10% V
±5% V
0.30
0.35
0.50
0.50
0.55
CC
V
V
V
= MIN,
= MAX,
= MIN
CC
IL
A0–A7
B0–B7
V
OL
Low-level output voltage
CC
IH
±10% V
CC
V
V
V
= MIN,
= MAX,
= MIN
CC
IL
V
Low-level output voltage
Input clamp voltage
B0–B7
I
OL
= MAX
±5% V
0.42
0.55
V
OL
CC
IH
V
IK
V
CC
V
CC
V
CC
V
CC
V
CC
= MIN, I = I
IK
–0.73
–1.2
100
1
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
–150
–225
87
mA
mA
mA
mA
mA
3
I
Short-circuit output current
V
= MAX
= MAX
OS
CC
CC
CC
–100
I
I
I
60
70
75
CCH
CCL
CCZ
100
110
I
Supply current (total)
V
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
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
6.0
6.0
2.5
2.5
7.0
7.0
PLH
PHL
Waveform 1
ns
ns
ns
t
t
Output Enable time
to High or Low level
Waveform 2
Waveform 3
2.0
3.5
4.5
5.5
7.0
8.0
2.0
3.5
8.0
9.0
PZH
PZL
t
t
Output Disable time
from High or Low level
Waveform 2
Waveform 3
2.5
1.0
5.0
3.5
6.5
6.0
2.0
1.0
7.5
7.0
PHZ
PLZ
4
November 15, 1994
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
AC WAVEFORMS
For all waveforms, V = 1.5V.
M
An, Bn
V
M
V
M
t
t
PHL
PLH
V
V
M
M
Bn, An
SF00202
Waveform 1. Propagation Delay for Non-Inverting Output
OE
OE
V
V
V
V
M
M
t
M
M
t
t
t
PLZ
PZH
PHZ
PZL
An, Bn
V
–0.3V
OH
V
V
M
M
V
+0.3V
An, Bn
OL
0V
SF00203
SF00204
Waveform 3. 3-State Output Enable Time to Low Level and
Output Disable Time from Low Level
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
5
November 15, 1994
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
DIP20: plastic dual in-line package; 20 leads (300 mil)
SOT146-1
6
1994 Nov 15
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
7
1994 Nov 15
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
NOTES
8
1994 Nov 15
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
SOT339-1
9
1994 Nov 15
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74F245
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 1996
All rights reserved. Printed in U.S.A.
(print code)
Date of release: July 1994
9397-750-05104
Document order number:
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