74LVT245BDB [NXP]
3.3V Octal transceiver with direction pin (3-State); 3.3V八路收发器的方向针（ 3国）
| 型号： | 74LVT245BDB |
| 厂家： | 
NXP |
| 描述： | 3.3V Octal transceiver with direction pin (3-State) |
| 文件： | 总10页 (文件大小：107K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
74LVT245B
3.3V Octal transceiver with direction pin
(3-State)
Product specification
IC23 Data Handbook
1999 Mar 19
Philips
Semiconductors
Philips Semiconductors
Product specification
3.3V Octal transceiver with direction pin (3-State)
74LVT245B
FEATURES
• Octal bidirectional bus interface
• 3-State buffers
• Output capability: +64mA/-32mA
• TTL input and output switching levels
• Input and output interface capability to systems at 5V supply
DESCRIPTION
The LVT245B is a high-performance BiCMOS product designed for
operation at 3.3V.
V
CC
This device is an octal transceiver featuring non-inverting 3-State
bus compatible outputs in both send and receive directions. The
control function implementation minimizes external timing
requirements. The device features an Output Enable (OE) input for
easy cascading and a Direction (DIR) input for direction control.
• Bus-hold data inputs eliminate the need for external pull-up
resistors to hold unused inputs
• Live insertion/extraction permitted
• Power-up 3-State
• No bus current loading when output is tied to 5V bus
• Latch-up protection exceeds 500mA per JEDEC Std 17
• ESD protection exceeds 2000V per MIL STD 883 Method 3015
and 200V per Machine Model
QUICK REFERENCE DATA
CONDITIONS
= 25°C; GND = 0V
SYMBOL
PARAMETER
TYPICAL
UNIT
ns
T
amb
t
t
Propagation delay
An to Bn or Bn to An
C = 50pF;
L
PLH
PHL
2.4
4
V
= 3.3V
CC
Input capacitance
DIR, OE
C
V = 0V or 3.0V
pF
IN
I
C
I/O pin capacitance
Total supply current
Outputs disabled; V = 0V or 3.0V
10
pF
I/O
I/O
I
Outputs disabled; V = 3.6V
0.13
mA
CCZ
CC
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
ORDERING INFORMATION
74LVT245B D
DWG NUMBER
SOT163-1
20-Pin Plastic SO
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
20-Pin Plastic SSOP
20-Pin Plastic TSSOP
74LVT245B DB
SOT339-1
74LVT245B PW
SOT360-1
PIN CONFIGURATION
PIN DESCRIPTION
PIN NUMBER
SYMBOL
NAME AND FUNCTION
Direction control input
20
19
18
17
16
15
14
13
12
11
1
V
DIR
CC
1
DIR
2
3
A0
A1
OE
B0
B1
B2
B3
B4
B5
B6
B7
2, 3, 4, 5, 6, 7, 8, 9
A0 – A7
Data inputs/outputs (A side)
18, 17, 16, 15, 14,
13, 12, 11
4
A2
B0 – B7
Data inputs/outputs (B side)
5
A3
Output enable input
(active–Low)
6
19
OE
A4
7
A5
10
20
GND
Ground (0V)
8
A6
V
CC
Positive supply voltage
9
A7
10
GND
SV00014
2
1999 Mar 19
853-2143 21060
Philips Semiconductors
Product specification
3.3V Octal transceiver with direction pin (3-State)
74LVT245B
LOGIC SYMBOL
LOGIC SYMBOL (IEEE/IEC)
1
DIR
19
19
OE
G3
2
3
4
5
6
7
8
9
3 EN1 (BA)
3 EN2 (AB)
A0
A1
A2
A3
A4
A5
A6
A7
18
17
16
15
14
13
12
11
1
2
B0
B1
B2
B3
B4
B5
B6
B7
18
1
2
17
16
15
14
13
12
11
3
4
5
6
7
8
9
SV00016
SV00015
FUNCTION TABLE
INPUTS
INPUTS/OUTPUTS
OEn
L
DIR
An
An= Bn
Inputs
Z
Bn
Inputs
Bn =An
Z
L
H
X
L
H
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance “Off” state
1,2
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
CONDITIONS
RATING
UNIT
V
I
DC supply voltage
–0.5 to +4.6
–50
V
mA
V
CC
IK
DC input diode current
V < 0
I
3
V
DC input voltage
–0.5 to +7.0
–50
I
I
DC output diode current
V
O
< 0
mA
V
OK
3
V
OUT
DC output voltage
Output in Off or High state
Output in Low state
–0.5 to +7.0
128
I
DC output current
mA
OUT
Output in High state
–64
T
stg
Storage temperature range
–65 to +150
°C
NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.
2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C.
3. The input and output negative voltage ratings may be exceeded if the input and output clamp current ratings are observed.
3
1999 Mar 19
Philips Semiconductors
Product specification
3.3V Octal transceiver with direction pin (3-State)
74LVT245B
RECOMMENDED OPERATING CONDITIONS
LIMITS
SYMBOL
PARAMETER
UNIT
MIN
2.7
0
MAX
V
CC
DC supply voltage
Input voltage
3.6
5.5
V
V
V
I
V
High-level input voltage
Input voltage
2.0
V
IH
V
0.8
–32
32
V
IL
I
High-level output current
Low-level output current
mA
OH
I
OL
mA
Low-level output current; current duty cycle ≤ 50%; f ≥ 1kHz
Input transition rise or fall rate; Outputs enabled
Operating free-air temperature range
64
Dt/Dv
10
ns/V
T
amb
–40
+85
°C
DC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
Input clamp voltage
TEST CONDITIONS
Temp = -40°C to +85°C
UNIT
1
MIN
TYP
MAX
V
IK
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= 2.7V; I = –18mA
–0.9
–1.2
V
V
IK
= 2.7 to 3.6V; I = –100µA
V
-0.2
V
CC
-0.1
OH
CC
V
OH
High-level output voltage
= 2.7V; I = –8mA
2.4
2.5
OH
= 3.0V; I = –32mA
2.0
2.2
0.1
0.3
0.25
0.3
0.4
1
OH
= 2.7V; I = 100µA
0.2
0.5
0.4
0.5
0.55
10
OL
= 2.7V; I = 24mA
OL
V
OL
Low-level output voltage
Input leakage current
= 3.0V; I = 16mA
V
OL
= 3.0V; I = 32mA
OL
= 3.0V; I = 64mA
OL
= 0 or 3.6V; V = 5.5V
I
Control pins
= 3.6V; V = V or GND
±0.1
1
±1
I
CC
I
I
= 3.6V; V = 5.5V
20
µA
I
4
= 3.6V; V = V
I/O Data pins
0.1
–1
1
I
CC
= 3.6V; V = 0
-5
I
I
Output off current
= 0V; V or V = 0 to 4.5V
1
±100
µA
µA
OFF
I
O
= 3V; V = 0.8V
75
150
–150
I
5
= 3V; V = 2.0V
–75
I
Bus Hold current A inputs
I
HOLD
= 0V to 3.6V; V = 3.6V
±500
CC
Current into an ouptut in the
I
V
= 5.5V; V = 3.0V
60
15
125
µA
µA
EX
O
CC
High state when V > V
O
CC
Power up/down 3-State
V
CC
≤ 1.2V; V = 0.5V to V ; V = GND or V
;
CC
O
CC
I
I
±100
PU/PD
3
output current
OE/OE = Don’t care
I
I
V
V
V
V
= 3.6V; Outputs High, V = GND or V I 0
CC, O =
0.13
3
0.19
12
CCH
CC
CC
CC
CC
I
I
Quiescent supply current
= 3.6V; Outputs Low, V = GND or V I 0
CC, O =
mA
mA
CCL
I
= 3.6V; Outputs Disabled; V = GND or V
I 0
CC, O =
0.13
0.19
CCZ
I
Additional supply current per
= 3V to 3.6V; One input at V -0.6V,
CC
∆I
0.1
0.2
CC
2
input pin
Other inputs at V or GND
CC
NOTES:
1. All typical values are at V = 3.3V and T
= 25°C.
amb
CC
2. This is the increase in supply current for each input at the specified voltage level other than V or GND
CC
3. This parameter is valid for any V between 0V and 1.2V with a transition time of up to 10msec. From V = 1.2V to V = 3.3V ± 0.3V a
CC
CC
CC
transition time of 100µsec is permitted. This parameter is valid for T
= +25°C only.
amb
4. Unused pins at V or GND.
CC
5. This is the bus hold overdrive current required to force the input to the opposite logic state.
4
1999 Mar 19
Philips Semiconductors
Product specification
3.3V Octal transceiver with direction pin (3-State)
74LVT245B
AC CHARACTERISTICS
GND = 0V; t = t = 2.5ns; C = 50pF; R = 500Ω; T = –40°C to +85°C.
amb
R
F
L
L
LIMITS
= 3.3V +0.3V
SYMBOL
PARAMETER
WAVEFORM
V
CC
V
CC
= 2.7V
UNIT
1
MIN
TYP
MAX
MAX
t
t
Propagation delay
An to Bn or Bn to An
1.2
1.2
2.4
2.4
3.5
3.5
4.0
4.0
PLH
PHL
1
2
2
ns
ns
ns
t
Output enable time
to High and Low level
1.3
1.7
3.3
3.2
5.5
5.5
7.1
6.5
PZH
t
PZL
t
Output disable time
from High and Low Level
2.2
2.2
3.6
3.4
5.9
5.0
6.5
5.1
PHZ
t
PLZ
NOTES:
1. All typical values are at V = 3.3V and T
= 25°C.
amb
CC
AC WAVEFORMS
V
M
= 1.5V, V = GND to 2.7V
IN
2.7V
1.5V
t
OE INPUT
1.5V
t
An or Bn
INPUT
0V
3.0V
V
V
M
M
PLZ
PZL
t
t
PLH
PHL
1.5V
1.5V
An or Bn
OUTPUT
V
V
+ 0.3V
– 0.3V
OL
OL
Bn or An
OUTPUT
V
t
M
t
V
PHZ
M
PZH
V
OH
V
OH
Bn or An
OUTPUT
0V
SV00106
SA00192
Waveform 1. Input (An or Bn) to Output (Bn or An) Propagation
Delays
Waveform 2. 3-State Output Enable and Disable Times
5
1999 Mar 19
Philips Semiconductors
Product specification
3.3V Octal transceiver with direction pin (3-State)
74LVT245B
TEST CIRCUIT AND WAVEFORMS
6.0 V
V
CC
t
W
AMP (V)
90%
Open
90%
GND
NEGATIVE
PULSE
V
V
M
V
V
OUT
M
10%
R
R
IN
L
10%
90%
PULSE
GENERATOR
D.U.T.
0V
t
t
(t
(t
)
t
t
(t
)
R
THL
F
TLH
R
T
C
L
L
)
(t
)
F
TLH
R
THL
AMP (V)
90%
M
Test Circuit for 3-State Outputs
POSITIVE
PULSE
V
V
M
10%
10%
t
W
0V
SWITCH POSITION
V
= 1.5 V
M
TEST
SWITCH
Open
6V
Input Pulse Definition
t
/t
PLH PHL
t
/t
PLZ PZL
t
/t
GND
PHZ PZH
INPUT PULSE REQUIREMENTS
DEFINITIONS
FAMILY
R = Load resistor; see AC CHARACTERISTICS for value.
L
Amplitude
Rep. Rate
t
t
R
t
F
W
C = Load capacitance includes jig and probe capacitance;
L
see AC CHARACTERISTICS for value.
74LVT
2.7 V
500 ns
v10 MHz
v2.5 ns v2.5 ns
R = Termination resistance should be equal to Z
T
of
OUT
pulse generators.
SV00092
6
1999 Mar 19
Philips Semiconductors
Product specification
3.3V Octal transceiver with direction pin (3-State)
74LVT245B
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
7
1999 Mar 19
Philips Semiconductors
Product specification
3.3V Octal transceiver with direction pin (3-State)
74LVT245B
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
SOT339-1
8
1999 Mar 19
Philips Semiconductors
Product specification
3.3V Octal transceiver with direction pin (3-State)
74LVT245B
TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm
SOT360-1
9
1999 Mar 19
Philips Semiconductors
Product specification
3.3V Octal transceiver with direction pin (3-State)
74LVT245B
Data sheet status
[1]
Data sheet
status
Product
status
Definition
Objective
specification
Development
This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.
Preliminary
specification
Qualification
This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make chages at any time without notice in order to
improve design and supply the best possible product.
Product
specification
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.
[1] Please consult the most recently issued datasheet before initiating or completing a design.
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.
Righttomakechanges—PhilipsSemiconductorsreservestherighttomakechanges, withoutnotice, intheproducts, includingcircuits,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.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
Sunnyvale, California 94088–3409
Telephone 800-234-7381
print code
Date of release: 05-96
9397-750-05513
Document order number:
Philips
Semiconductors
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