CBT3245PW [NXP]
Octal bus switch with output enable; 与输出使能八路总线开关
| 型号： | CBT3245PW |
| 厂家： | 
NXP |
| 描述： | Octal bus switch with output enable |
| 文件： | 总10页 (文件大小：85K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
CBT3245
Octal bus switch with output enable
Preliminary specification
1998 Dec 08
Philips
Semiconductors
Philips Semiconductors
Preliminary specification
Octal bus switch with output enable
CBT3245
FEATURES
DESCRIPTION
The CBT3245 provides eight bits of high-speed TTL-compatible bus
switching in a standard ’245 device pinout. The low on-state
resistance of the switch allows connections to be made with minimal
propagation delay.
• Functionally equivalent to QS3245
• Standard ’245-type pinout
• 5Ω switch connection between two ports
• TTL compatible control input levels
The CBT3245 device is organized as one 8-bit switch. When enable
(OE) is low, the switch is on and port A is connected to port B.
When OE is high, the switch is open and a high-impedance state
exists between the two ports.
• Package options include plastic small outline (D), shrink small
outline (DB), thin shrink small outline (TSSOP)
The CBT3245 is characterized for operation from –40°C to 85°C.
QUICK REFERENCE DATA
CONDITIONS
= 25°C; GND = 0V
SYMBOL
PARAMETER
TYPICAL
UNIT
T
amb
t
t
Propagation delay
An to Yn
PLH
PHL
C = 50pF; V = 5V
ns
L
CC
C
Pin capacitance (OFF state)
Total supply current
V
= 3V or 0V
6
pF
IO(OFF)
O
I
Outputs disabled; V =5.5V
µA
CCZ
CC
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE OUTSIDE NORTH AMERICA
NORTH AMERICA
CBT3245 D
DWG NUMBER
SOT163-1
20-Pin plastic SO
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
CBT3245 D
CBT3245 DB
CBT3245 PW
20-Pin Plastic SSOP Type II
20-Pin Plastic TSSOP Type I
CBT3245 DB
SOT339-1
CBT3245PW DH
SOT360-1
PIN CONFIGURATION
PIN DESCRIPTION
PIN NUMBER
SYMBOL
NC
NAME AND FUNCTION
No internal connection
Output enable input
1
19
20
NC
A1
A2
A3
A4
A5
A6
A7
A8
1
2
3
4
5
6
7
8
9
V
CC
OE
19 OE
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
2, 3, 4, 5, 6, 7, 8, 9
A1–A8
18, 17, 16, 15, 14,
13, 12, 11
B1–B8
GND
10
20
Ground (0V)
V
CC
Positive supply voltage
GND 10
11
B8
SA00507
2
1998 Dec 08
Philips Semiconductors
Preliminary specification
Octal bus switch with output enable
CBT3245
LOGIC SYMBOL
FUNCTION TABLE
INPUT
INPUTS/OUTPUTS
2
9
18
11
OE
L
A, B
A = B
Z
A1
A8
B1
B8
H
H
L
Z
=
=
=
High voltage level
Low voltage level
High impedance “off” state
19
OE
SA00508
1, 2
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
DC supply voltage
CONDITIONS
RATING
UNIT
V
V
CC
I
IK
–0.5 to +7.0
–50
DC input diode current
V < 0
I
mA
V
3
V
I
DC input voltage
–0.5 to +7.0
–50
I
DC output diode current
V
O
< 0
mA
V
OK
3
V
DC output voltage
output in Off or High state
output in Low state
–0.5 to +7
128
OUT
OUT
I
DC output current
mA
°C
T
stg
Storage temperature range
–65 to 150
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 voltage ratings may be exceeded if the input and output current ratings are observed.
RECOMMENDED OPERATING CONDITIONS
LIMITS
SYMBOL
PARAMETER
UNIT
Min
4.0
2.0
Max
V
CC
DC supply voltage
5.5
V
V
V
IH
High-level input voltage
Low-level Input voltage
V
IL
0.8
V
T
amb
Operating free-air temperature range
–40
+85
°C
3
1998 Dec 08
Philips Semiconductors
Preliminary specification
Octal bus switch with output enable
CBT3245
DC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
T
amb
= –40°C to +85°C
UNIT
1
Min
Typ
Max
V
IK
Input clamp voltage
V
CC
= 4.5V; I = –18mA
–1.2
V
I
I
Input leakage current
V
V
= 5.5V; V = GND or 5.5V
±5
µA
µA
I
CC
I
2
I
Quiescent supply current
= 5.5V; I = 0, V = V or GND
50
CC
CC
O
I
CC
Additional supply current per
input pin
V
CC
V
CC
= 5.5V, one input at 3.4V, other inputs at
or GND
∆I
CC
3.5
mA
2
C
Control pins
V = 3V or 0, OE = V
CC
3
6
pF
pF
I
I
C
Power-off leakage current
V
V
V
V
= 3V or 0
IO(OFF)
O
= 4.5V; V = 0V; I = 64mA
5
7
7
CC
CC
CC
1
I
3
r
On-resistance
= 4.5V; V = 0V; I = 30mA
5
Ω
on
1
I
= 4.5V; V = 2.4V; I = 15mA
10
15
1
I
NOTES:
1. All typical values are at V = 5V, TA = 25 C
CC
2. This is the increase in supply current for each input that is at the specified TTL voltage level rather than V or GND
CC
3. Measured by the voltage drop between the A and the B terminals at the indicated current through the switch.
On-state resistance is determined by the lowest voltage of the two (A or B) terminals.
AC CHARACTERISTICS
GND = 0V; t C = 50pF
R;
L
74CBT3245
FROM
(INPUT)
TO
(OUTPUT)
T
= –40°C to +85°C
amb
V
SYMBOL
PARAMETER
UNIT
= +5.0V ±0.5V
CC
Min
Max
1
t
t
Propagation delay
A or B
OE
B or A
A or B
.25
ns
ns
pd
Output enable time
to High and Low level
en
Output disable time
from High and Low level
t
dis
OE
A or B
ns
NOTES:
1. This parameter is warranted but not production tested. The propagation delay is based on the RC time constant of the typical on-state
resistance of the switch and a load capacitance of 50 pF, when driven by an ideal voltage source (zero output impedance).
4
1998 Dec 08
Philips Semiconductors
Preliminary specification
Octal bus switch with output enable
CBT3245
AC WAVEFORMS
V
M
= 1.5V, V = GND to 3.0V
IN
3 V
3V
Output Control
(Low-level
enabling
1.5V
1.5V
t
1.5 V
1.5 V
INPUT
0 V
V
0V
t
t
t
PLZ
PZL
PLH
PHL
3.5V
Output
Waveform 1
S1 at 7 V
OH
1.5 V
1.5 V
V
V
+ 0.3V
– 0.3V
OL
1.5V
1.5V
(see Note)
V
V
OL
OUTPUT
t
t
PHZ
PZH
V
OL
OH
Output
Waveform 2
S1 at Open
(see Note)
OH
SA00028
Waveform 1. Input to Output Propagation Delays
0V
Note:
Waveform 1 is for an output with internal conditions such that
the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that
the output is high except when disabled by the output control.
SA00029
Waveform 2. 3-State Output Enable and Disable Times
TEST CIRCUIT AND WAVEFORMS
7 V
500 Ω
S1
From Output
Under Test
Open
GND
500 Ω
C
= 50 pF
L
Load Circuit
TEST
S1
t
open
7 V
pd
t
/t
PLZ PZL
t
/t
open
PHZ PZH
DEFINITIONS
C
=
Load capacitance includes jig and probe capacitance;
see AC CHARACTERISTICS for value.
L
SA00012
NOTES:
1. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Z = 50 Ω, t ≤ 2.5 ns, t ≤ 2.5 ns.
O
r
f
2. The outputs are measured one at a time with one transition per measurement.
5
1998 Dec 08
Philips Semiconductors
Preliminary specification
Octal bus switch with output enable
CBT3245
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
6
1998 Dec 08
Philips Semiconductors
Preliminary specification
Octal bus switch with output enable
CBT3245
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
SOT339-1
7
1998 Dec 08
Philips Semiconductors
Preliminary specification
Octal bus switch with output enable
CBT3245
TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm
SOT360-1
8
1998 Dec 08
Philips Semiconductors
Preliminary specification
Octal bus switch with output enable
CBT3245
NOTES
9
1998 Dec 08
Philips Semiconductors
Preliminary specification
Octal bus switch with output enable
CBT3245
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
9397-750-04607
Document order number:
Philips
Semiconductors
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