PHILIPS CBT3245PW

INTEGRATED CIRCUITS
CBT3245
Octal bus switch with output enable
Preliminary specification
1998 Dec 08
Philips Semiconductors
Preliminary specification
Octal bus switch with output enable
CBT3245
FEATURES
DESCRIPTION
• Functionally equivalent to QS3245
• Standard ’245-type pinout
• 5Ω switch connection between two ports
• TTL compatible control input levels
• Package options include plastic small outline (D), shrink small
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.
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.
outline (DB), thin shrink small outline (TSSOP)
The CBT3245 is characterized for operation from –40°C to 85°C.
QUICK REFERENCE DATA
SYMBOL
tPLH
tPHL
CIO(OFF)
ICCZ
CONDITIONS
Tamb = 25°C; GND = 0V
PARAMETER
Propagation delay
An to Yn
CL = 50pF; VCC = 5V
Pin capacitance (OFF state)
VO = 3V or 0V
Total supply current
Outputs disabled; VCC =5.5V
TYPICAL
UNIT
ns
6
pF
µA
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
OUTSIDE NORTH AMERICA
NORTH AMERICA
DWG NUMBER
20-Pin plastic SO
–40°C to 85°C
CBT3245 D
CBT3245 D
SOT163-1
20-Pin Plastic SSOP Type II
–40°C to 85°C
CBT3245 DB
CBT3245 DB
SOT339-1
20-Pin Plastic TSSOP Type I
–40°C to 85°C
CBT3245 PW
CBT3245PW DH
SOT360-1
PIN CONFIGURATION
PIN DESCRIPTION
SYMBOL
NAME AND FUNCTION
1
NC
No internal connection
19
OE
Output enable input
2, 3, 4, 5, 6, 7, 8, 9
A1–A8
18, 17, 16, 15, 14,
13, 12, 11
B1–B8
NC
1
20
VCC
A1
2
19
OE
A2
3
18
B1
A3
4
17
B2
A4
5
16
B3
A5
6
15
B4
10
GND
Ground (0V)
A6
7
14
B5
20
VCC
Positive supply voltage
A7
8
13
B6
A8
9
12
B7
11
B8
GND 10
SA00507
1998 Dec 08
PIN NUMBER
2
Philips Semiconductors
Preliminary specification
Octal bus switch with output enable
CBT3245
LOGIC SYMBOL
A1
A8
FUNCTION TABLE
2
18
9
11
B1
INPUT
INPUTS/OUTPUTS
OE
A, B
L
A=B
H
Z
B8
H = High voltage level
L = Low voltage level
Z = High impedance “off ” state
OE
19
SA00508
ABSOLUTE MAXIMUM RATINGS1, 2
PARAMETER
SYMBOL
VCC
CONDITIONS
RATING
UNIT
–0.5 to +7.0
V
–50
mA
–0.5 to +7.0
V
VO < 0
–50
mA
output in Off or High state
–0.5 to +7
V
output in Low state
128
mA
–65 to 150
°C
DC supply voltage
IIK
DC input diode current
VI
DC input voltage3
IOK
DC output diode current
VI < 0
voltage3
VOUT
DC output
IOUT
DC output current
Tstg
Storage temperature range
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
Max
5.5
VCC
DC supply voltage
4.0
VIH
High-level input voltage
2.0
VIL
Low-level Input voltage
Tamb
1998 Dec 08
Operating free-air temperature range
–40
3
V
V
0.8
V
+85
°C
Philips Semiconductors
Preliminary specification
Octal bus switch with output enable
CBT3245
DC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
Tamb = –40°C to +85°C
Min
VIK
II
ICC
∆ICC
CI
CIO(OFF)
ron3
Input clamp voltage
VCC = 4.5V; II = –18mA
Input leakage current
Quiescent supply current2
Typ1
UNIT
Max
–1.2
V
VCC = 5.5V; VI = GND or 5.5V
±5
µA
VCC = 5.5V; IO = 0, VI = VCC or GND
50
µA
Additional supply current per
input pin2
VCC = 5.5V, one input at 3.4V, other inputs at
VCC or GND
3.5
mA
Control pins
VI= 3V or 0, OE = VCC
3
Power-off leakage current
VO = 3V or 0
6
VCC = 4.5V; V1 = 0V; II = 64mA
5
On-resistance
pF
pF
7
VCC = 4.5V; V1 = 0V; II = 30mA
5
7
VCC = 4.5V; V1 = 2.4V; II = 15mA
10
15
Ω
NOTES:
1. All typical values are at VCC = 5V, TA = 25 C
2. This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND
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; tR; CL = 50pF
74CBT3245
SYMBOL
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
Tamb = –40°C to +85°C
VCC = +5.0V ±0.5V
Min
tpd
Propagation delay1
ten
tdis
UNIT
Max
A or B
B or A
.25
ns
Output enable time
to High and Low level
OE
A or B
ns
Output disable time
from High and Low level
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).
1998 Dec 08
4
Philips Semiconductors
Preliminary specification
Octal bus switch with output enable
CBT3245
AC WAVEFORMS
VM = 1.5V, VIN = GND to 3.0V
3V
3V
Output Control
(Low-level
enabling
1.5V
1.5V
INPUT
1.5 V
1.5 V
0V
3.5V
VOH
1.5V
0V
tPLZ
tPZL
tPHL
tPLH
Output
Waveform 1
S1 at 7 V
(see Note)
1.5V
OUTPUT
1.5 V
Output
Waveform 2
S1 at Open
(see Note)
SA00028
Waveform 1. Input to Output Propagation Delays
VOL
tPHZ
tPZH
VOL
VOL + 0.3V
VOH
VOH – 0.3V
1.5 V
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
7V
500 Ω
From Output
Under Test
S1
Open
GND
500 Ω
CL = 50 pF
Load Circuit
TEST
S1
tpd
open
tPLZ/tPZL
7V
tPHZ/tPZH
open
DEFINITIONS
Load capacitance includes jig and probe capacitance;
CL =
see AC CHARACTERISTICS for value.
SA00012
NOTES:
1. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.
2. The outputs are measured one at a time with one transition per measurement.
1998 Dec 08
5
Philips Semiconductors
Preliminary specification
Octal bus switch with output enable
CBT3245
SO20: plastic small outline package; 20 leads; body width 7.5 mm
1998 Dec 08
6
SOT163-1
Philips Semiconductors
Preliminary specification
Octal bus switch with output enable
CBT3245
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
1998 Dec 08
7
SOT339-1
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
1998 Dec 08
8
SOT360-1
Philips Semiconductors
Preliminary specification
Octal bus switch with output enable
CBT3245
NOTES
1998 Dec 08
9
Philips Semiconductors
Preliminary specification
Octal bus switch with output enable
CBT3245
Data sheet status
Data sheet
status
Product
status
Definition [1]
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.
Right to make changes — Philips Semiconductors reserves 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.
 Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
print code
Document order number:
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Date of release: 05-96
9397-750-04607