Philips CBT3245 Datasheet
INTEGRATED CIRCUITS
CBT3245
Octal bus switch with output enable
Preliminary specification
1998 Dec 08
Philips Semiconductors Preliminary specification
CBT3245Octal bus switch with output enable
FEATURES
•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
outline (DB), thin shrink small outline (TSSOP)
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.
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
exists between the two ports.
is high, the switch is open and a high-impedance state
The CBT3245 is characterized for operation from –40°C to 85°C.
QUICK REFERENCE DATA
SYMBOL PARAMETER
t
PLH
t
PHL
C
IO(OFF)
I
CCZ
Propagation delay
An to Yn
Pin capacitance (OFF state) VO = 3V or 0V 6 pF
Total supply current Outputs disabled; VCC =5.5V µA
CL = 50pF; VCC = 5V ns
CONDITIONS
T
= 25°C; GND = 0V
amb
TYPICAL UNIT
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
1
NC
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
A8 B7
10 11
GND
20
V
OE
19
B1
18
B2
17
B3
16
B4
15
B5
14
B6
13
12
B8
SA00507
CC
PIN DESCRIPTION
PIN NUMBER 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
10 GND Ground (0V)
20 V
B1–B8
CC
Positive supply voltage
1998 Dec 08
2
Philips Semiconductors Preliminary specification
SYMBOL
PARAMETER
UNIT
CBT3245Octal bus switch with output enable
LOGIC SYMBOL
FUNCTION TABLE
INPUT INPUTS/OUTPUTS
A1
2
18
B1
OE A, B
L A = B
A8
9
11
B8
H = High voltage level
H Z
L = Low voltage level
Z = High impedance “off” state
19
OE
SA00508
ABSOLUTE MAXIMUM RATINGS
SYMBOL
V
CC
I
IK
V
I
I
OK
V
OUT
I
OUT
T
stg
DC supply voltage –0.5 to +7.0 V
DC input diode current V
DC input voltage
DC output diode current VO < 0 –50 mA
DC output voltage
DC output current output in Low state 128 mA
Storage temperature range –65 to 150 °C
PARAMETER CONDITIONS RATING UNIT
3
3
1, 2
< 0 –50 mA
I
–0.5 to +7.0 V
output in Off or High state –0.5 to +7 V
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 ju nction
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
V
CC
V
V
T
amb
1998 Dec 08
DC supply voltage 4.0 5.5 V
High-level input voltage 2.0 V
IH
Low-level Input voltage 0.8 V
IL
Operating free-air temperature range –40 +85 °C
LIMITS
Min Max
3
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