CBT3245DB Просмотр технического описания (PDF) - Philips Electronics
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CBT3245DB Datasheet PDF : 10 Pages
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Philips Semiconductors
Octal bus switch with output enable
Preliminary specification
CBT3245
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 is high, the switch is open and a high-impedance state
exists between the two ports.
The CBT3245 is characterized for operation from –40°C to 85°C.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
tPLH
tPHL
CIO(OFF)
ICCZ
Propagation delay
An to Yn
Pin capacitance (OFF state)
Total supply current
CONDITIONS
Tamb = 25°C; GND = 0V
CL = 50pF; VCC = 5V
VO = 3V or 0V
Outputs disabled; VCC =5.5V
TYPICAL
6
UNIT
ns
pF
µA
ORDERING INFORMATION
PACKAGES
20-Pin plastic SO
20-Pin Plastic SSOP Type II
20-Pin Plastic TSSOP Type I
TEMPERATURE RANGE OUTSIDE NORTH AMERICA
–40°C to 85°C
CBT3245 D
–40°C to 85°C
CBT3245 DB
–40°C to 85°C
CBT3245 PW
NORTH AMERICA
CBT3245 D
CBT3245 DB
CBT3245PW DH
DWG NUMBER
SOT163-1
SOT339-1
SOT360-1
PIN CONFIGURATION
NC 1
A1 2
A2 3
A3 4
A4 5
A5 6
A6 7
A7 8
A8 9
GND 10
20 VCC
19 OE
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
PIN DESCRIPTION
PIN NUMBER
SYMBOL
1
NC
19
OE
2, 3, 4, 5, 6, 7, 8, 9
A1–A8
18, 17, 16, 15, 14,
13, 12, 11
B1–B8
10
GND
20
VCC
NAME AND FUNCTION
No internal connection
Output enable input
Ground (0V)
Positive supply voltage
SA00507
1998 Dec 08
2
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