Philips CBT6800 User Manual
INTEGRATED CIRCUITS
CBT6800
10-bit bus switch with precharged outputs
for live insertion
Product data
Supersedes data of 1999 Oct 28
Philips
Semiconductors
2003 Sep 12
Philips Semiconductors Product data
10-bit bus switch with precharged outputs
for live insertion
FEATURES
• 5 Ω switch connection between two ports
• TTL compatible input and output levels
• Outputs are precharged by bias voltage to minimize signal
distortion during live insertion
• Latch-up protection exceeds 100 mA per JESD78
• ESD protection exceeds 2000 V HBM per JESD22-A114,
200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
QUICK REFERENCE DATA
SYMBOL PARAMETER
C
t
PLH
t
PHL
C
OUT
I
CCZ
IN
Propagation delay
An to Bn or Bn to An
Input capacitance - control pin VI = 0 V or V
Output capacitance - I/O pins Outputs disabled; VO = 0 V or V
Total supply current Outputs disabled; VCC =5.5 V 1 µA
CL = 50 pF; VCC = 5 V 250 ps
T
CC
amb
CBT6800
DESCRIPTION
The CBT6800 provides ten bits of high-speed TTL-compatible bus
switching. The low on-state resistance of the switch allows
bi-directional connections to be made while adding near-zero
propagation delay. The device also precharges the B port to a
user-selectable bias voltage (BIASV) to minimize live-insertion noise.
The CBT6800 is organized as one 10-bit switch with a single enable
(ON
) input. When ON is low, the switch is on and port A is
connected to port B. When ON
and port B is open and the B port is precharged to BIASV through
the equivalent of a 10 kΩ resistor.
The CBT6800 is characterized for operation from -40 to 85 °C.
CONDITIONS
= 25 °C; GND = 0 V
CC
is high, the switch between port A
TYPICAL UNIT
3.5 pF
8.2 pF
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE ORDER CODE DWG NUMBER
24-Pin Plastic TSSOP -40 to +85 °C CBT6800PW SOT355-1
PIN CONFIGURATION
OE
1
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
A8
10
A9
11
A10
12
GND
24
Vcc
23
B1
22
B2
21
B3
20
B4
19
B5
18
B6
17
B7
16
B8
15
B9
14
B10
13
BIASV
PIN DESCRIPTION
PIN NUMBER SYMBOL NAME AND FUNCTION
1 OE Output enable
13 BIASV Precharge bias voltage input
2, 3, 4, 5, 6,
7, 8, 9, 10, 11
23, 22, 21, 20, 19,
18, 17, 16, 15, 14
12 GND Ground (V)
24 V
A1-A10 A-port I/O pins
B1-B10 B-port I/O pins - with active pullup
Positive supply voltage
CC
2003 Sep 12
SA00505
2
Philips Semiconductors Product data
10-bit bus switch with precharged outputs
for live insertion
LOGIC SYMBOL
13
BIASV
A1
A10
OE
B1
B10
SA00536
CBT6800
FUNCTION TABLE
OE B1 - B10 FUNCTION
L A1 - A10 Connect
H BIASV Precharge
H = HIGH voltage level
L = LOW voltage level
Z = HIGH impedance “off” state
ABSOLUTE MAXIMUM RATINGS
SYMBOL
V
CC
I
IK
V
I
I
SW
T
stg
DC supply voltage -0.5 to +7.0 V
DC input diode current -50 mA
DC input voltage
DC clamp diode current VO < 0 -50 mA
Storage temperature range -65 to 150 °C
PARAMETER CONDITIONS RATING UNIT
3
1, 2
-1.2 to +7.0 V
BiasV DC voltage range -0.5 to 6.0 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 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
SYMBOL PARAMETER
V
CC
DC supply voltage 4.5 5.5 V
BIASV DC supply voltage 1.3 V
T
V
V
amb
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
CC
UNIT
V
2003 Sep 12
3
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