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INTEGRATED CIRCUITS
CBT6810 10-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion
Product specification 1999 Apr 05
Philips Semiconductors
Philips Semiconductors
Product specification
10-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion
CBT6810
FEATURES
* 5 switch connection between port A and port B * TTL compatible input and output levels * Undershoot protection included to prevent shoot through level
changes
DESCRIPTION
The CBT6810 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 CBT6810 is organized as one 10-bit switch with a single enable (OE) input. When OE is low, the switch is on and port A is connected to port B. When OE is high, the switch between port A and port B is open and the B port is precharged to BIASV through the equivalent of a 10-k resistor. The CBT6810 is characterized for operation from 0C to 85C.
* Bias voltage pre-charges the outputs to minimize signal distortion
during live insertion
QUICK REFERENCE DATA
SYMBOL tPLH tPHL CIN CIO PARAMETER Propagation delay An to Bn or Bn to An Input capacitance Input/output capacitance CONDITIONS Tamb = 25C; GND = 0V CL = 50pF; VCC = 5V VI = 0V or VCC Outputs disabled; VO = 0V or VCC TYPICAL 250 3.5 9.0 UNIT ps pF pF
ORDERING INFORMATION
PACKAGES 24-Pin Plastic TSSOP Type I TEMPERATURE RANGE -40C to +85C OUTSIDE NORTH AMERICA CBT6810 PW NORTH AMERICA CBT6810PW DH DWG NUMBER SOT355-1
PIN CONFIGURATION
PIN DESCRIPTION
PIN NUMBER 1 SYMBOL OE BIASV A1-A10 B1-B10 GND VCC NAME AND FUNCTION Output enable Bias supply pin A - port side B - port side with active pullup Ground (V) Positive supply voltage
OE A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 GND
1 2 3 4 5 6 7 8 9 10 11 12
24 23 22 21 20 19 18 17 16 15 14 13
Vcc B1 B2 B3 B4
13 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 23, 22, 21, 20, 19, 18, 17, 16, 15, 14 12
B5 B6 B7 B8 B9 B10 BIASV
24
SA00505
1999 Apr 05
2
853-2151 21177
Philips Semiconductors
Product specification
10-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion
CBT6810
LOGIC SYMBOL
FUNCTION TABLE
OE L
BIASV
STATE A port = B port A port = Z B port = BIASV
H H
A1
B1
H = High voltage level L = Low voltage level Z = High impedance "off " state
A10
B10
CE
SA00531
ABSOLUTE MAXIMUM RATINGS1, 2
SYMBOL VCC IIK VI ISW Tstg BIASV oJA PARAMETER DC supply voltage DC clamp diode current DC input voltage3 DC continuous channel current Storage temperature range DC Bias voltage range Power dissipation per package Plastic thin shrink small outline package CONDITIONS RATING -0.5 to +7.0 -50 -0.5 to +7.0 128 -65 to 150 -0.5 to 7.0 134 UNIT V mA V mA C V C/W
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 150C. 3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
1999 Apr 05
3
Philips Semiconductors
Product specification
10-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion
CBT6810
RECOMMENDED OPERATING CONDITIONS
LIMITS SYMBOL VCC BIASV VIH VIL Tamb DC supply voltage DC supply voltage High-level input voltage (control pin) Low-level Input voltage (control pin) Operating free-air temperature range -40 PARAMETER Min 4.0 1.3 2.0 0.8 +85 Max 5.5 VCC V V V V C UNIT
DC ELECTRICAL CHARACTERISTICS
LIMITS SYMBOL PARAMETER TEST CONDITIONS Tamb = -40C to +85C Min VIK II IO ICC ICC CI CO(OFF) ron3 Input clamp voltage Input leakage current (control pin) Output bias current (B pins) Quiescent supply current Control pins2 Control pins Terminal capacitance VCC = 4.5V; II = -18mA VCC = 5.5V; VI = GND or 5.5V VCC = 4.5V; BiasV = 2.4V; VO = 0, OE = VCC VCC = 5.5V; IO = 0, VI = VCC or GND VCC = 5.5V, one input at 3.4V, other inputs at VCC or GND VI= 3V or 0 VO = 3V or 0; switch off VCC = 4.5V; VI = 0V; II = 64mA On-resistance VCC = 4.5V; VI = 0V; II = 30mA VCC = 4.5V; VI = 2.4V; II = -15mA VP IUSP4 Pass voltage Undershoot static current protection VIN = VCC = 5.0V; Iout = -100A VCC = 5.0V, BiasV = VCC IB = -5A, VB 3V 3.4 3.5 9.0 5 5 10 3.6 -10 7 7 15 3.9 V mA Typ1 Max -1.2 5 -0.25 2.5 2.5 V A mA mA mA pF pF UNIT
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. 4. Force IUSP, measure VB 3V
1999 Apr 05
4
Philips Semiconductors
Product specification
10-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion
AC CHARACTERISTICS FOR VCC = 5.0V 0.5V RANGE
GND = 0V; tr = tf 2.5ns; CL = 50pF. SYMBOL tpd tPZH tPZL tPHZ tPLZ PARAMETER Propagation delay An to Bn; Bn to An2 3-State output enable time OE to An; OE to Bn; BIASV = GND 3-State output enable time OE to An; OE to Bn; BIASV = 3.0V 3-State output enable time OE to An; OE to Bn; BIASV = GND 3-State output enable time OE to An; OE to Bn; BIASV = 3.0V WAVEFORM 1 2 2 2 2
CBT6810
LIMITS Tamb = -40 to +85C MIN TYP1 MAX 0.25 1.8 2.1 1.7 1.0 3.5 4.2 3.7 5.5 5.3 7.2 6.1 7.3
UNIT ns ns ns ns ns
NOTE: 1. All typical values are measured at Tamb = 25C and VCC = 5.0V 2. 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 50pF, when driven by an ideal voltage source (zero output impedance)
AC WAVEFORMS
VM = 1.5V, VIN = GND to 3.0V
3V 1.5V INPUT 0V tPLH tPHL VOH 1.5V OUTPUT VOL 1.5V 1.5V
TEST CIRCUIT AND WAVEFORMS
7V From Output Under Test CL = 50 pF 500 S1 Open GND 500
Load Circuit
TEST tpd tPLZ/tPZL tPHZ/tPZH
S1 open 7V open
SA00028
Waveform 1. Waveforms Showing the Input (An) to Output (Yn) Propagation Delays
DEFINITIONS Load capacitance includes jig and probe capacitance; CL = see AC CHARACTERISTICS for value.
3V Output Control (Low-level enabling tPZL Output Waveform 1 S1 at 7 V (see Note) tPZH Output Waveform 2 S1 at Open (see Note) 1.5 V 1.5 V 0V 3.5V 1.5 V tPHZ 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.
SA00012
tPLZ
NOTES: 1. All input pulses are supplied by generators having the following characteristics: PRR 10MHz, ZO = 50 , tr 2.5 ns, tf 2.5 ns. 2. The outputs are measured one at a time with one transition per measurement.
VOL + 0.3V VOL VOH
SA00029
Waveform 2. Waveforms Showing the 3-State Output Enable and Disable Times
1999 Apr 05
5
Philips Semiconductors
Product specification
10-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion
CBT6810
TSSOP24: plastic thin shrink small outline package; 24 leads; body width 4.4 mm
SOT355-1
1999 Apr 05
6
Philips Semiconductors
Product specification
10-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion
CBT6810
NOTES
1999 Apr 05
7
Philips Semiconductors
Product specification
10-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion
CBT6810
DEFINITIONS
Data Sheet Identification
Objective Specification
Product Status
Formative or in Design
Definition
This data sheet contains the design target or goal specifications for product development. Specifications may change in any manner without notice. This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. 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.
Preliminary Specification
Preproduction Product
Product Specification
Full Production
Philips Semiconductors and Philips Electronics North America Corporation reserve 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. Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. LIFE SUPPORT APPLICATIONS Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices, or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088-3409 Telephone 800-234-7381 Philips Semiconductors and Philips Electronics North America Corporation register eligible circuits under the Semiconductor Chip Protection Act. (c) Copyright Philips Electronics North America Corporation 1998 All rights reserved. Printed in U.S.A.

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