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INTEGRATED CIRCUITS
CBT6800 10-bit bus switch with precharged outputs for live insertion
Product specification Supersedes data of 1999 Mar 18 1999 Oct 28
Philips Semiconductors
Philips Semiconductors
Product specification
10-bit bus switch with precharged outputs for live insertion
CBT6800
FEATURES
* 5 switch connection between two ports * TTL compatible input and output levels * Outputs are precharged by bias voltage to minimize signal
distortion during live insertion
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 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 CBT6800 is characterized for operation from -40C to 85C.
* 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 tPLH tPHL CIN COUT ICCZ PARAMETER Propagation delay An to Bn or Bn to An Input capacitance - control pin Output capacitance - I/O pins Total supply current CONDITIONS Tamb = 25C; GND = 0 V CL = 50 pF; VCC = 5 V VI = 0 V or VCC Outputs disabled; VO = 0 V or VCC Outputs disabled; VCC =5.5 V TYPICAL 250 3.5 8.2 1 UNIT ps pF pF A
ORDERING INFORMATION
PACKAGES 24-Pin Plastic TSSOP Type I TEMPERATURE RANGE -40C to +85C ORDER CODE CBT6800 PW DH DWG NUMBER SOT355-1
PIN CONFIGURATION
PIN DESCRIPTION
PIN NUMBER 1 13 SYMBOL OE BIASV A1-A10 B1-B10 GND VCC NAME AND FUNCTION Output enable Precharge bias voltage input A-port I/O pins B-port I/O pins - 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 B5 B6 B7 B8 B9 B10 BIASV
2, 3, 4, 5, 6, 7, 8, 9, 10, 11 23, 22, 21, 20, 19, 18, 17, 16, 15, 14 12 24
SA00505
1999 Oct 28
2
853-2182 22598
Philips Semiconductors
Product specification
10-bit bus switch with precharged outputs for live insertion
CBT6800
LOGIC SYMBOL
13 BIASV
FUNCTION TABLE
OE L H B1 - B10 A1 - A10 BIASV FUNCTION Connect Precharge
A1
B1
H = High voltage level L = Low voltage level Z = High impedance "off " state
A10
B10
OE
SA00536
ABSOLUTE MAXIMUM RATINGS1, 2
SYMBOL VCC IIK VI ISW Tstg BiasV PARAMETER DC supply voltage DC input diode current DC input voltage3 DC clamp diode current Storage temperature range DC voltage range VO < 0 CONDITIONS RATING -0.5 to +7.0 -50 -1.2 to +7.0 -50 -65 to 150 -0.5 to 6.0 UNIT V mA V mA C 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 150C. 3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
RECOMMENDED OPERATING CONDITIONS
SYMBOL VCC BIASV VIH VIL Tamb DC supply voltage DC supply voltage High-level input voltage Low-level Input voltage Operating free-air temperature range -40 PARAMETER LIMITS Min 4.5 1.3 2.0 0.8 +85 Max 5.5 VCC UNIT V V V V C
1999 Oct 28
3
Philips Semiconductors
Product specification
10-bit bus switch with precharged outputs for live insertion
CBT6800
DC ELECTRICAL CHARACTERISTICS
LIMITS SYMBOL VIK II IO ICC ICC CI CO(OFF) ron3 VP PARAMETER Input clamp voltage Input leakage current - OE Output bias current Quiescent supply current Control pins2 Control pins Off-state capacitance - I/O pins On-resistance Pass gate voltage TEST CONDITIONS VCC = 4.5 V; II = -18 mA VCC = 5.5 V; VI = GND or 5.5 V VCC = 4.5 V; BiasV = 2.4 V; VO = 0 VCC = 5.5 V; IO = 0, VI = VCC or GND VCC = 5.5 V, one input at 3.4 V, other inputs at VCC or GND VI= 3 V or 0 VO = 3 V or 0; switch off VCC = 4.5 V; VI = 0 V; II = 64 mA VCC = 4.5 V; VI = 0 V; II = 30 mA VCC = 4.5 V; VI = 2.4 V; II = 15 mA VIN = VCC = 5.0 V, IOUT = -100 A 3.4 3.5 8.2 5 5 10 3.6 7 7 15 3.9 V 0.25 50 2.5 Tamb = -40C to +85C Min Typ1 Max -1.2 5 V A mA A mA pF pF UNIT
NOTES: 1. All typical values are at VCC = 5 V, Tamb = 25C 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.
1999 Oct 28
4
Philips Semiconductors
Product specification
10-bit bus switch with precharged outputs for live insertion
CBT6800
AC CHARACTERISTICS
GND = 0 V; CL = 50 pF; tr = tf 2.5 ns LIMITS SYMBOL tpd tPZH TPZL tPHZ TPLZ PARAMETER Propagation delay1 BIASV = GND BIASV = 3 V BIASV = GND BIASV = 3 V FROM (INPUT) A or B ON ON TO (OUTPUT) B or A A or B A or B 2.4 3.0 1.0 3.1 VCC = +5.0 V 0.5 V Min Max .25 7.7 8.3 5.3 7.8 ns ns ns UNIT
NOTE: 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).
AC WAVEFORMS
VM = 1.5 V, VIN = GND to 3.0 V
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
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)
DEFINITIONS Load capacitance includes jig and probe capacitance; CL = see AC CHARACTERISTICS for value.
SA00012
1.5 V 1.5 V 0V 3.5V 1.5 V tPHZ VOH - 0.3V 1.5 V 0V
tPLZ
NOTES: 1. All input pulses are supplied by generators having the following characteristics: PRR 10 MHz, 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
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. Waveforms Showing the 3-State Output Enable and Disable Times
1999 Oct 28
5
Philips Semiconductors
Product specification
10-bit bus switch with precharged outputs for live insertion
CBT6800
TSSOP24: plastic thin shrink small outline package; 24 leads; body width 4.4 mm
SOT355-1
1999 Oct 28
6
Philips Semiconductors
Product specification
10-bit bus switch with precharged outputs for live insertion
CBT6800
NOTES
1999 Oct 28
7
Philips Semiconductors
Product specification
10-bit bus switch with precharged outputs for live insertion
CBT6800
Data sheet status
Data sheet status Objective specification Preliminary specification Product specification Product status Development Qualification Definition [1] This data sheet contains the design target or goal specifications for product development. Specification 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.
Production
[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. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088-3409 Telephone 800-234-7381 (c) Copyright Philips Electronics North America Corporation 1999 All rights reserved. Printed in U.S.A. Date of release: 10-99 Document order number: 9397 750 06552
Philips Semiconductors
1999 Oct 28 8

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