SN74CBTS6800DBQ [TI]
10-BIT FET BUS SWITCH WITH PRECHARGED OUTPUTS AND SCHOTTKY DIODE CLAMPING; 与预充电输出和肖特基二极管钳位的10位FET总线开关
| 型号： | SN74CBTS6800DBQ |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 10-BIT FET BUS SWITCH WITH PRECHARGED OUTPUTS AND SCHOTTKY DIODE CLAMPING |
| 文件： | 总4页 (文件大小：60K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN74CBTS6800
10-BIT FET BUS SWITCH
WITH PRECHARGED OUTPUTS AND SCHOTTKY DIODE CLAMPING
SCDS102A – JUNE 1999 – REVISED JULY 1999
DB, DBQ, DGV, DW, OR PW PACKAGE
5-Ω Switch Connection Between Two Ports
(TOP VIEW)
TTL-Compatible Input Levels
Outputs Are Precharged by Bias Voltage to
Minimize Signal Distortion During Live
Insertion
1
24
23
22
21
20
19
18
17
16
15
14
13
ON
A1
A2
A3
A4
A5
A6
A7
A8
V
CC
B1
2
3
B2
B3
B4
B5
B6
B7
B8
B9
4
Schottky Diodes on the I/Os to Clamp
Undershoots up to –2 V
5
6
Package Options Include Plastic Shrink
Small-Outline (DB, DBQ), Thin Very
Small-Outline (DGV), Small-Outline (DW),
and Thin Shrink Small-Outline (PW)
Packages
7
8
9
10
11
12
A9
A10
GND
B10
BIASV
description
The SN74CBTS6800 provides ten bits of
high-speed TTL-compatible bus switching with
Schottky diodes on the I/Os to clamp undershoot.
The low on-state resistance of the switch allows bidirectional 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 SN74CBTS6800 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.
When ON is high or V
is 0 V, B port is precharged to BIASV through the equivalent of a 10-kΩ resistor.
CC
The SN74CBTS6800 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
ON
L
B1–B10
A1–A10
BIASV
FUNCTION
Connect
H
Precharge
logic diagram (positive logic)
13
23
BIASV
B1
2
A1
11
14
A10
ON
B10
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 1999, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74CBTS6800
10-BIT FET BUS SWITCH
WITH PRECHARGED OUTPUTS AND SCHOTTKY DIODE CLAMPING
SCDS102A – JUNE 1999 – REVISED JULY 1999
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
CC
Bias voltage range, BIASV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
Input voltage range, V (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
I
Continuous channel current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Input clamp current, I (V < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 mA
IK
I
Package thermal impedance, θ (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104°C/W
JA
DBQ package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103°C/W
DGV package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139°C/W
DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120°C/W
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
†
Stresses beyond those listed under “absolute maximum ratings” 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.
NOTES: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51.
recommended operating conditions (see Note 3)
MIN
4
MAX
UNIT
V
V
CC
Supply voltage
5.5
BIASV Supply voltage
1.3
2
V
V
CC
V
V
High-level control input voltage
Low-level control input voltage
Operating free-air temperature
V
IH
0.8
85
V
IL
T
A
–40
°C
NOTE 3: All unused control inputs of the device must be held at V
or GND to ensure proper device operation. Refer to the TI application report,
CC
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
‡
PARAMETER
A or B inputs
TEST CONDITIONS
MIN TYP
MAX
–0.7
–1.2
–5
UNIT
V
V
= 4.5 V,
I = –18 mA
V
IK
CC
I
Control inputs
I
I
I
I
V
CC
V
CC
V
CC
V
CC
V
CC
= 5.5 V,
= 5.5 V,
= 4.5 V,
= 5.5 V,
= 5.5 V,
V = GND
µA
µA
mA
µA
mA
pF
IL
I
V = 5.5 V
I
150
IH
O
BIASV = 2.4 V,
V
O
= 0
0.25
I
O
= 0,
V = V
I
or GND
3
CC
CC
§
∆I
CC
Control inputs
One input at 3.4 V,
Other inputs at V
or GND
2.5
CC
C
C
Control inputs V = 3 V or 0
3.5
4.5
i
I
V
O
= 3 V or 0,
ON = V
pF
io(OFF)
CC
V
= 4 V,
CC
V
I
= 2.4 V,
I = 15 mA
I
11
20
TYP at V
= 4 V
CC
¶
I = 64 mA
I
3
3
6
7
7
Ω
r
V = 0
I
V
CC
= 4.5 V
I = 30 mA
I
V = 2.4 V,
I
I = 15 mA
I
15
‡
§
¶
All typical values are at V
= 5 V (unless otherwise noted), T = 25°C.
A
CC
This is the increase in supply current for each input that is at the specified TTL voltage level rather than V
or GND.
CC
Measured by the voltage drop between the A and B terminals at the indicated current through the switch. On-state resistance is determined by
the lower of the voltages of the two (A or B) terminals.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74CBTS6800
10-BIT FET BUS SWITCH
WITH PRECHARGED OUTPUTS AND SCHOTTKY DIODE CLAMPING
SCDS102A – JUNE 1999 – REVISED JULY 1999
switching characteristics over recommended operating free-air temperature range, C = 50 pF
L
(unless otherwise noted) (see Figure 1)
V
= 5 V
CC
± 0.5 V
V
= 4 V
TEST
CONDITIONS
FROM
(INPUT)
TO
(OUTPUT)
CC
PARAMETER
UNIT
MIN
MAX
MIN
MAX
0.25
5.1
5.6
5
†
t
t
t
t
t
A or B
ON
B or A
A or B
0.35
6
ns
ns
pd
2
2
1
2
BIASV = GND
BIASV = 3 V
BIASV = GND
BIASV = 3 V
PZH
PZL
PHZ
PLZ
6
5.5
5.5
ON
A or B
ns
5.9
†
Thepropagation delay is the calculated RC time constant of the typical on-state resistance of the switch and the specified load capacitance, when
driven by an ideal voltage source (zero output impedance).
PARAMETER MEASUREMENT INFORMATION
7 V
TEST
S1
S1
500 Ω
Open
GND
t
Open
7 V
From Output
Under Test
pd
/t
t
PLZ PZL
t
/t
Open
C
= 50 pF
PHZ PZH
L
500 Ω
(see Note A)
Output
Control
(low-level
enabling)
3 V
0 V
1.5 V
1.5 V
LOAD CIRCUIT
t
t
PLZ
PZL
Output
Waveform 1
S1 at 7 V
3.5 V
3 V
0 V
1.5 V
Input
V + 0.3 V
OL
1.5 V
1.5 V
(see Note B)
V
OL
t
t
PZH
PHZ
t
t
PHL
PLH
Output
Waveform 2
S1 at Open
(see Note B)
V
OH
V
OH
V
– 0.3 V
1.5 V
OH
1.5 V
1.5 V
Output
0 V
V
OL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
NOTES: A.
B. 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.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Z = 50 Ω, t ≤ 2.5 ns, t ≤ 2.5 ns.
C includes probe and jig capacitance.
L
O
r
f
D. The outputs are measured one at a time with one transition per measurement.
E.
F.
G.
t
t
t
and t
and t
and t
PHL
are the same as t
.
dis
PLZ
PZL
PLH
PHZ
PZH
are the same as t
.
en
are the same as t .
pd
Figure 1. Load Circuit and Voltage Waveforms
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
IMPORTANT NOTICE
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any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO
BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1999, Texas Instruments Incorporated
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