TI SN74CBTS3306D

SN74CBTS3306
DUAL FET BUS SWITCH
WITH SCHOTTKY DIODE CLAMPING
SCDS029E – JANUARY 1996 – REVISED NOVEMBER 1998
D
D
D
D OR PW PACKAGE
(TOP VIEW)
5-Ω Switch Connection Between Two Ports
TTL-Compatible Input Levels
Package Options Include Plastic
Small-Outline (D) and Thin Shrink
Small-Outline (PW) Packages
1OE
1A
1B
GND
description
1
8
2
7
3
6
4
5
VCC
2OE
2B
2A
The SN74CBTS3306 features independent line switches with Schottky diodes on the I/Os to clamp undershoot.
Each switch is disabled when the associated output-enable (OE) input is high.
The SN74CBTS3306 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
(each bus switch)
INPUT
OE
FUNCTION
L
A port = B port
H
Disconnect
logic diagram (positive logic)
2
3
1B
1A
1
1OE
5
6
2B
2A
7
2OE
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  1998, 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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
SN74CBTS3306
DUAL FET BUS SWITCH
WITH SCHOTTKY DIODE CLAMPING
SCDS029E – JANUARY 1996 – REVISED NOVEMBER 1998
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
Continuous channel current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Input clamp current, IIK (VI/O < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 mA
Package thermal impedance, θJA (see Note 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
† 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
MAX
5.5
VCC
VIH
Supply voltage
4
High-level control input voltage
2
VIL
TA
Low-level control input voltage
Operating free-air temperature
–40
UNIT
V
V
0.8
V
85
°C
NOTE 3: All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
A or B inputs
TEST CONDITIONS
II = –18
18 mA
IIL
IIH
VCC = 5.5 V,
VCC = 5.5 V,
VI = GND
VI = 5.5 V
ICC
∆ICC§
Control inputs
VCC = 5.5 V,
VCC = 5.5 V,
IO = 0,
One input at 3.4 V,
Ci
Control inputs
II
Cio(OFF)
VI = 3 V or 0
VO = 3 V or 0,
VCC = 4 V,
TYP at VCC = 4 V
ron¶
VCC = 4.5 V
TYP‡
MAX
–0.7
VCC = 4
4.5
5V
V,
Control inputs
MIN
–1.2
–1
VI = VCC or GND
Other inputs at VCC or GND
OE = VCC
UNIT
V
µA
50
3
µA
2.5
mA
5
pF
6
pF
VI = 2.4 V,
II = 15 mA
14
20
VI = 0
II = 64 mA
II = 30 mA
5
7
5
7
Ω
VI = 2.4 V,
II = 15 mA
10
15
‡ All typical values are at VCC = 5 V (unless otherwise noted), TA = 25°C.
§ This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND.
¶ Measured by the voltage drop between the A and B pin at the indicated current through the switch. On-state resistance is determined by the lower
of the voltages of the two (A or B) pins.
2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
SN74CBTS3306
DUAL FET BUS SWITCH
WITH SCHOTTKY DIODE CLAMPING
SCDS029E – JANUARY 1996 – REVISED NOVEMBER 1998
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 1)
VCC = 4 V
VCC = 5 V
± 0.5 V
MIN
MIN
FROM
(INPUT)
TO
(OUTPUT)
tpd†
A or B
B or A
0.35
ten
OE
A or B
5.6
tdis
OE
A or B
4.6
PARAMETER
MAX
UNIT
MAX
0.25
ns
1.8
5
ns
1
4.3
ns
† The propagation 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
500 Ω
From Output
Under Test
Open
GND
CL = 50 pF
(see Note A)
500 Ω
3V
Output
Control
(low-level
enabling)
LOAD CIRCUIT
1.5 V
3V
1.5 V
1.5 V
0V
tPLH
tPHL
VOH
Output
1.5 V
1.5 V
VOL
Output
Waveform 1
S1 at 7 V
(see Note B)
tPLZ
3.5 V
1.5 V
tPZH
Output
Waveform 2
S1 at Open
(see Note B)
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
1.5 V
0V
tPZL
Input
S1
Open
7V
0pen
TEST
tpd
tPLZ/tPZL
tPHZ/tPZH
7V
S1
VOL + 0.3 V
VOL
tPHZ
1.5 V
VOH
VOH – 0.3 V
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
NOTES: A. CL includes probe and jig capacitance.
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, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.
D. The outputs are measured one at a time with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPHL and tPLH are the same as tpd.
Figure 1. Load Circuit and Voltage Waveforms
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3
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Copyright  1998, Texas Instruments Incorporated