HD74CBT1G126
Single FET Bus Switch
ADE-205-661 (Z)
Rev. 0
Jan. 2002
Description
The HD74CBT1G126 features a single high-speed line switch. The switch is disabled when the output
enable (OE) input is low.
Features
•
Minimal propagation delay through the switch.
•
5
Ω
switch connection between two ports.
•
TTL-compatible input levels.
•
Ultra low quiescent power.
-Ideally suited for notebook applications.
•
Package Type
Package type
CMPAK-5 pin
Package code
CMPAK-5
Package suffix
CM
Taping code
E (3,000 pcs / Reel)
HD74CBT1G126
Outline and Article Indication
•
HD74CBT1G126
Index band
Marking
B
C
CMPAK–5
= Control code
(
or blank)
Function Table
Input OE
H
L
H:
L:
High level
Low level
Function
A port = B port
Disconnect
Pin Arrangement
OE
1
5
V
CC
A
2
GND
3
4
B
(Top view)
Rev.0, Jan. 2002, page 2 of 9
HD74CBT1G126
Absolute Maximum Ratings
Item
Supply voltage range
Input voltage range
Input clamp current
Continuous output current
Continuous current through
V
CC
or GND
Maximum power dissipation
*2
at Ta = 25°C (in still air)
Storage temperature
Notes:
*1
Symbol
V
CC
V
I
I
IK
I
O
I
CC
or I
GND
P
T
Tstg
Ratings
−0.5
to 7.0
−0.5
to 7.0
−50
128
±100
200
−65
to 150
Unit
V
V
mA
mA
mA
mW
°C
Conditions
V
I
< 0
V
O
= 0 to V
CC
The absolute maximum ratings are values which must not individually be exceeded, and
furthermore, no two of which may be realized at the same time.
1. The input and output voltage ratings may be exceeded even if the input and output clamp-current
ratings are observed.
2. The maximum package power dissipation was calculated using a junction temperature of 150°C.
Recommended Operating Conditions
Item
Supply voltage range
Input voltage range
Output voltage range
Input transition rise or fall rate
Operating free-air temperature
Symbol
V
CC
V
I
V
I/O
∆t
/
∆v
Ta
Min
4.0
0
0
0
−40
Max
5.5
5.5
5.5
5
85
Unit
V
V
V
ns / V
°C
V
CC
= 4.5 to 5.5 V
Conditions
Note: Unused or floating inputs must be held high or low.
Rev.0, Jan. 2002, page 3 of 9
HD74CBT1G126
DC Electrical Characteristics
(Ta =
−40
to 85°C)
Item
Clamp diode voltage
Input voltage
Symbol
V
IK
V
IH
V
IL
On-state switch
*2
resistance
R
ON
V
CC
(V)
4.5
4.0 to 5.5
4.0 to 5.5
4.0
Min
2.0
Typ
14
*1
Max
−1.2
0.8
20
Unit
V
V
Ω
Test conditions
I
IN
=
−18
mA
V
IN
= 2.4 V,
I
IN
= 15 mA
Typ at V
CC
= 4.0 V
V
IN
= 0 V,
I
IN
= 64 mA
V
IN
= 0 V,
I
IN
= 30 mA
V
IN
= 2.4 V,
I
IN
= 15 mA
4.5
4.5
4.5
Input current
Off-state leakage
current
Quiescent supply
current
Increase in I
CC
*3
per input
Notes:
I
IN
I
OZ
I
CC
∆I
CC
0 to 5.5
5.5
5.5
5.5
5
5
10
7
7
15
±1.0
±1.0
1.0
2.5
µA
µA
µA
mA
V
IN
= 5.5 V or GND
0
≤
A, B
≤
V
CC
V
IN
= V
CC
or GND,
I
O
= 0 mA
One input at 3.4 V,
other inputs at V
CC
or
GND
For condition shown as Min or Max use the appropriate values under recommended operating
conditions.
1. All typical values are at V
CC
= 5 V (unless otherwise noted), Ta = 25°C.
2. 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 voltage of the two (A or B) terminals.
3. This is the increase in supply current for each input that is at the specified TTL voltage level
rather than V
CC
or GND.
Capacitance
(Ta = 25°C)
Item
Control input
capacitance
Input / output
capacitance
Symbol
C
IN
C
I/O (OFF)
V
CC
(V)
5.0
5.0
Min
Typ
3
5
Max
Unit
pF
pF
Test conditions
V
IN
= 0 or 3 V
V
O
= 0 or 3 V
OE = GND
Note: This parameter is determined by device characterization is not production tested.
Rev.0, Jan. 2002, page 4 of 9
HD74CBT1G126
Switching Characteristics
(Ta =
−40
to 85°C)
•
V
CC
= 4.0 V
Symbol
t
PLH
t
PHL
t
ZH
t
ZL
t
HZ
t
LZ
Min
Max
0.35
5.5
4.5
4.5
Unit
ns
ns
ns
Test
conditions
C
L
= 50 pF
R
L
= 500
Ω
C
L
= 50 pF
R
L
= 500
Ω
C
L
= 50 pF
R
L
= 500
Ω
FROM
(Input)
A or B
OE
OE
TO
(Output)
B or A
A or B
A or B
Item
Propagation delay
*1
time
Enable time
Disable time
•
V
CC
= 5.0±0.5 V
Symbol
t
PLH
t
PHL
t
ZH
t
ZL
t
HZ
t
LZ
Min
1.6
1.0
1.0
Max
0.25
4.9
4.2
4.8
Unit
ns
ns
ns
Test
conditions
C
L
= 50 pF
R
L
= 500
Ω
C
L
= 50 pF
R
L
= 500
Ω
C
L
= 50 pF
R
L
= 500
Ω
FROM
(Input)
A or B
OE
OE
TO
(Output)
B or A
A or B
A or B
Item
Propagation delay
*1
time
Enable time
Disable time
Note:
1. 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).
Rev.0, Jan. 2002, page 5 of 9
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