Philips
Semiconductors
74LVT126
3.3V Quad buffer (3-State)
Product specification
Supersedes data of 1995 Dec 21
IC23 Data Handbook
1998 Feb 19
INTEGRATED CIRCUITS
Philips Semiconductors
Product specification
74LVT126
3.3V Quad buffer (3-State)
2
1998 Feb 19
853-1822 18991
FEATURES
Quad bus interface
3-State buffers
Output capability: +64mA/-32mA
TTL input and output switching levels
Input and output interface capability to systems at 5V supply
Bus-hold data inputs eliminate the need for external pull-up
resistors to hold unused inputs
Live insertion/extraction permitted
No bus current loading when output is tied to 5V bus
Power-up 3-State
Latch-up protection exceeds 500mA per JEDEC Std 17
ESD protection exceeds 2000V per MIL STD 883 Method 3015
and 200V per Machine Model
DESCRIPTION
The LVT126 is a high-performance BiCMOS product designed for
V
CC
operation at 3.3V.
This device combines low static and dynamic power dissipation with
high speed and high output drive.
The 74LVT126 device is a quad buffer that is ideal for driving bus
lines. The device features four Output Enables (OE0, OE1, OE2,
OE3), each controlling one of the 3-State outputs.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
T
amb
= 25
C; GND = 0V
TYPICAL
UNIT
t
PLH
t
PHL
Propagation delay
An to Yn
C
L
= 50pF; V
CC
= 3.3V
2.3
2.4
ns
C
IN
Input capacitance
V
I
= 0V or V
CC
4
pF
C
OUT
Output capacitance
Outputs disabled; V
O
= 0V or 3.0V
8
pF
I
CCZ
Total supply current
Outputs disabled; V
CC
= 3.6V
0.13
mA
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
OUTSIDE NORTH AMERICA
NORTH AMERICA
DWG NUMBER
14-Pin Plastic SO
40
C to +85
C
74LVT126 D
74LVT126 D
SOT108-1
14-Pin Plastic SSOP
40
C to +85
C
74LVT126 DB
74LVT126 DB
SOT337-1
14-Pin Plastic TSSOP
40
C to +85
C
74LVT126 PW
74LVT126PW DH
SOT402-1
PIN DESCRIPTION
PIN NUMBER
SYMBOL
NAME AND FUNCTION
2, 5, 9, 12
A0 A3
Data inputs
3, 6, 8, 11
Y0 Y3
Data outputs
1, 4, 10, 13
OE0 OE3
Output enable inputs
7
GND
Ground (0V)
14
V
CC
Positive supply voltage
PIN CONFIGURATION
OE0
A0
Y0
OE1
A1
Y1
GND
Y2
A2
OE2
Y3
A3
OE3
VCC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SA00031
LOGIC SYMBOL
2
3
Y0
OE0
1
5
6
Y1
OE1
4
9
8
Y2
OE2
10
12
11
Y3
13
A0
A1
A2
A3
SV00093
OE3
Philips Semiconductors
Product specification
74LVT126
3.3V Quad buffer (3-State)
1998 Feb 19
3
LOGIC SYMBOL (IEEE/IEC)
1
3
2
EN
4
6
5
10
8
9
13
11
12
1
SV00134
FUNCTION TABLE
INPUTS
OUTPUTS
OEn
An
Yn
H
L
L
H
H
H
L
X
Z
H = High voltage level
L
= Low voltage level
X = Don't care
Z = High impedance "off " state
ABSOLUTE MAXIMUM RATINGS
1, 2
SYMBOL
PARAMETER
CONDITIONS
RATING
UNIT
V
CC
DC supply voltage
0.5 to +4.6
V
V
I
DC input voltage
3
0.5 to +7.0
V
V
OUT
DC output voltage
3
Output in Off or High state
0.5 to +7.0
V
I
O
DC output current
Output in Low state
128
mA
I
OUT
DC output current
Out in High State
64
mA
I
IK
DC input diode current
V
I
< 0
50
mA
I
OK
DC output diode current
V
O
< 0
50
mA
T
stg
Storage temperature range
65 to 150
C
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 150
C.
3. The input and output negative voltage ratings may be exceeded if the input and output clamp current ratings are observed.
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
LIMITS
UNIT
MIN
MAX
V
CC
DC supply voltage
2.7
3.6
V
V
I
Input voltage
0
5.5
V
V
IH
High-level input voltage
2.0
V
V
IL
Low-level input voltage
0.8
V
I
OH
High-level output current
32
mA
I
OL
Low-level output current
32
mA
I
OL
Low-level output current; current duty cycle
50%, f
1kHz
64
mA
t/
v
Input transition rise or fall rate; outputs enabled
10
ns/V
T
amb
Operating free-air temperature range
40
+85
C
Philips Semiconductors
Product specification
74LVT126
3.3V Quad buffer (3-State)
1998 Feb 19
4
DC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
Temp = -40
C to +85
C
UNIT
MIN
TYP
1
MAX
V
IK
Input clamp voltage
V
CC
= 2.7V; I
IK
= 18mA
0.9
1.2
V
V
CC
= 2.7 to 3.6V; I
OH
= 100
A
V
CC
-0.2
V
CC
-0.1
V
OH
High-level output voltage
V
CC
= 2.7V; I
OH
= 8mA
2.4
2.5
V
V
CC
= 3.0V; I
OH
= 32mA
2.0
2.2
V
CC
= 2.7V; I
OL
= 100
A
0.1
0.2
V
CC
= 2.7V; I
OL
= 24mA
0.3
0.5
V
OL
Low-level output voltage
V
CC
= 3.0V; I
OL
= 16mA
0.25
0.4
V
V
CC
= 3.0V; I
OL
= 32mA
0.3
0.5
V
CC
= 3.0V; I
OL
= 64mA
0.4
0.55
V
CC
= 0 or 3.6V; V
I
= 5.5V
All inputs
1
10
I
I
Input leakage current
V
CC
= 3.6V; V
I
= V
CC
or GND
Control pins
0.1
1
A
I
I
In ut leakage current
V
CC
= 3.6V; V
I
= V
CC
Data pins
4
0.1
1
A
V
CC
= 3.6V; V
I
= 0
Data ins
4
1
-5
I
OFF
Output off current
V
CC
= 0V; V
I
or V
O
= 0 to 4.5V
1
100
A
6
V
CC
= 3V; V
I
= 0.8V
75
150
I
HOLD
Bus Hold current A inputs
6
V
CC
= 3V; V
I
= 2.0V
75
150
A
V
CC
= 0V to 3.6V; V
CC
= 3.6V
500
I
EX
Current into an output in the
High state when V
O
> V
CC
V
O
= 5.5V; V
CC
= 3.0V
60
125
A
I
PU/PD
Power up/down 3-State
output current
3
V
CC
1.2V; V
O
= 0.5V to V
CC
; V
I
= GND or V
CC
;
OE/OE = Don't care
1
100
A
I
OZH
3-State output high current
V
CC
= 3.6V; V
O
= 3.0V
1
5
A
I
OZL
3-State output low current
V
CC
= 3.6V; V
O
= 0.5V
1
5
A
I
CCH
V
CC
= 3.6V; Outputs High, V
I
= GND or V
CC,
I
O =
0
0.13
0.19
I
CCL
Quiescent supply current
V
CC
= 3.6V; Outputs Low, V
I
= GND or V
CC,
I
O =
0
2
7
mA
I
CCZ
V
CC
= 3.6V; Outputs Disabled; V
I
= GND or V
CC,
I
O =
0
5
0.13
0.19
I
CC
Additional supply current per
input pin
2
V
CC
= 3V to 3.6V; One input at V
CC
-0.6V,
Other inputs at V
CC
or GND
0.1
0.2
mA
NOTES:
1. All typical values are at V
CC
= 3.3V and T
amb
= 25
C.
2. This is the increase in supply current for each input at the specified voltage level other than V
CC
or GND
3. This parameter is valid for any V
CC
between 0V and 1.2V with a transition time of up to 10msec. From V
CC
= 1.2V to V
CC
= 3.3V
0.3V a
transition time of 100
sec is permitted. This parameter is valid for T
amb
= 25
C only.
4. Unused pins at V
CC
or GND.
5. I
CCZ
is measured with outputs pulled up to V
CC
or down to GND.
6. This is the bus hold overdrive current required to force the input to the opposite logic state.
AC CHARACTERISTICS
GND = 0V; t
R
= t
F
= 2.5ns; C
L
= 50pF; R
L
= 500
, T
amb
= 40
C to +85
C.
LIMITS
SYMBOL
PARAMETER
WAVEFORM
V
CC
= 3.3V
0.3V
V
CC
= 2.7V
UNIT
MIN
TYP
1
MAX
MAX
t
PLH
t
PHL
Propagation delay
An to Yn
1
1.0
1.0
2.3
2.4
3.8
3.9
4.5
4.4
ns
t
PZH
t
PZL
Output enable time
OEn to Yn
2
1.0
1.1
3.6
3.6
5.4
5.2
6.1
5.8
ns
t
PHZ
t
PLZ
Output disable time
OEn to Yn
2
1.0
1.3
2.2
3.6
3.8
5.5
4.3
6.1
ns
NOTE:
1. All typical values are at V
CC
= 3.3V and T
amb
= 25
C.
Philips Semiconductors
Product specification
74LVT126
3.3V Quad buffer (3-State)
1998 Feb 19
5
AC WAVEFORMS
V
M
= 1.5V, V
IN
= GND to 3.0V
INPUT
1.5V
OUTPUT
t
PLH
t
PHL
SA00028
1.5V
1.5V
1.5V
3 V
0 V
V
OH
V
OL
Waveform 1. Input (An) to Output (Yn) Propagation Delays
OE INPUT
VM
VM
tPZH
tPHZ
Yn OUTPUT
VOH
VM
VM
Yn OUTPUT
VOL
tPZL
tPLZ
3.5V
0V
VOL + 0.3V
VOH 0.3V
SV00094
Waveform 2. 3-State Output Enable and Disable Times
TEST CIRCUIT AND WAVEFORMS
VM
VM
tW
AMP (V)
NEGATIVE
PULSE
10%
10%
90%
90%
0V
VM
VM
tW
AMP (V)
POSITIVE
PULSE
90%
90%
10%
10%
0V
tTHL (tF)
tTLH (tR)
tTHL (tF)
tTLH (tR)
V
M
= 1.5V
Input Pulse Definition
DEFINITIONS
R
L
=
Load resistor; see AC CHARACTERISTICS for value.
C
L
=
Load capacitance includes jig and probe capacitance;
see AC CHARACTERISTICS for value.
R
T
=
Termination resistance should be equal to Z
OUT
of
pulse generators.
INPUT PULSE REQUIREMENTS
FAMILY
74LVT
PULSE
GENERATOR
VIN
D.U.T.
VOUT
CL
VCC
RL
Test Circuit for 3-State Outputs
6.0V
R
T
RL
SV00092
Open
GND
SWITCH POSITION
TEST
SWITCH
t
PLH
/t
PHL
t
PLZ
/t
PZL
t
PHZ
/t
PZH
Open
6V
GND
Amplitude
Rep. Rate
t
W
t
R
t
F
2.7V
v
10MHz
500ns
v
2.5ns
v
2.5ns
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