74AHC2G126; 74AHCT2G126
Dual buffer/line driver; 3-state
Rev. 02 — 21 September 2004
Product data sheet
1. General description
The 74AHC2G126; AHCT2G126 is a high-speed Si-gate CMOS device.
The 74AHC2G126; AHCT2G126 provides a dual non-inverting buffer/line driver with
3-state output. The 3-state output is controlled by the output enable input (OE). A LOW at
pin nOE causes the output to assume a high-impedance OFF-state.
2. Features
s
Symmetrical output impedance
s
High noise immunity
s
ESD protection:
x
HBM EIA/JESD22-A114-B exceeds 2000 V
x
MM EIA/JESD22-A115-A exceeds 200 V
x
CDM EIA/JESD22-C101 exceeds 1000 V.
s
Low power dissipation
s
Balanced propagation delays
s
Multiple package options
s
Specified from
−40 °C
to +85
°C
and from
−40 °C
to +125
°C.
3. Quick reference data
Table 1:
Quick reference data
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
≤
3.0 ns.
Symbol
t
PHL
, t
PLH
C
I
C
PD
Parameter
propagation delay
nA to nY
input capacitance
power dissipation
capacitance
C
L
= 50 pF; f
i
= 1 MHz
[1] [2]
Conditions
C
L
= 15 pF; V
CC
= 5 V
Min
-
-
-
Typ
3.4
1.5
10
Max
5.5
10
-
Unit
ns
pF
pF
Type 74AHC2G126
Philips Semiconductors
74AHC2G126; 74AHCT2G126
Dual buffer/line driver; 3-state
Table 1:
Quick reference data
…continued
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
≤
3.0 ns.
Symbol
t
PHL
, t
PLH
C
I
C
PD
Parameter
propagation delay
nA to nY
input capacitance
power dissipation
capacitance
C
L
= 50 pF; f
i
= 1 MHz
[1] [2]
Conditions
C
L
= 15 pF; V
CC
= 5 V
Min
-
-
-
Typ
3.4
1.5
10
Max
5.5
10
-
Unit
ns
pF
pF
Type 74AHCT2G126
[1]
C
PD
is used to determine the dynamic power dissipation (P
D
in
µW).
P
D
= C
PD
×
V
CC2
×
f
i
×
N +
Σ(C
L
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz;
f
o
= output frequency in MHz;
C
L
= output load capacitance in pF;
V
CC
= supply voltage in Volts;
N = total load switching outputs;
Σ(C
L
×
V
CC2
×
f
o
) = sum of the outputs.
The condition is V
I
= GND to V
CC
.
[2]
4. Ordering information
Table 2:
Ordering information
Package
Temperature range
74AHC2G126DP
74AHCT2G126DP
74AHC2G126DC
74AHCT2G126DC
74AHC2G126GM
74AHCT2G126GM
−40 °C
to +125
°C
−40 °C
to +125
°C
−40 °C
to +125
°C
−40 °C
to +125
°C
−40 °C
to +125
°C
−40 °C
to +125
°C
Name
TSSOP8
TSSOP8
VSSOP8
VSSOP8
XSON8
XSON8
Description
Version
plastic thin shrink small outline package; 8 leads; SOT505-2
body width 3 mm; lead length 0.5 mm
plastic thin shrink small outline package; 8 leads; SOT505-2
body width 3 mm; lead length 0.5 mm
plastic very thin shrink small outline package;
8 leads; body width 2.3 mm
plastic very thin shrink small outline package;
8 leads; body width 2.3 mm
SOT765-1
SOT765-1
Type number
plastic extremely thin small outline package;
SOT833-1
no leads; 8 terminals; body 0.95
×
1.95
×
0.5 mm
plastic extremely thin small outline package;
SOT833-1
no leads; 8 terminals; body 0.95
×
1.95
×
0.5 mm
9397 750 13736
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 02 — 21 September 2004
2 of 20
Philips Semiconductors
74AHC2G126; 74AHCT2G126
Dual buffer/line driver; 3-state
5. Marking
Table 3:
Marking
Marking code
A26
C26
A26
C26
A26
C26
Type number
74AHC2G126DP
74AHCT2G126DP
74AHC2G126DC
74AHCT2G126DC
74AHC2G126GM
74AHCT2G126GM
6. Functional diagram
2
1
5
7
1A
1OE
2A
2OE
1Y
6
2Y
3
2
1
5
3
7
1
EN1
6
mna946
mna947
Fig 1. Logic symbol.
Fig 2. IEC logic symbol.
A
Y
OE
mna127
Fig 3. Logic diagram.
9397 750 13736
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 02 — 21 September 2004
3 of 20
Philips Semiconductors
74AHC2G126; 74AHCT2G126
Dual buffer/line driver; 3-state
7. Pinning information
7.1 Pinning
126
1OE
1OE
1A
2Y
GND
1
2
3
4
001aab648
1
8
V
CC
8
7
V
CC
2OE
1Y
2A
1A
2
7
2OE
126
6
5
2Y
3
6
1Y
GND
4
5
2A
001aab647
Transparent top view
Fig 4. Pin configuration TSSOP8 and
VSSOP8.
Fig 5. Pin configuration XSON8.
7.2 Pin description
Table 4:
Symbol
1OE
1A
2Y
GND
2A
1Y
2OE
V
CC
Pin description
Pin
1
2
3
4
5
6
7
8
Description
output enable input (active HIGH)
data input
data output
ground (0 V)
data input
data output
output enable input (active HIGH)
supply voltage
9397 750 13736
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 02 — 21 September 2004
4 of 20
Philips Semiconductors
74AHC2G126; 74AHCT2G126
Dual buffer/line driver; 3-state
8. Functional description
8.1 Function table
Table 5:
Input
nOE
H
H
L
[1]
H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
Function table
[1]
Output
nA
L
H
X
nY
L
H
Z
9. Limiting values
Table 6:
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to
GND (ground = 0 V).
Symbol
V
CC
V
I
I
IK
I
OK
I
O
I
CC
, I
GND
T
stg
P
tot
[1]
Parameter
supply voltage
input voltage
input diode current
output diode current
Conditions
Min
−0.5
−0.5
Max
+7.0
+7.0
−20
±20
±25
±75
+150
250
Unit
V
V
mA
mA
mA
mA
°C
mW
V
I
<
−0.5
V
V
O
<
−0.5
V or V
O
> V
CC
+ 0.5 V
[1]
-
-
-
-
−65
output source or sink V
O
>
−0.5
V or V
O
< V
CC
+ 0.5 V
current
V
CC
or GND current
storage temperature
power dissipation
T
amb
=
−40 °C
to +125
°C
-
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
10. Recommended operating conditions
Table 7:
Symbol
V
CC
V
I
V
O
T
amb
t
r
, t
f
Recommended operating conditions
Parameter
supply voltage
input voltage
output voltage
operating ambient
temperature
input rise and fall
times
see
Section 11
and
Section 12
per device
V
CC
= 3.3 V
±
0.3 V
V
CC
= 5.0 V
±
0.5 V
Conditions
Min
2.0
0
0
−40
-
-
Typ
5.0
-
-
+25
-
-
Max
5.5
5.5
V
CC
+125
100
20
Unit
V
V
V
°C
ns/V
ns/V
Type 74AHC2G126
9397 750 13736
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 02 — 21 September 2004
5 of 20
