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