74ABT2240
Octal inverting buffer with 30
Ω
series termination resistors;
3-state
Rev. 04 — 17 January 2005
Product data sheet
1. General description
The 74ABT2240 high performance BiCMOS device combines low static and dynamic
power dissipation with high speed.
The 74ABT2240 device is an octal inverting buffer that is ideal for driving bus lines. The
device features two output enable inputs (1OE and 2OE), each controlling four of the
3-state outputs.
The 74ABT2240 is designed with 30
Ω
series resistance in both the HIGH and LOW
states of the output. This design reduces line noise in applications such as memory
address drivers, clock drivers and bus receivers/transmitters.
The 74ABT2240 is the same as the 74ABT240. The part number has been changed to
reflect industry standards.
2. Features
s
s
s
s
s
s
s
Octal bus interface
3-state buffers
Live insertion and extraction permitted
Outputs include series resistance of 30
Ω,
making external termination resistors
unnecessary
Output capability: +12 mA and
−32
mA
Latch-up protection:
x
JESD78: exceeds 500 mA
ESD protection:
x
MIL STD 883 method 3015: exceeds 2000 V
x
Machine model: exceeds 200 V
Power-up 3-state
Same part as 74ABT240
s
s
Philips Semiconductors
74ABT2240
Octal inverting buffer with 30
Ω
series termination resistors; 3-state
3. Quick reference data
Table 1:
Quick reference data
GND = 0 V; T
amb
= 25
°
C.
Symbol Parameter
t
PLH
t
PHL
C
I
C
O
I
CC
Conditions
Min
-
-
-
-
-
Typ
2.8
4.3
3
7
50
Max
-
-
-
-
-
Unit
ns
ns
pF
pF
µA
propagation delay nAn to nYn C
L
= 50 pF; V
CC
= 5 V
propagation delay nAn to nYn C
L
= 50 pF; V
CC
= 5 V
input capacitance
output capacitance
quiescent supply current
V
I
= 0 V or V
CC
outputs disabled;
V
O
= 0 V or V
CC
outputs 3-state;
V
CC
= 5 V
4. Ordering information
Table 2:
Ordering information
Package
Temperature range Name
74ABT2240N
74ABT2240D
−40 °C
to +85
°C
−40 °C
to +85
°C
DIP20
S020
TSSOP20
Description
plastic dual in-line package; 20 leads (300 mil)
plastic small outline package; 20 leads; body width
7.5 mm
plastic thin shrink small outline package; 20 leads;
body width 4.4 mm
Version
SOT146-1
SOT163-1
SOT360-1
Type number
74ABT2240PW
−40 °C
to +85
°C
9397 750 14414
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 04 — 17 January 2005
2 of 16
Philips Semiconductors
74ABT2240
Octal inverting buffer with 30
Ω
series termination resistors; 3-state
5. Functional diagram
1A0
2
1A1
4
1A2
6
1A3
8
1OE
1
2A0
17
2A1
15
2A2
13
2A3
11
2OE
19
001aac382
001aac383
1Y0
18
1Y1
16
1Y2
14
1Y3
12
2
4
6
8
18
16
14
12
1
EN
2Y0
3
2Y1
5
2Y2
7
2Y3
9
17
15
13
11
3
5
7
9
19
EN
Fig 1. Logic symbol
Fig 2. IEC logic symbol
V
CC
output
GND
001aac384
Fig 3. Logic diagram one output
9397 750 14414
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 04 — 17 January 2005
3 of 16
Philips Semiconductors
74ABT2240
Octal inverting buffer with 30
Ω
series termination resistors; 3-state
6. Pinning information
6.1 Pinning
1OE
1A0
2Y0
1A1
2Y1
1A2
2Y2
1A3
2Y3
1
2
3
4
5
20 V
CC
19 2OE
18 1Y0
17 2A0
16 1Y1
2240
6
7
8
9
15 2A1
14 1Y2
13 2A2
12 1Y3
11 2A3
001aac381
GND 10
Fig 4. Pin configuration
6.2 Pin description
Table 3:
Symbol
1OE
1A0
2Y0
1A1
2Y1
1A2
2Y2
1A3
2Y3
GND
2A3
1Y3
2A2
1Y2
2A1
1Y1
2A0
Pin description
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Description
outputs 1 enable control input
data input
data output
data input
data output
data input
data output
data input
data output
ground (0 V)
data input
data output
data input
data output
data input
data output
data input
9397 750 14414
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 04 — 17 January 2005
4 of 16
Philips Semiconductors
74ABT2240
Octal inverting buffer with 30
Ω
series termination resistors; 3-state
Pin description
…continued
Pin
18
19
20
Description
data output
outputs 2 enable control input
supply voltage
Table 3:
Symbol
1Y0
2OE
V
CC
7. Functional description
7.1 Function table
Table 4:
nOE
L
L
H
[1]
H = HIGH voltage;
L = LOW voltage;
X = don’t care;
Z = high-impedance OFF-state.
Function table
[1]
Input
nAn
L
H
X
Output
nYn
H
L
Z
Control input
9397 750 14414
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 04 — 17 January 2005
5 of 16
PCB设计
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
