参数资料
型号: 74AHCT125
厂商: NXP Semiconductors N.V.
英文描述: Quad buffer/line driver; 3-state(四通道缓冲器/线驱动器(三态))
中文描述: 四缓冲器/线路驱动器,3态(四通道缓冲器/线驱动器(三态))
文件页数: 2/16页
文件大小: 78K
代理商: 74AHCT125
1999 Sep 27
2
Philips Semiconductors
Product specification
Quad buffer/line driver; 3-state
74AHC125; 74AHCT125
FEATURES
ESD protection:
HBM EIA/JESD22-A114-A
exceeds 2000 V
MM EIA/JESD22-A115-A
exceeds 200 V
CDM EIA/JESD22-C101
exceeds 1000 V
Balanced propagation delays
All inputs have Schmitt-trigger
actions
Inputsacceptsvoltageshigherthan
V
CC
For AHC only:
operates with CMOS input levels
For AHCT only:
operates with TTL input levels
Specified from
40 to +85 and +125
°
C.
DESCRIPTION
The 74AHC/AHCT125 are
high-speed Si-gate CMOS devices
and are pin compatible with low
power Schottky TTL (LSTTL). They
are specified in compliance with
JEDEC standard No. 7A.
The 74AHC/AHCT125 are four
non-inverting buffer/line drivers with
3-state outputs. The 3-state outputs
(nY) are controlled by the output
enable input (nOE). A HIGH at n
causes the outputs to assume a
HIGH-impedance OFF-state.
The ‘125’ is identical to the ‘126’ but
has active LOW enable inputs.
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
3.0 ns.
Notes
1.
C
PD
is used to determine the dynamic power dissipation (P
D
in
μ
W).
P
D
= C
PD
×
V
CC2
×
f
i
+
(C
L
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz;
f
o
= output frequency in MHz;
(C
L
×
V
CC2
×
f
o
) = sum of outputs;
C
L
= output load capacitance in pF;
V
CC
= supply voltage in Volts.
The condition is V
I
= GND to V
CC
.
2.
FUNCTION TABLE
See note 1.
Note
1.
H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
AHC
AHCT
t
PHL
/t
PLH
propagation delay
nA to nY
input capacitance
output capacitance
power dissipation
capacitance
C
L
= 15 pF;
V
CC
= 5 V
V
I
= V
CC
or GND
3.0
3.0
ns
C
I
C
O
C
PD
3.0
4.0
10
3.0
4.0
12
pF
pF
pF
C
L
= 50 pF;
f = 1 MHz;
notes 1 and 2
INPUT
OUTPUT
nOE
nA
nY
L
L
H
L
H
X
L
H
Z
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