Page 1
74VHC125
QUAD BUS BUFFERS (3-STATE)
■ HIGH SPEED: t
■ LOW POWER DISSIPATION:
I
= 4 µA (MAX.) at TA=25°C
CC
■ HIGH NOISE IMMUNITY:
V
= V
NIH
■ POWER DOWN PROTECTION ON INPUTS
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
■ BALANCED PROPAGATION DELAYS:
t
PLH
■ OPERATING VOLTAGE RANGE:
V
CC
■ PIN AND FUNCTION COMPATIBLE WITH
NIL
| = IOL = 8mA (MIN)
≅ t
PHL
(OPR) = 2V to 5.5V
= 3.8ns (TYP.) at VCC = 5V
PD
= 28% VCC (MIN.)
74 SERIES 125
■ IMPROVED LATCH-UP IMMUN ITY
■ LOW NOISE: V
= 0.8V (MAX.)
OLP
DESCRIPTION
The 74VHC125 is an advanced high-speed
CMOS QUAD BUS BUFFERS fabricated with
sub-micron silicon gate and double-layer metal
wiring C
2
MOS technology.
The device requires the 3-STATE control input G
to be set high to pla ce the out put in to the high
impedance state.
TSSOPSOP
Table 1: Order Codes
PACKAGE T & R
SOP 74VHC125MTR
TSSOP 74VHC125TTR
Power down protection is provided on all inputs
and 0 to 7V can be accepted on inputs with no
regard to the supply voltage. This device can be
used to interface 5V to 3V.
All inputs and outputs are equipped with
protection circuits against static disc harge, giving
them 2KV ESD immunity and transient excess
voltage.
Figure 1: Pin Connection An d I E C Logic Symbols
Rev. 7
1/12November 2004
Page 2
74VHC125
Figure 2: Input Equivalent Circuit Table 2: Pin Description
PIN N° SYMBOL NAME AND FUNCTION
1, 4, 10, 13 1G
2, 5, 9, 12 1A to 4A Data Inputs
3, 6, 8, 11 1Y to 4Y Data Outputs
7 GND Ground (0V)
14
Table 3: Truth Table
to 4G Output Enable Inputs
V
CC
Positive Supply Voltage
AG
Y
XHZ
LLL
HLH
X : Don‘t Care
Z : High Impedance
Table 4: Absolute Maximum Ratings
Symbol Parameter Value Unit
V
V
V
I
I
OK
I
I
or I
CC
T
T
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
Supply Voltage
CC
DC Input Voltage
I
DC Output Voltage -0.5 to VCC + 0.5
O
DC Input Diode Current
IK
DC Output Diode Current
DC Output Current
O
DC VCC or Ground Current
GND
Storage Temperature
stg
Lead Temperature (10 sec)
L
-0.5 to +7.0 V
-0.5 to +7.0 V
V
- 20 mA
± 20 mA
± 25 mA
± 50 mA
-65 to +150 °C
300 °C
Table 5: Recommended Operating Conditions
Symbol Parameter Value Unit
V
V
V
T
dt/dv
1) VIN from 30 % t o 70% of V
Supply Voltage
CC
Input Voltage
I
Output Voltage 0 to V
O
Operating Temperature
op
Input Rise and Fall Time (note 1) (V
(V
CC
= 3.3 ± 0.3V)
CC
= 5.0 ± 0.5V)
CC
2 to 5.5 V
0 to 5.5 V
CC
-55 to 125 °C
0 to 100
0 to 20
2/12
V
ns/V
Page 3
Table 6: DC Specifications
Symbol Parameter
V
V
V
High Level Input
IH
Voltage
V
Low Level Input
IL
Voltage
High Level Output
OH
Voltage
Low Level Output
OL
Voltage
I
High Impedance
OZ
Output Leakage
Current
Input Leakage
I
I
Current
I
Quiescent Supply
CC
Current
74VHC125
Test Condition Value
= 25°C
T
V
CC
(V)
A
Min. Typ. Max. Min. Max. Min. Max.
2.0 1.5 1.5 1.5
3.0 to
5.5
0.7V
CC
2.0 0.5 0.5 0.5
3.0 to
5.5
2.0
3.0
4.5
3.0
4.5
2.0
3.0
4.5
3.0
4.5
5.5
0 to
5.5
5.5
IO=-50 µA
I
=-50 µA
O
=-50 µA
I
O
=-4 mA
I
O
=-8 mA
I
O
IO=50 µA
=50 µA
I
O
=50 µA
I
O
=4 mA
I
O
=8 mA
I
O
= VIH or V
V
I
IL
VO = VCC or GND
V
= 5.5V or GND
I
= VCC or GND
V
I
1.9 2.0 1.9 1.9
2.9 3.0 2.9 2.9
4.4 4.5 4.4 4.4
2.58 2.48 2.4
3.94 3.8 3.7
0.3V
0.0 0.1 0.1 0.1
0.0 0.1 0.1 0.1
0.0 0.1 0.1 0.1
±0.25 ± 2.5 ± 2.5 µA
-40 to 85°C -55 to 125°C
CC
0.7V
CC
0.3V
CC
0.7V
CC
0.36 0.44 0.55
0.36 0.44 0.55
± 0.1 ± 1 ± 1 µA
44040µA
0.3V
CC
Unit
V
V
V
V
Table 7: AC Electrical Characteristics (Input t
Test Condition Value
Symbol Parameter
t
Propagation Delay
PLH
PHL
PLZ
PHZ
PZL
PZH
Time
Output Disable
Time
Output Enable
Time
0.5V
t
t
t
t
t
(*) Voltage range is 3.3V ± 0.3V
(**) Voltage range is 5.0V ±
V
3.3
3.3
5.0
5.0
3.3
3.3
5.0
5.0
3.3
5.0
C
CC
(V)
L
(pF)
(*)
15 5.6 8.0 1.0 9.5 1.0 9.5
(*)
50 8.1 11.5 1.0 13.0 1.0 13.0
(**)
15 3.8 5.5 1.0 6.5 1.0 6.5
(**)
50 5.3 7.5 1.0 8.5 1.0 8.5
(*)
(*)
(**)
(**)
(*)
(**)
15
50
15
50
50
50
R
= 1 KΩ
L
R
= 1 KΩ
L
R
= 1 KΩ
L
R
= 1 KΩ
L
R
= 1 KΩ
L
R
= 1 KΩ
L
= tf = 3ns)
r
= 25°C
T
A
-40 to 85°C -55 to 125°C
Min. Typ. Max. Min. Max. Min. Max.
5.4 8.0 1.0 9.5 1.0 9.5
7.9 11.5 1.0 13.0 1.0 13.0
3.6 5.1 1.0 6.0 1.0 6.0
5.1 7.1 1.0 8.0 1.0 8.0
9.5 13.2 1.0 15.0 1.0 15.0
6.1 8.8 1.0 10.0 1.0 10.0
Unit
ns
ns
ns
3/12
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74VHC125
Table 8: Capacitive Characteristics
Test Condition Value
= 25°C
Symbol Parameter
T
A
Min. Typ. Max. Min. Max. Min. Max.
C
C
C
Input Capacitance
IN
Output
OUT
Capacitance
Power Dissipation
PD
Capacitance
610 10 10pF
8pF
16 pF
(note 1)
1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
Table 9: Dynamic Switching Characteristics
Test Condition Value
= 25°C
Symbol Parameter
V
V
Dynamic Low
OLP
Voltage Quiet
OLV
Output (note 1, 2)
Dynamic High
V
IHD
Voltage Input
(note 1, 3)
Dynamic Low
V
ILD
Voltage Input
(note 1, 3)
V
CC
(V)
5.0
= 50 pF
5.0 3.5 V
C
L
5.0 1.5 V
T
A
Min. Typ. Max. Min. Max. Min. Max.
0.3 0.8
-0.8 -0.3
-40 to 85°C -55 to 125°C
= CPD x VCC x fIN + ICC/4 (per c ircuit )
CC(opr)
-40 to 85°C -55 to 125°C
Unit
Unit
V
1) Worst case package.
2) Max number of outp ut s defined as (n). Data inpu t s are driven 0V to 5.0V, (n-1) outputs switc hi ng and one output at GND.
3) Max number of data inputs (n) switching. (n-1) switching 0V to 5.0V. Inputs under test switching: 5.0V to threshold (V
(V
), f=1MHz.
IHD
ILD
), 0V to thresho l d
4/12
Page 5
Figure 3: Test Circuit
t
, t
PLH
PHL
, t
t
PZL
PLZ
t
, t
PZH
PHZ
TEST SWITCH
Open
V
CC
GND
74VHC125
CL =15/50pF or equivalent (i ncludes jig an d probe capac i tance)
= R1 = 1KΩ or equivalent
R
L
R
= Z
of pulse generator (typically 50Ω)
T
OUT
Figure 4: Waveform - Propagation Delays (f=1MHz; 50% duty cycle)
5/12
Page 6
74VHC125
Figure 5: Waveform - Output Enable And Disable Time (f=1MHz; 50% duty cycle)
6/12
Page 7
SO-14 MECHANICAL DATA
74VHC125
DIM.
A 1.35 1.75 0.053 0.069
A1 0.1 0.25 0.004 0.010
A2 1.10 1.65 0.043 0.065
B 0.33 0.51 0.013 0.020
C 0.19 0.25 0.007 0.010
D 8.55 8.75 0.337 0.344
E 3.8 4.0 0.150 0.157
e 1.27 0.050
H 5.8 6.2 0.228 0.244
h 0.25 0.50 0.010 0.020
L 0.4 1.27 0.016 0.050
k0° 8° 0° 8°
ddd 0.100 0.004
MIN. TYP MAX. MIN. TYP. MAX.
mm. inch
0016019D
7/12
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74VHC125
TSSOP14 MECHANICAL DATA
mm. inch
DIM.
MIN. TYP MAX. MIN. TYP. MAX.
A 1.2 0.047
A1 0.05 0.15 0.002 0.004 0.006
A2 0.8 1 1.05 0.031 0.039 0.041
b 0.19 0.30 0.007 0.012
c 0.09 0.20 0.004 0.0089
D 4.9 5 5.1 0.193 0.197 0.201
E 6.2 6.4 6.6 0.244 0.252 0.260
E1 4.3 4.4 4.48 0.169 0.173 0.176
e 0.65 BSC 0.0256 BSC
K0˚ 8˚0˚ 8˚
L 0.45 0.60 0.75 0.018 0.024 0.030
A2
A
A1
b
e
c
K
L
E
D
E1
PIN 1 IDENTIFICATION
8/12
1
0080337D
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74VHC125
Tape & Reel SO-14 MECHANICAL DATA
mm. inch
DIM.
MIN. TYP MAX. MIN. TYP. MAX.
A 330 12.992
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N 60 2.362
T 22.4 0.882
Ao 6.4 6.6 0.252 0.260
Bo 9 9.2 0.354 0.362
Ko 2.1 2.3 0.082 0.090
Po 3.9 4.1 0.153 0.161
P 7.9 8.1 0.311 0.319
9/12
Page 10
74VHC125
Tape & Reel TSSOP14 MECHANICAL DATA
mm. inch
DIM.
MIN. TYP MAX. MIN. TYP. MAX.
A 330 12.992
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N 60 2.362
T 22.4 0.882
Ao 6.7 6.9 0.264 0.272
Bo 5.3 5.5 0.209 0.217
Ko 1.6 1.8 0.063 0.071
Po 3.9 4.1 0.153 0.161
P 7.9 8.1 0.311 0.319
10/12
Page 11
Table 10: Revision History
Date Revisio n Description of Changes
12-Nov-2004 7 Order Codes Revision - pag. 1.
74VHC125
11/12
Page 12
74VHC125
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of use of s uch inf ormati on nor for a ny infr ing eme nt o f p atent s or o ther ri ghts of third parties which may resul t fr om its us e. No lic ens e is gr an ted
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