74VHC374
OCTAL D-TYPE FLIP FLOP
WITH 3 STATE OUTPUTS NON INVERTING
■
■
■
■
■
■
■
■
■
■
HIGH SPEED:
fMAX = 270 MHz (TYP.) at VCC = 5V
LOW POWER DISSIPATION:
ICC = 4 µA (MAX.) at TA=25°C
HIGH NOISE IMMUNITY:
VNIH = VNIL = 28% VCC (MIN.)
POWER DOWN PROTECTION ON INPUTS
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 8 mA (MIN)
BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
OPERATING VOLTAGE RANGE:
VCC(OPR) = 2V to 5.5V
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 374
IMPROVED LATCH-UP IMMUNITY
LOW NOISE: VOLP = 0.9V (MAX.)
SOP
SOP
TSSOP
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T&R
74VHC374MTR
74VHC374TTR
While the (OE) input is low, the 8 outputs will be in
a normal logic state (high or low logic level) and
while high level the outputs will be in a high
impedance state.
The Output control does not affect the internal
operation of flip flops; that is, the old data can be
retained or the new data can be entered even
while the outputs are off. 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 discharge, giving
them 2KV ESD immunity and transient excess
voltage.
)
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DESCRIPTION
The 74VHC374 is an advanced high-speed
CMOS OCTAL D-TYPE FLIP FLOP with 3 STATE
OUTPUTS NON INVERTING fabricated with
sub-micron silicon gate and double-layer metal
wiring C2MOS technology.
These 8 bit D-Type latch are controlled by a clock
input (CK) and an output enable input (OE).
On the positive transition of the clock, the Q
outputs will be set to the logic state that were
setup at the D inputs.
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Table 1: Order Codes
PACKAGE
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TSSOP
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Figure 1: Pin Connection And IEC Logic Symbols
November 2004
Rev. 4
1/14
74VHC374
Figure 2: Input Equivalent Circuit
Table 2: Pin Description
PIN N°
SYMBOL
1
OE
2, 5, 6, 9, 12,
15, 16,19
3, 4, 7, 8, 13,
14, 17, 18
11
10
20
Q0 to Q7
3 State Output Enable
Input (Active LOW)
3-State Outputs
D0 to D7
Data Inputs
CK
GND
VCC
NAME AND FUNCTION
Clock
Ground (0V)
Positive Supply Voltage
)
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Table 3: Truth Table
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INPUTS
OUTPUT
OE
CK
D
H
X
X
L
X
L
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H
O
)
X : Don’t Care
Z : High Impedance
Figure 3: Logic Diagram
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This logic diagram has not be used to estimate propagation delays
2/14
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Q
Z
NO CHANGE
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74VHC374
Table 4: Absolute Maximum Ratings
Symbol
VCC
Parameter
Supply Voltage
VI
DC Input Voltage
VO
DC Output Voltage
IIK
DC Input Diode Current
IOK
DC Output Diode Current
IO
DC Output Current
Unit
-0.5 to +7.0
V
-0.5 to +7.0
V
-0.5 to VCC + 0.5
- 20
V
mA
± 20
mA
ICC or IGND DC VCC or Ground Current
Storage Temperature
Tstg
TL
Value
± 25
mA
± 75
mA
)
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-65 to +150
Lead Temperature (10 sec)
300
°C
°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
Table 5: Recommended Operating Conditions
Symbol
VCC
Unit
0 to 5.5
V
0 to VCC
V
-55 to 125
°C
0 to 100
0 to 20
ns/V
Value
let
Supply Voltage
Input Voltage
VO
Output Voltage
Top
Operating Temperature
dt/dv
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Parameter
VI
O
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Input Rise and Fall Time (note 1) (VCC = 3.3 ± 0.3V)
(VCC = 5.0 ± 0.5V)
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2 to 5.5
V
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(
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1) VIN from 30% to 70% of VCC
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3/14
74VHC374
Table 6: DC Specifications
Test Condition
Symbol
VIH
VIL
VOH
VOL
IOZ
II
ICC
Parameter
High Level Input
Voltage
Low Level Input
Voltage
High Level Output
Voltage
Low Level Output
Voltage
High Impedance
Output Leakage
Current
Input Leakage
Current
Quiescent Supply
Current
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4/14
TA = 25°C
VCC
(V)
Min.
2.0
3.0 to
5.5
2.0
3.0 to
5.5
Typ.
Max.
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
1.5
1.5
1.5
0.7VCC
0.7VCC
0.7VCC
Unit
Max.
V
0.5
0.5
0.5
0.3VCC
0.3VCC
0.3VCC
2.0
IO=-50 µA
1.9
2.0
1.9
1.9
3.0
IO=-50 µA
2.9
3.0
2.9
2.9
4.5
IO=-50 µA
4.4
4.5
4.4
4.4
3.0
IO=-4 mA
2.58
2.48
2.4
4.5
IO=-8 mA
3.94
3.8
2.0
IO=50 µA
0.0
0.1
3.0
IO=50 µA
0.0
0.1
4.5
IO=50 µA
0.0
3.0
IO=4 mA
4.5
IO=8 mA
5.5
VI = VIH or VIL
VO = VCC or GND
0 to
5.5
5.5
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V
3.7
0.1
0.1
0.1
0.1
0.1
0.1
0.44
0.55
0.36
0.44
0.55
±0.25
± 2.5
± 2.5
µA
VI = 5.5V or GND
± 0.1
±1
±1
µA
VI = VCC or GND
4
40
40
µA
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(s
0.1
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0.36
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Value
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74VHC374
Table 7: AC Electrical Characteristics (Input tr = tf = 3ns)
Test Condition
Symbol
Parameter
VCC
(V)
CL
(pF)
tPLH
tPHL
Propagation Delay
Time
CK to Q
3.3(*)
(*)
(**)
tPLZ
tPHZ
tw
ts
th
fMAX
tOSLH
tOSHL
Output Enable
Time
Output Disable
Time
Clock Pulse Width
HIGH or LOW
Setup Time D to CK
HIGH or LOW
Hold Time D to CK
HIGH or LOW
Maximum Clock
Frequency
Output to Output
Skew time (note 1)
TA = 25°C
-55 to 125°C
Max.
Min.
Max.
Min.
Max.
15
8.1
12.7
1.0
15.0
1.0
15.0
50
10.6
16.2
1.0
18.5
1.0
18.5
15
5.4
8.1
1.0
9.5
1.0
9.5
5.0(**)
50
6.9
10.1
1.0
11.5
1.0
11.5
3.3(*)
15
RL = 1KΩ
7.1
11.0
1.0
13.0
1.0
13.0
3.3(*)
50
RL = 1KΩ
9.6
14.5
1.0
16.5
1.0
16.5
5.0(**)
15
RL = 1KΩ
5.1
7.6
1.0
9.0
1.0
9.0
5.0(**)
3.3
Min.
-40 to 85°C
Typ.
5.0
tPZL
tPZH
Value
RL = 1KΩ
6.6
9.6
1.0
11.0
1.0
15
RL = 1KΩ
10.2
14.0
1.0
16.0
1.0
16.0
(*)
50
RL = 1KΩ
6.1
8.8
1.0
10.0
1.0
10.0
3.3
3.3(*)
5.0
5.0(**)
5.0
3.3(*)
)
(s
5.0(**)
3.3(*)
5.0
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(**)
3.3(*)
50
(**)
50
5.0
5.5
5.0
5.0
so
4.5
4.5
3.0
3.0
2.0
2.0
2.0
2.0
2.0
2.0
3.0
b
O
3.3(*)
60
250
60
60
100
270
100
100
od
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11.0
5.5
4.5
5.0(**)
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ns
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50
(*)
3.3
Unit
ns
ns
ns
ns
ns
MHz
1.5
1.5
1.5
1.0
1.0
1.0
ns
(*) Voltage range is 3.3V ± 0.3V
(**) Voltage range is 5.0V ± 0.5V
Note 1: Parameter guaranteed by design. tsoLH = |tpLHm - tpLHn|, tsoHL = |tpHLm - tpHLn|
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Table 8: Capacitive Characteristics
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Symbol
CIN
COUT
CPD
Parameter
Input Capacitance
Output
Capacitance
Power Dissipation
Capacitance
(note 1)
Test Condition
Value
TA = 25°C
Min.
Typ.
Max.
7
10
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
10
Unit
Max.
10
pF
9
pF
32
pF
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. ICC(opr) = CPD x VCC x fIN + ICC/8 (per
Flip-Flop)
5/14
74VHC374
Table 9: Dynamic Switching Characteristics
Test Condition
Symbol
VOLP
Parameter
VIHD
VILD
TA = 25°C
VCC
(V)
Dynamic Low
Voltage Quiet
Output (note 1, 2)
Dynamic High
Voltage Input
(note 1, 3)
Dynamic Low
Voltage Input
(note 1, 3)
VOLV
Value
Min.
5.0
5.0
-0.9
CL = 50 pF
Typ.
Max.
0.6
0.9
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
Unit
Max.
V
-0.6
3.5
5.0
V
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1.5
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1) Worst case package.
2) Max number of outputs defined as (n). Data inputs are driven 0V to 5.0V, (n-1) outputs switching 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 (VILD ), 0V to threshold
(VIHD), f=1MHz.
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Figure 4: Test Circuit
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TEST
SWITCH
O
Open
tPZL, tPLZ
VCC
tPZH, tPHZ
GND
tPLH, tPHL
CL =15/50pF or equivalent (includes jig and probe capacitance)
RL = R1 = 1KΩ or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
6/14
74VHC374
Figure 5: Waveform - Propagation Delays, Setup And Hold Times (f=1MHz; 50% duty cycle)
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Figure 6: Waveform - Output Enable And Disable Times (f=1MHz; 50% duty cycle)
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74VHC374
Figure 7: Waveform - Pulse Width (f=1mhz; 50% Duty Cycle)
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74VHC374
SO-20 MECHANICAL DATA
mm.
DIM.
MIN.
inch
TYP
MAX.
MIN.
TYP.
MAX.
A
2.35
2.65
0.093
0.104
A1
0.1
0.30
0.004
0.012
B
0.33
0.51
0.013
0.020
C
0.23
0.32
0.009
0.013
D
12.60
13.00
0.496
0.512
E
7.4
7.6
0.291
e
1.27
)
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0.299
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P
0.050
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H
10.00
10.65
0.394
h
0.25
0.75
0.010
L
0.4
1.27
k
0°
8°
(s)
ddd
0.100
-O
bs
du
0.419
0.030
0.016
0.050
0°
8°
0.004
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0016022D
9/14
74VHC374
TSSOP20 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
MAX.
A
MIN.
TYP.
MAX.
1.2
A1
0.05
A2
0.8
b
0.047
0.15
0.002
0.004
0.006
1.05
0.031
0.039
0.041
0.19
0.30
0.007
c
0.09
0.20
0.004
D
6.4
6.5
6.6
0.252
E
6.2
6.4
6.6
0.244
E1
4.3
4.4
4.48
0.169
1
e
K
0˚
L
0.45
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let
o
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b
0.60
0.75
s
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P
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0.256
t
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0.260
0.252
0.260
0.173
0.176
0.0256 BSC
0˚
8˚
0.018
0.024
0.030
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A2
A
O
)
8˚
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0.0079
bs
0.65 BSC
)
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0.012
A1
b
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K
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L
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c
D
E1
PIN 1 IDENTIFICATION
1
0087225C
10/14
74VHC374
Tape & Reel SO-20 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
MAX.
A
MIN.
TYP.
MAX.
330
13.2
12.992
C
12.8
D
20.2
0.795
N
60
2.362
T
0.504
0.519
)
s
(
ct
30.4
1.197
Ao
10.8
11
0.425
Bo
13.2
13.4
0.520
Ko
3.1
3.3
0.122
Po
3.9
4.1
0.153
P
11.9
12.1
0.468
)
(s
0.433
ro
P
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let
so
b
O
du
0.528
0.130
0.161
0.476
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11/14
74VHC374
Tape & Reel TSSOP20 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
MAX.
A
TYP.
MAX.
330
13.2
12.992
C
12.8
D
20.2
0.795
N
60
2.362
T
0.504
0.519
)
s
(
ct
22.4
0.882
Ao
6.8
7
0.268
Bo
6.9
7.1
0.272
Ko
1.7
1.9
0.067
Po
3.9
4.1
0.153
P
11.9
12.1
0.468
)
(s
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12/14
MIN.
0.276
ro
P
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let
so
b
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0.280
0.075
0.161
0.476
74VHC374
Table 10: Revision History
Date
Revision
12-Nov-2004
4
Description of Changes
Order Codes Revision - pag. 1.
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13/14
74VHC374
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Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
All other names are the property of their respective owners
© 2004 STMicroelectronics - All Rights Reserved
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14/14
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