Datasheet 74VHC374SJX, 74VHC374SJ, 74VHC374N, 74VHC374MX, 74VHC374MTCX Datasheet (Fairchild Semiconductor)
...Page 1
November 1992
Revised April 1999
74VHC374 Octal D-Type Flip-Flop with 3-STATE Outputs
© 1999 Fairchild Semiconductor Corporation DS011538.prf www.fairchildsemi.com
74VHC374
Octal D-Type Flip-Flop with 3-STATE Outputs
General Description
The VHC374 is an advanced high speed CMOS octal fli pflop with 3-STATE output fabricated with silicon gate CMOS
technology. It achieves the high speed opera tion simil ar to
equivalent Bipolar Schottky TTL while maintaining the
CMOS low power dissipation. This 8-bit D-type flip-flop is
controlled by a clock input (CP ) and an ou tpu t ena ble i np ut
(OE
). When the OE i nput is HIGH, the e ight outpu ts are in
a HIGH impe dance state.
An input protection circuit en sures that 0V to 7V can be
applied to the input pins without re gard to the supply voltage. This device can be used to interface 5V to 3V systems
and two supply systems such as ba ttery back up . This circuit prevents device destruction due to m i sma tche d s upp l y
and input voltages.
Features
■ High Speed: tPD = 5.4 ns (typ) at VCC = 5V
■ High noise immunity: V
NIH
= V
NIL
= 28% VCC (Min)
■ Power down protection is provided on all inputs
■ Low power dissipation: I
CC
= 4 µA (Max) @ TA = 25°C
■ Pin and function compatible with 74HC374
Ordering Code:
Surface mount pack ages are also available on Tape and Reel. Specify by appending the s uffix let te r “X” to the ordering code .
Logic Symbol
IEEE/IEC
Connection Diagram
Pin Descriptions
Order Number Package Number Package Description
74VHC374M M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide
74VHC374SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74VHC374MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74VHC374N N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Pin Names Description
D
0–D7
Data Inputs
CP Clock Pulse Input
OE
3-STATE Output Enable Input
O
0–O7
3-STATE Outputs
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74VHC374
Functional Description
The VHC374 consists of eight edge-triggered flip-flops with
individual D-type inputs and 3-STATE true outputs. The
buffered clock and buffered Outp ut Enable are com mon to
all flip-flops. The eight flip-flops will store th e state of their
individual D inputs that meet the setup and hold time
requirements on the LOW-to-HIGH Clock (CP) transition.
With the Output Enable (OE
) LOW, the contents of the
eight flip-flops are available at the outputs. When the OE
is
HIGH, the outputs go to th e high impeda nce state. Op eration of the OE
input does not affect t he state of the flip-
flops.
Tr uth Table
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
= LOW-to-HIGH Transition
Logic Diagram
Please note that this diagram is provided o nly f or t he understanding of lo gic operations and shou ld not be used to estimate propagation delays.
Inputs Outputs
D
n
CP OE O
n
H
LH
L
LL
XXH Z
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74VHC374
Absolute Maximum Ratings(Note 1) Recommended Operating
Conditions
(Note 2)
Note 1: Absolute Maximum Ratings are valu es beyond whic h the device
may be damaged or ha ve its useful life impaire d. The datab ook specifications should be met, without exception, to ensure that the system design is
reliable over its p ower supp ly, temperature, and o utput/input loading variables. Fairchild does not recommend operation outside databook specifications.
Note 2: Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Noise Characteristics
Note 3: Parameter gu aranteed by design.
Supply Voltage (VCC) −0.5V to +7.0V
DC Input Voltage (V
IN
) −0.5V to +7.0V
DC Output Voltage (V
OUT
) −0.5V to VCC + 0.5V
Input Diode Current (I
IK
) −20 mA
Output Diode Current ±20 mA
DC Output Current (I
OUT
) ±25 mA
DC V
CC
/GND Current (ICC) ±75 mA
Storage Temperature (T
STG
) −65°C to +150°C
Lead Temperature (T
L
)
(Soldering, 10 seco nds) 260°C
Supply Voltage (V
CC
)2.0V to +5.5V
Input Voltage (V
IN
)0V to +5.5V
Output Voltage (V
OUT
)0V to V
CC
Operating Temperature (T
OPR
) −40°C to +85°C
Input Rise and Fall Time (t
r
, tf)
V
CC
= 3.3V ± 0.3V 0 ns/V – 100 ns/V
V
CC
= 5.0V ± 0.5V 0 ns/V – 20 ns/V
Symbol Parameter
V
CC
(V)
TA = 25°CT
A
= −40°C to +85°C
Units Conditions
Min Typ Max Min Max
V
IH
HIGH Level Input 2.0 1.50 1.50
V
Voltage 3.0 − 5.5 0.7 V
CC
0.7 V
CC
V
IL
LOW Level Input Voltage 2.0 0.50 0.50
V
3.0 − 5.5 0.3 V
CC
0.3 V
CC
V
OH
HIGH Level Output 2.0 1.9 2.0 1.9 VIN = VIHIOH = −50 µA
Voltage 3.0 2.9 3.0 2.9 V or V
IL
4.5 4.4 4.5 4.4
3.0 2.58 2.48
V
IOH = −4 mA
4.5 3.94 3.80 IOH = −8 mA
V
OL
LOW Level Output 2.0 0.0 0.1 0.1 VIN = VIHIOL = 50 µA
Voltage 3.0 0.0 0.1 0.1 V or V
IL
4.5 0.0 0.1 0.1
3.0 0.36 0.44
V
IOL = 4 mA
4.5 0.36 0.44 IOL = 8 mA
I
OZ
3-STATE Output 5.5 ±0.25 ±2.5 µAVIN = VIH or V
IL
Off-State Current V
OUT
= VCC or GND
I
IN
Input Leakage Current 0 − 5.5 ±0.1 ±1.0 µAVIN = 5.5V or GND
I
CC
Quiescent Supply Current 5.5 4.0 40.0 µAVIN = VCC or GND
Symbol Parameter
V
CC
(V)
TA = 25°C
Units Conditions
Typ Limits
V
OLP
(Note 3)
Quiet Output Maximum Dynamic V
OL
5.0 0.6 0.9 V CL = 50 pF
V
OLV
(Note 3)
Quiet Output Minimum Dynamic V
OL
5.0 −0.6 −0.9 V CL = 50 pF
V
IHD
(Note 3)
Minimum HIGH Level Dynamic Input Voltage 5.0 3.5 V CL = 50 pF
V
ILD
(Note 3)
Maximum LOW Level Dynamic Input Voltage 5.0 1.5 V CL = 50 pF
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74VHC374
AC Electrical Characteristics
Note 4: Paramete r guaranteed by desig n. t
OSLH
= |t
PLH max
− t
PLH min
|; t
OSHL
= |t
PHL max
− t
PHL min
|
Note 5: C
PD
is defined as the value of the internal equivalent capacitance w hic h is calculated from t he operating current co ns umption without load. Average
operating curren t can be obtained by the eq uation: I
CC
(opr.) = CPD * VCC * fIN + ICC/8 (per F/F). The total CPD when n pcs. of the Octal D Flip-Flop operates
can be calculated by th e equation: C
PD
(total) = 20 + 12n.
AC Operating Requirements
Symbol Parameter
V
CC
(V)
TA = 25°CT
A
= −40°C to +85°C
Units Conditions
Min Typ Max Min Max
t
PLH
Propagation Delay Time 3.3 ± 0.3 8.1 12.7 1.0 15.0
ns
CL = 15 pF
t
PHL
(CP to On) 10.6 16.2 1.0 18.5 CL = 50 pF
5.0 ± 0.5 5.4 8.1 1.0 9.5
ns
CL = 15 pF
6.910.11.011.5 CL = 50 pF
t
PZL
3-STATE Output 3.3 ± 0.3 7.1 11.0 1.0 13.0
ns
RL = 1 kΩ CL = 15 pF
t
PZH
Enable Time 9.6 14.5 1.0 16.5 CL = 50 pF
5.0 ± 0.5 5.1 7.6 1.0 9.0
ns
CL = 15 pF
6.6 9.6 1.0 11.0 CL = 50 pF
t
PLZ
3-STATE Output 3.3 ± 0.3 10.2 14.0 1.0 16.0
ns
RL = 1 kΩ CL = 50 pF
t
PHZ
Disable Time 5.0 ± 0.5 6.1 8.8 1.0 10.0 CL = 50 pF
t
OSLH
Output to Output Skew 3.3 ± 0.3 1.5 1.5
ns
(Note 4) CL = 50 pF
t
OSHL
5.0 ± 0.5 1.0 1.0 CL = 50 pF
f
MAX
Maximum Clock Frequency 3.3 ± 0.3 80 130 70
MHz
CL = 15 pF
55 85 50 CL = 50 pF
5.0 ± 0.5 130 185 110 CL = 15 pF
85 120 75 CL = 50 pF
C
IN
Input Capacitance 4 10 10 pF VCC = Open
C
OUT
Output Capacitance 6 pF VCC = 5.0V
C
PD
Power Dissipation 32 pF (Note 5)
Capacitance
Symbol Parameter
V
CC
(V)
TA = 25°CT
A
= −40°C to +85°C
Units
Min Typ Max Min Max
tW(H) Minimum Pulse Width (CP) 3.3 ± 0.3 5.0 5.5
ns
tW(L) 5.0 ± 0.5 5.0 5.0
t
S
Minimum Set-Up Time 3.3 ± 0.3 4.5 4.5
ns
5.0 ± 0.5 3.0 3.0
t
H
Minimum Hold Time 3.3 ± 0.3 2.0 2.0 ns
5.0 ± 0.5 2.0 2.0
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74VHC374
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide
Package Number M20B
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M20D
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74VHC374
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Package Number MTC20
Page 7
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.
74VHC374 Octal D-Type Flip-Flop with 3-STATE Outputs
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are dev ic es or syste ms
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided i n the labe li ng, can be re asonably expected to result in a significant injury to the
user.
2. A critical component in any componen t of a life s uppor t
device or system whose failu re to perform can b e reasonably expected to c ause th e fa i lure of the li fe s upp or t
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Package Number N20A
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