MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Low-Voltage CMOS
Octal D-Type Flip-Flop
With 5V-Tolerant Inputs and Outputs
(3-State, Non-Inverting)
The MC74LCX374 is a high performance, non–inverting octal D–type
flip–flop operating from a 2.7 to 3.6V supply. High impedance TTL
compatible inputs significantly reduce current loading to input drivers
while TTL compatible outputs offer improved switching noise
performance. A VI specification of 5.5V allows MC74LCX374 inputs to be
safely driven from 5V devices.
The MC74LCX374 consists of 8 edge–triggered flip–flops with
individual D–type inputs and 3–state true outputs. The buffered clock and
buffered Output Enable (OE) are common to all flip–flops. The eight
flip–flops will store the state of individual D inputs that meet the setup and
hold time requirements on the LOW–to–HIGH Clock (CP) transition. With
the OE LOW, the contents of the eight flip–flops are available at the
outputs. When the OE is HIGH, the outputs go to the high impedance
state. The OE input level does not affect the operation of the flip–flops.
MC74LCX374
LOW–VOLTAGE CMOS
OCTAL D–TYPE FLIP–FLOP
20
1
DW SUFFIX
PLASTIC SOIC
CASE 751D–04
•
•
•
•
•
•
•
•
Designed for 2.7 to 3.6V VCC Operation
5V Tolerant — Interface Capability With 5V TTL Logic
Supports Live Insertion and Withdrawal
IOFF Specification Guarantees High Impedance When VCC = 0V
LVTTL Compatible
LVCMOS Compatible
24mA Balanced Output Sink and Source Capability
20
1
20
1
M SUFFIX
PLASTIC SOIC EIAJ
CASE 967–01
Near Zero Static Supply Current in All Three Logic States (10µA)
Substantially Reduces System Power Requirements
•
Latchup Performance Exceeds 500mA
SD SUFFIX
PLASTIC SSOP
CASE 940C–03
•
ESD Performance: Human Body Model >2000V; Machine Model >200V
20
1
DT SUFFIX
PLASTIC TSSOP
CASE 948E–02
Pinout: 20–Lead
(Top View)
VCC
20
O7
19
D7
18
D6
17
O6
16
O5
15
D5
14
D4
13
O4
12
CP
11
PIN NAMES
Pins
OE
CP
D0–D7
O0–O7
Function
Output Enable Input
Clock Pulse Input
Data Inputs
3–State Outputs
1
OE
2
O0
3
D0
4
D1
5
O1
6
O2
7
D2
8
D3
9
O3
10
GND
11/96
©
Motorola, Inc. 1996
1
REV 3
MC74LCX374
LOGIC DIAGRAM
OE
CP
1
11
nCP
Q
D
5
Q
D
6
Q
D
9
Q
D
nCP
Q
D
15
Q
D
nCP
Q
D
19
Q
D
O7
16
O6
O5
12
O4
O3
O2
O1
2
O0
3
D0
4
D1
nCP
7
D2
nCP
8
D3
nCP
13
D4
14
D5
nCP
17
D6
18
D7
nCP
INPUTS
OE
L
L
L
H
H
H
CP
↑
↑
↑
↑
↑
↑
Dn
l
h
X
X
l
h
OUTPUTS
On
L
H
NC
Z
Z
Z
OPERATING MODE
Load and Read Register
Hold and Read Register
Hold and Disable Outputs
Load Internal Register and Disable Outputs
H = High Voltage Level; h = High Voltage Level One Setup Time Prior to the Low–to–High Clock Transition; L = Low
Voltage Level; l = Low Voltage Level One Setup Time Prior to the Low–to–High Clock Transition; NC = No Change, State
Prior to Low–to–High Clock Transition; X = High or Low Voltage Level and Transitions are Acceptable; Z = High
Impedance State;
↑
= Low–to–High Transition;
↑
= Not a Low–to–High Transition; For ICC Reasons DO NOT FLOAT
Inputs
MOTOROLA
2
LCX DATA
BR1339 — REV 3
MC74LCX374
ABSOLUTE MAXIMUM RATINGS*
Symbol
VCC
VI
VO
Parameter
DC Supply Voltage
DC Input Voltage
DC Output Voltage
Value
–0.5 to +7.0
–0.5
≤
VI
≤
+7.0
–0.5
≤
VO
≤
+7.0
–0.5
≤
VO
≤
VCC + 0.5
IIK
IOK
DC Input Diode Current
DC Output Diode Current
–50
–50
+50
IO
ICC
IGND
TSTG
DC Output Source/Sink Current
DC Supply Current Per Supply Pin
DC Ground Current Per Ground Pin
Storage Temperature Range
±50
±100
±100
–65 to +150
Output in 3–State
Note 1.
VI < GND
VO < GND
VO > VCC
Condition
Unit
V
V
V
V
mA
mA
mA
mA
mA
mA
°C
* Absolute maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions
beyond those indicated may adversely affect device reliability. Functional operation under absolute–maximum–rated conditions is not implied.
1. Output in HIGH or LOW State. IO absolute maximum rating must be observed.
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
VI
VO
IOH
IOL
IOH
IOL
TA
∆t/∆V
Supply Voltage
Input Voltage
Output Voltage
(HIGH or LOW State)
(3–State)
Parameter
Operating
Data Retention Only
Min
2.0
1.5
0
0
0
Typ
3.3
3.3
Max
3.6
3.6
5.5
VCC
5.5
–24
24
–12
12
–40
0
+85
10
Unit
V
V
V
mA
mA
mA
mA
°C
ns/V
HIGH Level Output Current, VCC = 3.0V – 3.6V
LOW Level Output Current, VCC = 3.0V – 3.6V
HIGH Level Output Current, VCC = 2.7V – 3.0V
LOW Level Output Current, VCC = 2.7V – 3.0V
Operating Free–Air Temperature
Input Transition Rise or Fall Rate, VIN from 0.8V to 2.0V,
VCC = 3.0V
DC ELECTRICAL CHARACTERISTICS
TA = –40°C to +85°C
Symbol
VIH
VIL
VOH
Characteristic
HIGH Level Input Voltage (Note 2.)
LOW Level Input Voltage (Note 2.)
HIGH Level Output Voltage
Condition
2.7V
≤
VCC
≤
3.6V
2.7V
≤
VCC
≤
3.6V
2.7V
≤
VCC
≤
3.6V; IOH = –100µA
VCC = 2.7V; IOH = –12mA
VCC = 3.0V; IOH = –18mA
VCC = 3.0V; IOH = –24mA
VOL
LOW Level Output Voltage
2.7V
≤
VCC
≤
3.6V; IOL = 100µA
VCC = 2.7V; IOL= 12mA
VCC = 3.0V; IOL = 16mA
VCC = 3.0V; IOL = 24mA
2. These values of VI are used to test DC electrical characteristics only.
VCC – 0.2
2.2
2.4
2.2
0.2
0.4
0.4
0.55
V
Min
2.0
0.8
Max
Unit
V
V
V
LCX DATA
BR1339 — REV 3
3
MOTOROLA
MC74LCX374
DC ELECTRICAL CHARACTERISTICS
(continued)
TA = –40°C to +85°C
Symbol
II
IOZ
IOFF
ICC
∆I
CC
Characteristic
Input Leakage Current
3–State Output Current
Power–Off Leakage Current
Quiescent Supply Current
Condition
2.7V
≤
VCC
≤
3.6V; 0V
≤
VI
≤
5.5V
2.7
≤
VCC
≤
3.6V; 0V
≤
VO
≤
5.5V;
VI = VIH or V IL
VCC = 0V; VI or VO = 5.5V
2.7
≤
VCC
≤
3.6V; VI = GND or VCC
2.7
≤
VCC
≤
3.6V; 3.6
≤
VI or VO
≤
5.5V
Increase in ICC per Input
2.7
≤
VCC
≤
3.6V; VIH = VCC – 0.6V
Min
Max
±5.0
±5.0
10
10
±10
500
Unit
µA
µA
µA
µA
µA
µA
AC CHARACTERISTICS
(tR = tF = 2.5ns; CL = 50pF; RL = 500Ω)
Limits
TA = –40°C to +85°C
VCC = 3.0V to 3.6V
Symbol
fmax
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
ts
th
tw
tOSHL
tOSLH
Parameter
Clock Pulse Frequency
Propagation Delay
CP to On
Output Enable Time to HIGH and LOW
Levels
Output Disable Time from HIGH and
LOW Levels
Setup TIme, HIGH or LOW Dn to CP
Hold TIme, HIGH or LOW Dn to CP
CP Pulse Width, HIGH or LOW
Output–to–Output Skew
(Note 3.)
Waveform
1
1
2
2
1
1
3
Min
150
1.5
1.5
1.5
1.5
1.5
1.5
2.5
1.5
3.3
1.0
1.0
8.5
8.5
8.5
8.5
7.5
7.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
1.5
3.3
9.5
9.5
9.5
9.5
8.5
8.5
Max
VCC = 2.7V
Min
Max
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
3. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device.
The specification applies to any outputs switching in the same direction, either HIGH–to–LOW (tOSHL) or LOW–to–HIGH (tOSLH); parameter
guaranteed by design.
DYNAMIC SWITCHING CHARACTERISTICS
TA = +25°C
Symbol
VOLP
Characteristic
Dynamic LOW Peak Voltage (Note 4.)
Condition
VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V
Min
Typ
0.8
Max
Unit
V
VOLV
Dynamic LOW Valley Voltage (Note 4.)
VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V
0.8
V
4. Number of outputs defined as “n”. Measured with “n–1” outputs switching from HIGH–to–LOW or LOW–to–HIGH. The remaining output is
measured in the LOW state.
CAPACITIVE CHARACTERISTICS
Symbol
CIN
COUT
CPD
Parameter
Input Capacitance
Output Capacitance
Power Dissipation Capacitance
Condition
VCC = 3.3V, VI = 0V or VCC
VCC = 3.3V, VI = 0V or VCC
10MHz, VCC = 3.3V, VI = 0V or VCC
Typical
7
8
25
Unit
pF
pF
pF
MOTOROLA
4
LCX DATA
BR1339 — REV 3
MC74LCX374
2.7V
2.7V
Dn
OE
1.5V
0V
ts
CP
1.5V
0V
fmax
tPLH, tPHL
VOH
On
1.5V
VOL
WAVEFORM 1 – PROPAGATION DELAYS, SETUP AND HOLD TIMES
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
WAVEFORM 2 – OUTPUT ENABLE AND DISABLE TIMES
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
On
tPZL
1.5V
VOL + 0.3V
GND
tPLZ
th
2.7V
On
1.5V
≈
0V
≈
3.0V
tPZH
tPHZ
1.5V
1.5V
0V
VCC
VOH – 0.3V
2.7V
CP
1.5V
tw
1.5V
0V
2.7V
1.5V
0V
WAVEFORM 3 – PULSE WIDTH
tR = tF = 2.5ns (or fast as required) from 10% to 90%;
Output requirements: VOL
≤
0.8V, VOH
≥
2.0V
tw
CP
1.5V
Figure 1. AC Waveforms
VCC
6V
OPEN
GND
PULSE
GENERATOR
RT
DUT
CL
R1
RL
TEST
tPLH, tPHL
tPZL, tPLZ
Open Collector/Drain tPLH and tPHL
tPZH, tPHZ
SWITCH
Open
6V
6V
GND
CL = 50pF or equivalent (Includes jig and probe capacitance)
RL = R1 = 500Ω or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
Figure 2. Test Circuit
LCX DATA
BR1339 — REV 3
5
MOTOROLA
测试/测量
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