74LCX374
OCTAL D-TYPE FLIP FLOP NON-INVERTING (3-STATE)
WITH 5V TOLERANT INPUTS AND OUTPUTS
■ 5V TOLERANT INPUTS AND OUTPUTS
■ HIGH SPEED:
f
= 150 MHz (MIN.) at VCC = 3V
MAX
■ POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
| = IOL = 24mA (MIN) at VCC = 3V
OH
■ PCI BUS LEVELS GUARANTEED AT 24 mA
■ BALANCED PROPAGATION DELAYS:
t
≅ t
PLH
■ OPERATING VOLTAGE RANGE:
V
CC
PHL
(OPR) = 2.0V to 3.6V (1.5V Data
Retention)
■ PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 374
■ LA TCH-UP PERFORMANCE EXCEEDS
500mA (JESD 17)
■ ESD PERFORMANCE:
HBM > 2000V (MIL STD 883 method 3015);
MM > 200V
DESCRIPTION
The 74LCX374 is a low voltage CMOS OCTAL
D-TYPE FLIP FLOP with 3 STATE OUTPUT
NON-INVERTING fabricated with sub-micron
silicon gate and double-layer metal wiring C
2
MOS
technology. It is ideal for low power and high
speed 3.3V applications; it can be interfaced to 5V
signal environment for both inputs and outputs.
These 8 bit D-Type flip-flops are controlled by a
clock input (CK) and an output enable input (OE
).
On the positive transition of the clock, the Q
Figure 1: Pin C onnection And I EC Logic Symbol s
TSSOPSOP
Table 1: Order Codes
PACKAGE T & R
SOP 74LCX374MTR
TSSOP 74LCX374TTR
outputs will be set to the logic state that were
setup at the D inputs.
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.
It has same speed performance at 3.3V than 5V
AC/ACT family, combined with a lower power
consumption.
All inputs and outputs are equipped with
protection circuits against static disc harge, giving
them 2KV ESD immunity and transient excess
voltage.
Rev. 4
1/13September 2004
74LCX374
Figure 2: Input An d Output Equival e n t Ci rcui t
Table 2: Pin Description Table 3: Truth Table
PIN N° SYMBOL NAME AND FUNCTION
1OE3 State Output Enable
2, 5, 6, 9, 12,
15, 16, 19
3, 4, 7, 8, 13,
14, 17, 18
1 1 CK Clock Input (LOW to HIGH,
10 GND Ground (0V)
20 V
Q0 to Q7 3-State Outputs
D0 to D7 Data Inputs
CC
Input (Active LOW)
edge triggered)
Positive Supply Voltage
Figure 3: Logic Diagram
INPUT OUTPUT
OE
HXX Z
L X NO CHANGE
LLL
LHH
X : Don’t Care
Z : High Impedance
CK D Q
This logi c di agram has not be used to estim ate propaga tion delays
2/13
74LCX374
Table 4: Absolute Maximum Ratings
Symbol Parameter Value Unit
V
V
V
V
I
I
OK
I
I
CC
I
GND
T
T
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
absolute maximum rating must be observed
1) I
O
< GND
2) V
O
Table 5: Recommended Operating Conditions
Supply Voltage
CC
DC Input Voltage
I
DC Output Voltage (OFF State)
O
DC Output Voltage (High or Low State) (note 1) -0.5 to VCC + 0.5
O
DC Input Diode Current
IK
DC Output Diode Current (note 2)
DC Output Current
O
DC Supply Current per Supply Pin
DC Ground Current per Supply Pin
Storage Temperature
stg
Lead Temperature (10 sec)
L
-0.5 to +7.0 V
-0.5 to +7.0 V
-0.5 to +7.0 V
V
- 50 mA
- 50 mA
± 50 mA
± 100 mA
± 100 mA
-65 to +150 °C
300 °C
Symbol Parameter Value Unit
I
I
V
V
V
V
OH
OH
T
Supply Voltage (note 1)
CC
Input Voltage
I
Output Voltage (OFF State)
O
Output Voltage (High or Low State) 0 to V
O
, I
High or Low Level Output Current (VCC = 3.0 to 3.6V)
OL
, I
High or Low Level Output Current (VCC = 2.7V)
OL
Operating Temperature
op
2.0 to 3.6 V
0 to 5.5 V
0 to 5.5 V
CC
± 24 mA
± 12 mA
-55 to 125 °C
dt/dv Input Rise and Fall Time (note 2) 0 to 10 ns/V
1) Truth T abl e guarante ed: 1.5V to 3.6V
from 0.8V to 2V at VCC = 3.0V
2) V
IN
V
3/13
74LCX374
Table 6: DC Specifications
Test Condition Value
Symbol Parameter
V
V
V
V
I
I
OZ
High Level Input
IH
Voltage
Low Level Input
IL
Voltage
High Level Output
OH
Voltage
Low Level Output
OL
Voltage
Input Leakage
I
I
Current
Power Off Leakage
off
Current
High Impedance
Output Leakage
Current
I
CC
∆I
Quiescent Supply
Current
ICC incr. per Input
CC
V
CC
(V)
2.7 to 3.6
2.7 to 3.6
2.7
3.0
2.7 to 3.6
2.7
3.0
2.7 to 3.6
0
2.7 to 3.6
2.7 to 3.6
2.7 to 3.6
-40 to 85 °C -55 to 125 °C
Min. Max. Min. Max.
2.0 2.0 V
0.8 0.8 V
IO=-100 µAVCC-0.2 VCC-0.2
I
=-12 mA
O
=-18 mA
I
O
=-24 mA
I
O
IO=100 µA
I
=12 mA
O
I
=16 mA
O
=24 mA
I
O
= 0 to 5.5V
V
I
or VO = 5.5V
V
I
= VIH or V
V
I
VO = 0 to V
VI = VCC or GND
V
or VO= 3.6 to 5.5V
I
VIH = VCC - 0.6V
IL
CC
2.2 2.2
2.4 2.4
2.2 2.2
0.2 0.2
0.4 0.4
0.4 0.4
0.55 0.55
± 5 ± 5 µA
10 10 µA
± 5 ± 5 µA
10 10
± 10 ± 10
500 500 µA
Unit
V
V
µA
Table 7: Dynamic Switching Characteristics
Test Condition Value
= 25 °C
Symbol Parameter
V
CC
(V)
V
OLP
V
OLV
1) Number of outputs defined as "n". Measured wi t h "n-1" output s switching from HIGH to LO W or LOW to HIGH. The remaining output is
measur ed i n the LOW state.
Dynamic Low Level Quiet
Output (note 1)
3.3
= 50pF
C
L
V
= 0V, VIH = 3.3V
IL
T
A
Min. Typ. Max.
0.8
-0.8
Unit
V
4/13
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