SGS Thomson Microelectronics 74VHCT574A Datasheet
WITH 3 STATE OUTPUT NON INVERTING
■ HIGHSPEED:
=180MHz(TYP.)at VCC=5V
f
MAX
■ LOWPOWERDISSIPATION:
=4 µA (MAX.)at TA=25oC
I
CC
■ COMPATIBLEWITHTTLOUTPUTS:
V
=2V(MIN),VIL=0.8V(MAX)
IH
■ POWERDOWNPROTECTIONON INPUTS&
OUTPUTS
■ SYMMETRICALOUTPUTIMPEDANCE:
|=IOL=8 mA(MIN)
|I
OH
■ BALANCEDPROPAGATIONDELAYS:
t
≅ t
PLH
PHL
■ OPERATINGVOLTAGERANGE:
V
(OPR)= 4.5Vto 5.5V
CC
■ PINANDFUNCTION COMPATIBLEWITH
74SERIES574
■ IMPROVEDLATCH-UP IMMUNITY
■ LOWNOISEV
DESCRIPTION
The 74VHCT574A is an advanced high-speed
CMOS OCTAL D-TYPE FLIP FLOP with 3
STATE OUTPUT NON INVERTING fabricated
with sub-micron silicon gate and double-layer
metalwiring C
This 8 bit D-Type flip-flop is controlled by a clock
input (CK) and an output enable input (OE).
On the positive transition of the clock, the Q
=0.9V(Max.)
OLP
2
MOStechnology.
74VHCT574A
OCTAL D-TYPE FLIP FLOP
M
(Micro Package)
(TSSOPPackage)
ORDERCODES :
74VHCT574AM 74VHCT574AT
outputs will be set to logic states that were setup
at the D inputs.
While the OE input is low, the 8 outputswill be in
a normal logic state (high or low logic level) and,
while high level, the outputs will be in a high
impedancestate.
The output control does not affect the internal
operation of flip flop; that is, the old data can be
retained or the new data can be entered even
whilethe outputsare off.
Power down protection is provided on all inputs
and outputs and 0 to 7V can be accepted on
inputs with no regard to the supply voltage. This
devicecan be used to interface5V to 3V.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
T
PIN CONNECTION AND IEC LOGIC SYMBOLS
August 1999
1/10
74VHCT574A
INPUT EQUIVALENTCIRCUIT PIN DESCRIPTION
PI N No SYMB OL NAME AND FUNCT I O N
1 OE 3 State Output Enable
2, 3, 4,
5, 6, 7,
8, 9
12, 13, 14,
15, 16, 17,
18, 19
11 CLOCK Clock Input (LOW to
10 GND Ground (0V)
20 V
TRUTH TABLE
INPUTS OUTPUTS
OE CK D Q
HXXZ
L X NO CHANGE
LLL
LHH
X:Don’tCare
Z: High Impedance
D0 to D7 Data Inputs
Q0 to Q7 3 State Outputs
CC
Input (Active LOW)
HIGH, edge triggered)
Positive Supply Voltage
LOGICDIAGRAM
2/10
74VHCT574A
ABSOLUTE MAXIMUM RATINGS
Symb o l Paramet er Value U n i t
V
V
V
V
I
I
OK
I
or I
I
CC
T
T
AbsoluteMaximumRatingsarethosevalues beyond whichdamage tothedevicemayoccur. Functionaloperationunderthese condition isnotimplied.
1)Outputin OFFState
2)HighorLowState
RECOMMENDEDOPERATINGCONDITIONS
Symb o l Paramet er Value Unit
V
V
V
V
T
dt/dv
1)Outputin OFFState
2)HighorLowState
from0.8Vto 2V
3)V
IN
Supply Voltage -0.5 to +7.0 V
CC
DC Input Voltage -0.5 to +7.0 V
I
DC Output Voltage (see note 1) -0.5 to +7.0 V
O
DC Output Voltage (see note 2) -0.5 to VCC+ 0.5 V
O
DC Input Diode Current - 20 mA
IK
DC Output Diode Current
DC Output Current
O
DC VCCor Ground Current ± 50 mA
GND
Storage Temperature -65 to +150
stg
Lead Temperature (10 sec) 300
L
Supply Voltage 4.5 to 5.5 V
CC
Input Voltage 0 to 5.5 V
I
Output Voltage (see note 1) 0 to 5.5 V
O
Output Voltage (see note 2) 0 to V
O
Operating Temperature -40 to +85
op
Input Rise and Fall Time (see note 3) (V
=5.0±0.5V)
CC
20 mA
±
25 mA
±
CC
0 to 20 ns/V
o
C
o
C
V
o
C
3/10
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