STMICROELECTRONICS 74AC174

74AC174
HEX D-TYPE FLIP FLOP WITH CLEAR
PRELIMINARY DATA
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HIGH SPEED:
fMAX =125 MHz (TYP.) at VCC = 5V
LOW POWER DISSIPATION:
ICC = 8 µA (MAX.) at TA = 25 oC
HIGH NOISE IMMUNITY:
VNIH = VNIL = 28% VCC (MIN.)
50Ω TRANSMISSION LINE DRIVING
CAPABILITY
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 24 mA (MIN)
BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
OPERATING VOLTAGE RANGE:
VCC (OPR) = 2V to 6V
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 174
IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The AC174 is an high-speed CMOS HEX
D-TYPE FLIP FLOP WITH CLEAR fabricated
with sub-micron silicon gate and double-layer
metal wiring C2MOS technology. It is ideal for low
power applications mantaining high speed
operation similar to eqivalent Bipolar Schottky
B
M
(Plastic Package)
(Micro Package)
ORDER CODES :
74AC174B
74AC174M
TTL.
Information signals applied to D inputs are
transfered to the Q output on the positive going
edge of the clock pulse.
When the CLEAR input is held low, the Q outputs
are held low independentelyof the other inputs .
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
May 1997
1/10
74AC174
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
SYMBOL
1
CLEAR
NAME AND F UNCTIO N
2, 5, 7, 10,
12, 15
Q0 to Q5
Flip-Flop Outpus
3, 4, 6, 11,
13, 14
D0 to D5
Data Inputs
9
CLOCK
Clock Input (LOW-to-HIGH,
Edge- Triggered)
8
GND
Ground (0V)
16
VCC
Positive Supply Voltage
Asyncronous Master Reset
(Active LOW)
TRUTH TABLE
INPUTS
O UTPUTS
CL EAR
D
CLOCK
Q
X
L
L
X
H
L
L
H
H
H
H
X
Qn
X: Don’t Care
LOGIC DIAGRAM
This logic diagram has not be used to estimate propagation delays
2/10
FUNCTION
CLEAR
NO CHANGE
74AC174
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
Parameter
Supply Voltage
Value
Unit
-0.5 to +7
V
VI
DC Input Voltage
-0.5 to VCC + 0.5
V
VO
DC Output Voltage
-0.5 to VCC + 0.5
V
IIK
DC Input Diode Current
± 20
mA
IOK
DC Output Diode Current
± 20
mA
IO
DC Output Current
± 50
mA
± 300
mA
ICC or IGND DC VCC or Ground Current
Tstg
Storage Temperature
TL
Lead Temperature (10 sec)
-65 to +150
o
C
300
o
C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
Parameter
Supply Voltage
Value
Un it
2 to 6
V
V
VI
Input Voltage
0 to VCC
VO
Output Voltage
0 to VCC
Top
dt/dv
Operating Temperature:
Input Rise and Fall Time VCC = 3.0, 4.5 or 5.5 V(note 1)
-40 to +85
8
V
o
C
ns/V
1) VIN from 30% to 70% of VCC
3/10
74AC174
DC SPECIFICATIONS
Symbol
Parameter
Test Con dition s
VIH
High Level Input Voltage
3.0
4.5
VO = 0.1 V or
VCC - 0.1 V
5.5
VIL
Low Level Input Voltage
3.0
4.5
Value
o
High Level Output Voltage
Typ.
2.1
1.5
2.1
3.15
2.25
3.15
3.85
2.75
VO = 0.1 V or
VCC - 0.1 V
3.0
4.5
Min .
Max.
V
3.85
1.5
0.9
0.9
2.25
1.35
1.35
2.75
1.65
2.9
2.99
2.9
IO=-50 µA
4.4
4.49
4.4
5.49
5.4
2.56
2.46
4.5
IO=-24 mA
3.86
3.76
5.5
IO=-24 mA
4.86
3.0
IO=50 µA
0.002
0.1
0.1
IO=50 µA
0.001
0.1
0.1
IO=50 µA
0.001
0.1
0.1
4.5
5.5
(*)
VI =
V IH or
V IL
5.4
V
4.76
IO=12 mA
0.36
0.44
4.5
IO=24 mA
0.36
0.44
5.5
IO=24 mA
0.36
0.44
3.0
V
1.65
I O=-50 µA
IO=-50 µA
3.0
Low Level Output Voltage
Max.
IO=-12 mA
5.5
VOL
(*)
VI =
V IH or
V IL
-40 to 85 C
Min.
5.5
VOH
Unit
o
T A = 25 C
V CC
(V)
V
Input Leakage Current
5.5
VI = VCC or GND
±0.1
±1
µA
ICC
Quiescent Supply Current
5.5
VI = VCC or GND
8
80
µA
IOLD
Dynamic Output Current
(note 1, 2)
5.5
VOLD = 1.65 V max
75
mA
VOHD = 3.85 V min
-75
mA
II
IOHD
1) Maximum test duration 2ms, one output loaded at time
2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50 Ω.
(*) All outputs loaded.
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74AC174
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = t f =3 ns)
Symbol
Parameter
T est Cond ition
Value
3.3(*)
tPLH
tPHL
Propagation Delay Time
CK to Q
5.0
tPLH
tPHL
Propagation Delay Time
CLR to Q
3.3
5.0(**)
twL
CLR pulse Width, LOW
CK pulse Width
ts
Setup Time Q to CK HIGH
or LOW
o
(**)
1.5
6.0
8.0
9.0
(*)
1.5
1.5
9.0
7.0
11.0
9.0
12.0
10.0
3.3(*)
1.0
5.5
7.0
(**)
1.0
5.0
5.0
3.3
5.0(**)
3.3(*)
(*)
1.0
1.0
2.5
5.5
5.0
6.5
7.0
5.0
7.0
(**)
2.0
5.0
5.5
(*)
5.0
tw
Unit
o
-40 to 85 C
T A = 25 C
Min. Typ. Max. Min . Max.
1.5
8.5
11.0
12.0
V CC
(V)
5.0
th
Hold Time Q to CK HIGH
or LOW
3.3
5.0(**)
1.0
0.5
3.0
3.0
3.0
3.0
tREM
Recovery Time CLR to CK
3.3(*)
0
2.5
2.5
(**)
0
2.0
2.0
5.0
fMAX
Maximum Clock Frequency
(*)
3.3
5.0(**)
90
100
100
125
70
100
ns
ns
ns
ns
ns
ns
ns
MHz
(*) Voltage range is 3.3V ± 0.3V
(**) Voltage range is 5V ± 0.5V
CAPACITIVE CHARACTERISTICS
Symbol
Parameter
Test Con dition s
CIN
Input Capacitance
5.0
C PD
Power Dissipation
Capacitance (note 1)
5.0
Value
o
T A = 25 C
V CC
(V)
Min.
fIN = 10 MHz
Typ.
Max.
Unit
o
-40 to 85 C
Min .
Max.
4
pF
TBD
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 operting current can be obtained by the following equation. ICC(opr) = CPD • VCC • fIN +ICC/n (per circuit)
5/10
74AC174
TEST CIRCUIT
CL = 50 pF or equivalent (includes jig and probe capacitance)
RL = R1 = 500Ω or equivalent
RT =ZOUT of pulse generator (typically 50Ω)
WAVEFORM 1: PROPAGATION DELAYS, SETUP AND HOLD TIMES (f=1MHz; 50% duty cycle)
6/10
74AC174
WAVEFORM 2: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
WAVEFORM 3: RECOVERY TIME (f=1MHz; 50% duty cycle)
7/10
74AC174
Plastic DIP-16 (0.25) MECHANICAL DATA
mm
DIM.
MIN.
a1
0.51
B
0.77
TYP.
inch
MAX.
MIN.
TYP.
MAX.
0.020
1.65
0.030
0.065
b
0.5
0.020
b1
0.25
0.010
D
20
0.787
E
8.5
0.335
e
2.54
0.100
e3
17.78
0.700
F
7.1
0.280
I
5.1
0.201
L
Z
3.3
0.130
1.27
0.050
P001C
8/10
74AC174
SO-16 MECHANICAL DATA
mm
DIM.
MIN.
TYP.
A
a1
inch
MAX.
MIN.
TYP.
1.75
0.1
0.068
0.2
a2
MAX.
0.004
0.007
1.65
0.064
b
0.35
0.46
0.013
0.018
b1
0.19
0.25
0.007
0.010
C
0.5
0.019
c1
45 (typ.)
D
9.8
E
5.8
10
0.385
6.2
0.228
0.393
0.244
e
1.27
0.050
e3
8.89
0.350
F
3.8
4.0
0.149
0.157
G
4.6
5.3
0.181
0.208
L
0.5
1.27
0.019
0.050
M
S
0.62
0.024
8 (max.)
P013H
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74AC174
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.
 1997 SGS-THOMSON Microelectronics - Printed in Italy - All Rights Reserved
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