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74AC273
OCTAL D-TYPE FLIP FLOP WITH CLEAR
PRELIMINARY DATA
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HIGH SPEED: fMAX = 190 MHz (TYP.) at VCC = 5V LOW POWER DISSIPATION: ICC = 8 A (MAX.) at TA = 25 oC HIGH NOISE IMMUNITY: VNIH = VNIL = 28% VCC (MIN.) 50 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 273 IMPROVED LATCH-UP IMMUNITY
B M (Plastic Package) (Micro Package) ORDER CODES : 74AC273B 74AC273M operation similar to equivalent Bipolar Schottky 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 independentely of the other inputs . All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage.
DESCRIPTION The AC273 is a high-speed CMOS OCTAL 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
PIN CONNECTION AND IEC LOGIC SYMBOLS
November 1998
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INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
PIN No 1 2, 5, 6, 9, 12, 15, 16, 19 3, 4, 7, 8, 13, 14, 17, 18 11 SYMBOL CLEAR Q0 to Q7 NAME AND FUNCT ION Asyncronous Master Reset (Active LOW) Flip-Flop Outpus
D0 to D7
Data Inputs
CLOCK
Clock Input (LOW-to-HIGH, EdgeTriggered) Ground (0V) Positive Supply Voltage
10 20
GND VCC
TRUTH TABLE
INPUTS CL EAR L H H H
X:Don't Care
OUT PUT S CLO CK X Q L L H Qn
F UNCTIO N CLEAR
D X L H X
NO CHANGE
LOGIC DIAGRAMS
Thislogic diagram has notbe used to esimate propagation delays
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ABSOLUTE MAXIMUM RATINGS
Symbol VCC VI VO IIK IOK IO Tstg TL Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Current Storage Temperature Lead Temperature (10 sec) Parameter Value -0.5 to +7 -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 20 20 50 400 -65 to +150 300 Unit V V V mA mA mA mA
o o
ICC or IGND DC VCC or Ground Current
C 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 VI VO Top dt/dv Supply Voltage Input Voltage Output Voltage Operating Temperature: Input Rise and Fall Time VCC = 3.0, 4.5 or 5.5 V(note 1) Parameter Valu e 2 to 6 0 to VCC 0 to VCC -40 to +85 8 Unit V V V
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C
ns/V
1) VIN from 30% to70%of VCC
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DC SPECIFICATIONS
Symb ol Parameter V CC (V) VIH High Level Input Voltage 3.0 4.5 5.5 VIL Low Level Input Voltage 3.0 4.5 5.5 VOH High Level Output Voltage 3.0 4.5 5.5 3.0 4.5 5.5 VOL Low Level Output Voltage 3.0 4.5 5.5 3.0 4.5 5.5 II ICC IOLD IOHD Input Leakage Current Quiescent Supply Current Dynamic Output Current (note 1, 2) 5.5 5.5 5.5 VI = V IH or V IL
(* )
Test Co nditions Min. VO = 0.1 V or VCC - 0.1 V VO = 0.1 V or VCC - 0.1 V I O =-50 A VI = V IH or V IL
(* )
Valu e T A = 25 oC T yp. 1.5 2.25 2.75 1.5 2.25 2.75 2.9 4.4 5.4 2.56 3.86 4.86 0.002 0.001 0.001 0.1 0.1 0.1 0.36 0.36 0.36 0.1 8 2.99 4.49 5.49 0.9 1.35 1.65 2.9 4.4 5.4 2.46 3.76 4.76 0.1 0.1 0.1 0.44 0.44 0.44 1 80 75 -75 Max. 2.1 3.15 3.85 -40 to 85 o C Min. 2.1 3.15 3.85 0.9 1.35 1.65 Max.
Un it
V
V
IO=-50 A IO=-50 A IO=-12 mA IO=-24 mA IO=-24 mA IO=50 A IO=50 A IO=50 A IO=12 mA IO=24 mA IO=24 mA
V
V
VI = VCC or GND VI = VCC or GND VOLD = 1.65 V max VOHD = 3.85 V min
A A mA mA
1) Maximum test duration 2ms, one output loaded attime 2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50 . (*) All outputs loaded.
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AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 , Input tr = tf =3 ns)
Symb ol Parameter V CC (V) tPLH tPHL tPHL tw tw ts th tREM fMAX Propagation Delay Time CLOCK to Q Propagation Delay Time CLEAR to Q CLEAR pulse Width CLOCK pulse Width Setup Time D to CK HIGH or LOW Hold Time D to CK HIGH or LOW Recovery Time CLEAR to CLOCK Maximum Clock Frequency 3.3(*) 5.0(*) 3.3(*) 5.0(**) 3.3(*) 5.0 3.3(*) 5.0(**) 3.3(*) 5.0(**) 3.3 5.0(**) 3.3(*) 5.0(**) 3.3(*) 5.0
(**) (*) (**)
T est Con ditio n TA Min. 4.0 3.0 4.0 3.0 5.5 4.0 5.5 4.0 5.5 4.0 1.5 1.5 4.0 3.0 90 140
Valu e = 25 oC -40 to T yp. Max. Min. 8.0 12.5 3.0 5.5 9.0 2.5 8.5 6.5 13.0 10.0 3.0 2.5 6.0 4.5 6.0 4.5 6.0 4.5 1.5 1.5 4.5 3.0 75 190 125
Un it 85 o C Max. 14.0 10.0 14.0 11.0
ns ns ns ns ns ns ns MHz
*) Voltage range is 3.3V 0.3V (**) Voltage range is 5V 0.5V
CAPACITIVE CHARACTERISTICS
Symb ol Parameter V CC (V) C IN CPD Input Capacitance Power Dissipation Capacitance (note 1) 5.0 5.0 fIN = 10 MHz Test Co nditions
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Valu e -40 to 85 C T A = 25 C Min. T yp. Max. Min. Max. 4 TBD
o
Un it
pF pF
1) CPD isdefined as the value of the IC'sinternal equivalent capacitance which is calculated fromthe operating current consumption without load. (Referto Test Circuit).Average operting current can be obtained by the following equation. ICC(opr) = CPD * VCC * fIN + ICC/n(per circuit)
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TEST CIRCUIT
CL = 50 pF or equivalent (includes jigand probe capacitance) RL = R1 = 500 orequivalent RT = ZOUT of pulse generator (typically 50)
WAVEFORM 1: PROPAGATION DELAYS, SETUP AND HOLD TIMES (f=1MHz; 50% duty cycle)
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WAVEFORM 2: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
WAVEFORM 3: RECOVERY TIME (f=1MHz; 50% duty cycle)
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Plastic DIP-20 (0.25) MECHANICAL DATA
mm MIN. a1 B b b1 D E e e3 F I L Z 3.3 1.34 8.5 2.54 22.86 7.1 3.93 0.130 0.053 0.254 1.39 0.45 0.25 25.4 0.335 0.100 0.900 0.280 0.155 1.65 TYP. MAX. MIN. 0.010 0.055 0.018 0.010 1.000 0.065 inch TYP. MAX.
DIM.
P001J
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SO-20 MECHANICAL DATA
DIM. MIN. A a1 a2 b b1 C c1 D E e e3 F L M S 7.40 0.50 12.60 10.00 1.27 11.43 7.60 1.27 0.75 8 (max.) 0.291 0.19 13.00 10.65 0.35 0.23 0.50 45 (typ.) 0.496 0.393 0.050 0.450 0.299 0.050 0.029 0.512 0.419 0.10 mm TYP. MAX. 2.65 0.20 2.45 0.49 0.32 0.013 0.009 0.020 0.004 MIN. inch TYP. MAX. 0.104 0.007 0.096 0.019 0.012
P013L
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Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 1998 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. http://www.st.com .
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