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74AC374
OCTAL D-TYPE FLIP FLOP WITH 3 STATE OUTPUT NON INVERTING
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HIGH SPEED: fMAX = 270 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 374 IMPROVED LATCH-UP IMMUNITY
B M (Plastic Package) (Micro Package) ORDER CODES : 74AC374B 74AC374M clock input (CK) and an output enable input (OE). On the positive transition of the clock, the Q 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. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage.
DESCRIPTION The AC374 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 metal wiring C2MOS technology. It is ideal for low power applications mantaining high speed operation similar to equivalent Bipolar Schottky TTL. These 8 bit D-Type flip-flops are controlled by a PIN CONNECTION AND IEC LOGIC SYMBOLS
April 1997
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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 10 20 SYMBOL OE Q0 to Q7 NAME AND F UNCTIO N 3 State Output Enable Input (Active LOW) 3 State Outputs
D0 to D7
Data Inputs
CLOCK GND VCC
Clock Input (LOW to HIGH, edge triggered) Ground (0V) Positive Supply Voltage
TRUTH TABLE
INPUT S OE H L L L CK X D X X L H OUT PUT S Q Z NO CHANGE L H
LOGIC DIAGRAM
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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 Value 2 to 6 0 to VCC 0 to VCC -40 to +85 8 Un it V V V
o
C
ns/V
1) VIN from 30% to 70% of VCC
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DC SPECIFICATIONS
Symbol 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 IOZ Input Leakage Current 3-State Output Off-state Current Quiescent Supply Current Dynamic Output Current (note 1, 2) 5.5 5.5 V I (*) = V IH or V IL VI = V IH or V IL
(*)
Test Con dition s Min. VO = 0.1 V or VCC - 0.1 V VO = 0.1 V or VCC - 0.1 V I O=-50 A 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 VI = VCC or GND VI = VCC or GND VO = VCC or GND VI(OE) = VIH VI = VCC or GND VOLD = 1.65 V max VOHD = 3.85 V min 2.9 4.4 5.4 2.56 3.86 4.86 0.002 0.001 0.001 2.1 3.15 3.85 Typ. 1.5 2.25 2.75 1.5 2.25 2.75 2.99 4.49 5.49
Value T A = 25 oC Max. -40 to 85 o C Min . 2.1 3.15 3.85 0.9 1.35 1.65 2.9 4.4 5.4 2.46 3.76 4.76 0.1 0.1 0.1 0.36 0.36 0.36 0.1 0.5 0.1 0.1 0.1 0.44 0.44 0.44 1 5 0.9 1.35 1.65 Max.
Unit
V
V
V
V
A A
ICC IOLD IOHD
5.5 5.5
8
80 75 -75
A mA mA
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 . (*) All outputs loaded.
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AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 , Input tr = t f =3 ns)
Symbol Parameter V CC (V) tPLH tPHL tPZL tPZH tPLZ tPHZ tw ts th fMAX Propagation Delay Time CK to Q Output EnableTime Output Disable Time Clock Pulse Width HIGH or LOW Setup Time Q to CK HIGH or LOW Hold Time Q to CK HIGH or LOW Maximum Clock Frequency 3.3 5.0(**) 3.3(*) 5.0 3.3(*) 5.0(**) 3.3 5.0(**) 3.3(*) 5.0
(**) (*) (*) (**) (*)
T est Cond ition
Value T A = 25 oC -40 to 85 o C Min. Typ. Max. Min . Max. 6.5 5 7.5 5.5 7.5 6 1.5 1.5 -0.5 -0.5 0.5 0.5 60 100 250 270 12 9 12 9 12 9 5 4 5 4 2 2 60 100 13 10 13 10 13 10 6 5 5 4 3 3
Unit
ns ns ns ns ns ns MHz
3.3 (**) 5.0 3.3 5.0
(*) (**)
(*) Voltage range is 3.3V 0.3V (**) Voltage range is 5V 0.5V
CAPACITIVE CHARACTERISTICS
Symbol Parameter V CC (V) C OUT CIN C PD Output Capacitance Input Capacitance Power Dissipation Capacitance (note 1) 5.0 5.0 5.0 Test Con dition s Min. Typ. 8 4 46 Value T A = 25 oC Max. -40 to 85 o C Min . Max. pF pF pF Unit
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 operating current can be obtained by the following equation. ICC(opr) = CPD * VCC * fIN + ICC/n (per circuit)
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TEST CIRCUIT
TEST t PLH, tPHL t PZL, tPLZ t PZH, tPHZ
CL = 50 pF or equivalent (includes jig and probe capacitance) RL = R1 = 500 or equivalent RT =ZOUT of pulse generator (typically 50)
SWITCH Open 2VCC Open
WAVEFORM 1: PROPAGATION DELAYS, SETUP AND HOLD TIMES (f=1MHz; 50% duty cycle)
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WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIMES (f=1MHz; 50% duty cycle)
WAVEFORM 3: PULSE WIDTH
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Plastic DIP20 (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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SO20 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, 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 supersede and replaces all information previously supplied. s 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. (c) 1997 SGS-THOMSON Microelectronics - Printed in Italy - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A .
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