INTEGRATED CIRCUITS
74LV688 8-bit magnitude comparator
Product specification Supersedes data of 1997 May 15 IC24 Data Handbook 1998 Jun 23
Philips Semiconductors
Philips Semiconductors
Product specification
8-bit magnitude comparator
74LV688
FEATURES
* Wide operating voltage: 1.0 to 5.5V * Optimized for low voltage applications: 1.0V to 3.6V * Accepts TTL input levels between VCC = 2.7V and VCC = 3.6V * Typical VOLP (output ground bounce) < 0.8V at VCC = 3.3V, * Typical VOHV (output VOH undershoot) > 2V at VCC = 3.3V, * Compare two 8-bit words * Output capability: standard * ICC category: MSI
QUICK REFERENCE DATA
SYMBOL tPHL/tPLH CI CPD PARAMETER Propagation delay Pn, Qn to P=Q Input capacitance Power dissipation capacitance per gate Tamb = 25C Tamb = 25C
DESCRIPTION
The 74LV688 is a high-speed Si-gate CMOS device, pin compatible with the 74HC/HCT688 The 74LV688 is an 8-bit magnitude comparator. It performs comparisons of two 8-bit binary or BCD words. The output provides P = Q (equal-to).
CONDITIONS CL = 15pF VCC = 3.3V
TYPICAL 17 3.5
UNIT ns pF pF
VI = GND to VCC1
22
NOTE: 1. CPD is used to determine the dynamic power dissipation (PD in mW): PD = CPD x VCC2 x fi + S (CL x VCC2 x fo) where: fi = input frequency in MHz; CL = output load capacity in pF; fo = output frequency in MHz; VCC = supply voltage in V; S (CL x VCC2 x fo) = sum of outputs.
ORDERING INFORMATION
PACKAGES 20-Pin Plastic DIL 20-Pin Plastic SO 20-Pin Plastic SSOP Type II 20-Pin Plastic TSSOP Type I TEMPERATURE RANGE -40C to +125C -40C to +125C -40C to +125C -40C to +125C OUTSIDE NORTH AMERICA 74LV688 N 74LV688 D 74LV688 DB 74LV688 PW NORTH AMERICA 74LV688 N 74LV688 D 74LV688 DB 74LV688PW DH PKG. DWG. # SOT146-1 SOT163-1 SOT339-1 SOT360-1
PIN CONFIGURATION
E P0 Q0 P1 Q1 P2 Q2 P3 Q3 1 2 3 4 5 6 7 8 9 20 19 18 17 16 15 14 13 12 11 VCC P=Q Q7 P7 Q6 P6 Q5 P5 Q4 P4
PIN DESCRIPTION
PIN NO. 1 2, 4, 6, 8, 11, 13, 15, 17 3, 5, 7, 9, 12, 14, 16, 18 10 19 20 E P0 to P7 Q0 to Q7 GND P=Q VCC SYMBOL FUNCTION Enable input (active LOW) Word inputs Word inputs Ground (0V) Equal to output Positive Supply Voltage
GND 10
SY00054
1998 Jun 23
2
853-1878 19618
Philips Semiconductors
Product specification
8-bit magnitude comparator
74LV688
LOGIC SYMBOL
2 4 6 8 11 13 15 17 3 5 7 9 12 14 16 18 P0 P1 P2 P3 P4 P5 P6 P7 P=Q Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 E 1 19
LOGIC DIAGRAM
P7 Q7 P6 Q6
P5 Q5 P4 Q4 P3 P=Q Q3 P2 Q2
SY00055
LOGIC SYMBOL (IEEE/IEC)
1 2 4 6 8 11 13 15 17 3 5 7 9 12 14 16 18 7 Q 7 (P = Q) 1 0 19 P G1 0
P1 Q1 P0 Q0
E
SY00057
FUNCTION TABLE
INPUTS DATA Pn, Qn P=Q X ENABLE E L H L L OUTPUT P=Q L H H H
SY00056
P>Q P1998 Jun 23
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Philips Semiconductors
Product specification
8-bit magnitude comparator
74LV688
ABSOLUTE MAXIMUM RATINGS1, 2
In accordance with the Absolute Maximum Rating System (IEC 134). Voltages are referenced to GND (ground = 0V). SYMBOL VCC IIK IOK IO IGND, ICC Tstg DC supply voltage DC input diode current DC output diode current DC output source or sink current - standard outputs DC VCC or GND current for types with - standard outputs Storage temperature range power dissipation per package - plastic DIL - plastic mini-pack (SO) - plastic medium-shrink SO (SSOP and TSSOP) for temperature range: -40 to +125C above +70C derate linearly with 12 mW/K above +70C derate linearly with 8 mW/K above +60C derate linearly with 5.5 mW/K -65 - - - VI < -0.5 V or V1 > VCC + 0.5V VO < -0.5 V or V0 > VCC + 0.5V -0.5V < VO < VCC +0.5V PARAMETER CONDITIONS MIN -0.5 - - MAX +7.0 20 50 25 50 +150 750 500 400 UNIT V mA mA mA
mA C
Ptot
mW
NOTES: 1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150C. 3. The input and output negative voltage ratings may be exceeded if the input and output clamp current ratings are observed.
RECOMMENDED OPERATING CONDITIONS
SYMBOL VCC VI VO Tamb PARAMETER DC supply voltage DC Input voltage DC output voltage Operating ambient temperature range in free-air See DC and AC characteristics VCC = 1.0V to 2.0V VCC = 2.0V to 2.7V VCC = 2.7V to 3.6V VCC = 3.6V to 5.5V CONDITIONS see note 1 MIN MIN. 1.0 0 0 -40 -40 TYP TYP. 3.3 - - - - - - - - MAX MAX. 5.5 VCC VCC +85 +125 500 200 100 50 UNIT V V V C
tr, tf (t/v)
Input rise and fall times
ns/V
NOTE: 1. The LV is guaranteed to function down to VCC = 1.0V (input levels GND or VCC); DC characteristics are guaranteed from VCC = 1.2V to VCC = 5.5V.
1998 Jun 23
4
Philips Semiconductors
Product specification
8-bit magnitude comparator
74LV688
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions. Voltages are referenced to GND (ground = 0V). LIMITS SYMBOL PARAMETER TEST CONDITIONS MIN VCC = 1.2V VIH HIGH level Input voltage VCC = 2.0V VCC = 2.7 to 3.6V VCC = 4.5 to 5.5V VCC = 1.2V VIL LOW level Input voltage VCC = 2.0V VCC = 2.7 to 3.6V VCC = 4.5 to 5.5 VCC = 1.2V; VI = VIH or VIL; -IO = 100A HIGH level output voltage all outputs out uts voltage; VOH HIGH level output voltage; g STANDARD outputs VCC = 2.0V; VI = VIH or VIL; -IO = 100A VCC = 2.7V; VI = VIH or VIL; -IO = 100A VCC = 3.0V; VI = VIH or VIL; -IO = 100A VCC = 4.5V; VI = VIH or VIL; -IO = 100A VCC = 3.0V; VI = VIH or VIL; -IO = 6mA VCC = 4.5V; VI = VIH or VIL; -IO = 12mA VCC = 1.2V; VI = VIH or VIL; IO = 100A LOW level output voltage out uts voltage; all outputs VOL LOW level output voltage; g STANDARD outputs II ICC ICC Input leakage current Quiescent supply current; MSI Additional quiescent supply current VCC = 2.0V; VI = VIH or VIL; IO = 100A VCC = 2.7V; VI = VIH or VIL; IO = 100A VCC = 3.0V; VI = VIH or VIL; IO = 100A VCC = 4.5V; VI = VIH or VIL; IO = 100A VCC = 3.0V; VI = VIH or VIL; IO = 6mA VCC = 4.5V; VI = VIH or VIL; IO = 12mA VCC = 5.5V; VI = VCC or GND VCC = 5.5V; VI = VCC or GND; IO = 0 VCC = 2.7V to 3.6V; VI = VCC - 0.6V 1.8 2.5 2.8 4.3 2.40 3.60 1.2 2.0 2.7 3.0 4.5 2.82 4.20 0 0 0 0 0 0.25 0.35 0.2 0.2 0.2 0.2 0.40 0.55 1.0 20.0 500 0.2 0.2 0.2 0.2 0.50 0.65 1.0 160 850 A A A V 1.8 2.5 2.8 4.3 2.20 3.50 V 0.9 1.4 2.0 0.7NOTE: 1. All typical values are measured at Tamb = 25C.
1998 Jun 23
5
Philips Semiconductors
Product specification
8-bit magnitude comparator
74LV688
AC CHARACTERISTICS
GND = 0V; tr = tf = 2.5ns; CL = 50pF; RL = 1K SYMBOL PARAMETER WAVEFORM CONDITION VCC(V) 1.2 2.0 tPHL/tPLH Propagation delay Pn, Qn to P=Q 2 2.7 3.0 to 3.6 4.5 to 5.5 1.2 2.0 tPHL/tPLH Propagation delay E to P=Q 1 2.7 3.0 to 3.6 4.5 to 5.5 NOTES: 1. Unless otherwise stated, all typical values are at Tamb = 25C. 2. Typical value measured at VCC = 3.3V. 3. Typical value measured at VCC = 5.0V. MIN LIMITS -40 to +85 C TYP1 100 28 20 162 112 50 17 13 102 72 MAX - 45 32 26 18 - 29 21 17 12 -40 to +125 C MIN MAX - 57 40 33 22 - 38 27 22 15 ns ns UNIT
AC WAVEFORMS
VM = 1.5V at VCC w 2.7V; VM = 0.5 VCC at VCC t 2.7V. VOL and VOH are the typical output voltage drop that occur with the output load.
VI E INPUT VM
TEST CIRCUIT
Vcc
Vl PULSE GENERATOR RT tPLH tPHL D.U.T.
VO
50pF CL
GND
RL= 1k
VOH P = Q OUTPUT VOL VM
Test Circuit for Outputs DEFINITIONS
RL = Load resistor CL = Load capacitance includes jig and probe capacitiance
SV00195
RT = Termination resistance should be equal to ZOUT of pulse generators.
Waveform 1.
Propagation delays from the enable input (E) to the equal-to output (P = Q).
TEST tPLH/tPHL
VCC < 2.7V 2.7-3.6V 4.5 V
VI VCC 2.7V VCC
Pn, Qn INPUT
VM
VM
SV00902
Waveform 3.
tPHL tPLH
Load circuitry for switching times
P = Q OUTPUT
VM
VM
SV00194
Waveform 2.
Propagation delays from the inputs (Pn, Qn) to the equal-to output (P = Q).
1998 Jun 23
6
Philips Semiconductors
Product specification
8-bit magnitude comparator
74LV688
APPLICATION INFORMATION
Two or more "688" 8-bit magnitude comparators may be cascaded to compare binary or BCD numbers of more than 8 bits.
An
688
An-1
688
A0
688
A=B
A=B
A=B
OUTPUT
Bn
8 MSB
Bn-1
B0
8 LSB
ENABLE INPUT
ENABLE INPUT
ENABLE INPUT
SV00196
Waveform 4.
Binary or BCD comparator
1998 Jun 23
7
Philips Semiconductors
Product specification
8-bit magnitude comparator
74LV688
DIP20: plastic dual in-line package; 20 leads (300 mil)
SOT146-1
1998 Jun 23
8
Philips Semiconductors
Product specification
8-bit magnitude comparator
74LV688
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
1998 Jun 23
9
Philips Semiconductors
Product specification
8-bit magnitude comparator
74LV688
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
SOT339-1
1998 Jun 23
10
Philips Semiconductors
Product specification
8-bit magnitude comparator
74LV688
TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm
SOT360-1
1998 Jun 23
11
Philips Semiconductors
Product specification
8-bit magnitude comparator
74LV688
DEFINITIONS
Data Sheet Identification
Objective Specification
Product Status
Formative or in Design
Definition
This data sheet contains the design target or goal specifications for product development. Specifications may change in any manner without notice. This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes at any time without notice, in order to improve design and supply the best possible product.
Preliminary Specification
Preproduction Product
Product Specification
Full Production
Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. LIFE SUPPORT APPLICATIONS Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices, or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088-3409 Telephone 800-234-7381 (c) Copyright Philips Electronics North America Corporation 1998 All rights reserved. Printed in U.S.A. print code Document order number: Date of release: 05-96 9397-750-04456
Philips Semiconductors
1998 Jun 23 12
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