HD74HCT688RP-EL [RENESAS]
HCT SERIES, IDENTITY COMPARATOR, PDSO20, FP-20DB;
| 型号： | HD74HCT688RP-EL |
| 厂家： | 
RENESAS TECHNOLOGY CORP |
| 描述： | HCT SERIES, IDENTITY COMPARATOR, PDSO20, FP-20DB 比较器 |
| 文件： | 总8页 (文件大小：106K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HD74HCT688
8-bit Magnitude Comparator
REJ03D0673–0200
(Previous ADE-205-563)
Rev.2.00
Mar 30, 2006
Description
The HD74HCT688 compares bit for bit two 8-bit words and indicates whether or not they are equal. The P=Q output
indicates equality when it is low.
A single active low enable is provided to facilitate cascading of several packages and enable comparison of words
greater than 8-bits.
This device is useful in memory block decoding applications, where memory block enable signals must be generated
from computer address information.
Features
•
•
•
•
•
•
•
LSTTL Output Logic Level Compatibility as well as CMOS Output Compatibility
High Speed Operation: tpd (Data to P=Q) = 18 ns typ (CL = 50 pF)
High Output Current: Fanout of 10 LSTTL Loads
Wide Operating Voltage: VCC = 4.5 to 5.5 V
Low Input Current: 1 µA max
Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Ordering Information
Package Code
(Previous Code)
Package
Abbreviation
Taping Abbreviation
(Quantity)
Part Name
Package Type
DILP-20 pin (JEDEC)
SOP-20 pin (JEITA)
SOP-20 pin (JEDEC)
PRDP0020AC-B
(DP-20NEV)
HD74HCT688P
P
—
PRSP0020DD-B
(FP-20DAV)
HD74HCT688FPEL
HD74HCT688RPEL
FP
RP
EL (2,000 pcs/reel)
EL (1,000 pcs/reel)
PRSP0020DC-A
(FP-20DBV)
Function Table
Input
Output P=Q
Data P, Q
Enable G
P=Q
P>Q
P<Q
X
L
L
H
H
H
L
L
H
H : high level
L
:
:
low level
irrelevant
X
Rev.2.00, Mar 30, 2006 page 1 of 7
HD74HCT688
Pin Arrangement
G
1
2
3
4
5
6
7
8
9
20 VCC
P
0
0
1
1
2
2
3
3
19 P=Q
Q
P
Q
P
Q
P
Q
18 Q
7
6
5
4
17 P
7
16 Q
15 P
6
14 Q
13 P
5
12 Q
GND 10
11 P4
(Top view)
Rev.2.00, Mar 30, 2006 page 2 of 7
HD74HCT688
Logic Diagram
P0
Q0
P1
Q1
P2
Q2
P3
Q3
P4
P=Q
Q4
P5
Q5
P6
Q6
P7
Q7
G
Absolute Maximum Ratings
Item
Supply voltage range
Input / Output voltage
Input / Output diode current
Output current
Symbol
VCC
Ratings
Unit
V
–0.5 to 7.0
–0.5 to VCC +0.5
±20
VIN, VOUT
IIK, IOK
IOUT
V
mA
mA
mA
mW
°C
±25
VCC, GND current
ICC or IGND
PT
±50
Power dissipation
500
Storage temperature
Tstg
–65 to +150
Note: The absolute maximum ratings are values, which must not individually be exceeded, and furthermore, no two of
which may be realized at the same time.
Rev.2.00, Mar 30, 2006 page 3 of 7
HD74HCT688
Recommended Operating Conditions
Item
Supply voltage
Symbol
VCC
Ratings
4.5 to 5.5
0 to VCC
–40 to 85
0 to 500
Unit
V
Conditions
Input / Output voltage
Operating temperature
Input rise / fall time*1
VIN, VOUT
Ta
V
°C
ns
tr, tf
VCC = 4.5 V
Notes: 1. This item guarantees maximum limit when one input switches.
Waveform: Refer to test circuit of switching characteristics.
Electrical Characteristics
Ta = 25°C
Ta = –40 to+85°C
Item
Symbol VCC (V)
Min
Typ
—
—
—
—
—
—
—
—
Max
—
Min
2.0
—
Max
—
Unit
V
Test Conditions
Input voltage
VIH
VIL
4.5 to 5.5 2.0
4.5 to 5.5
4.5
—
4.4
4.18
—
0.8
—
0.8
—
V
Output voltage
VOH
4.4
4.13
—
V
Vin = VIH or VIL IOH = –20 µA
IOH = –4 mA
4.5
—
—
VOL
4.5
0.1
0.26
±0.1
4.0
0.1
0.33
±1.0
40
V
Vin = VIH or VIL IOL = 20 µA
4.5
—
—
IOL = 4 mA
Input current
Iin
5.5
—
—
µA Vin = VCC or GND
Quiescent current
ICC
5.5
—
—
µA Vin = VCC or GND, Iout = 0 µA
Switching Characteristics
(CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25°C
Ta = –40 to +85°C
Item
Symbol
tPLH
V
CC (V)
Unit
Min
Typ
17
19
9
Max
Min
—
Max
53
Test Conditions
Propagation delay
time
4.5
—
—
—
—
—
42
42
24
24
15
ns Por Q to output
tPHL
4.5
—
53
tPLH
4.5
—
30
ns Enable to output
tPHL
4.5
12
5
—
30
Output rise/fall time
Input capacitance
tTLH
tTHL
4.5
—
19
ns
Cin
—
—
5
10
—
10
pF
Test Circuit
VCC
VCC
G
Input
Output
P1
P7
Q0
Pulse Generator
Zout
P=Q
Ω
= 50
CL =
50 pF
Q7
Note : 1. CL includes probe and jig capacitance.
Rev.2.00, Mar 30, 2006 page 4 of 7
HD74HCT688
Waveforms
•
Waveform – 1
tr
tf
V
CC
90%
1.3V
10%
90%
1.3V
10%
P or Q
0 V
tw
tPHL
tPLH
V
OH
90%
1.3V
90%
1.3V
10%
P=Q
V
OL
tTLH
tTHL
•
Waveform – 2
tr
tf
VCC
90%
1.3V
90%
1.3V
G
10%
10%
0 V
tPHL
90%
tPLH
V
OH
90%
1.3V
10%
1.3V
P=Q
10%
VOL
tTHL
tTLH
Notes : 1. Input waveform : PRR ≤ 1 MHz, duty cycle 50%, tr ≤ 6 ns, tf ≤ 6 ns
Rev.2.00, Mar 30, 2006 page 5 of 7
HD74HCT688
Package Dimensions
JEITA Package Code
P-DIP20-6.3x24.5-2.54
RENESAS Code
Previous Code
DP-20NEV
MASS[Typ.]
1.26g
PRDP0020AC-B
D
20
11
1
10
b 3
0.89
Z
Dimension in Millimeters
Min Nom Max
7.62
Reference
Symbol
e1
D
E
A
A1
bp
b3
c
24.50 25.40
6.30 7.00
5.08
bp
e
c
0.51
e1
0.40 0.48 0.56
1.30
0.19 0.25 0.31
( Ni/Pd/Au plating )
θ
0° 15°
2.29 2.54 2.79
e
Z
1.27
2.54
L
JEITA Package Code
RENESAS Code
PRSP0020DC-A
Previous Code
FP-20DBV
MASS[Typ.]
0.52g
P-SOP20-7.5x12.8-1.27
*1
D
F
NOTE)
20
11
1. DIMENSIONS"*1 (Nom)"AND"*2"
@ DO NOT INCLUDE MOLD FLASH.
2. DIMENSION"*3"DOES NOT
@ INCLUDE TRIM OFFSET.
bp
Index mark
Terminal cross section
( Ni/Pd/Au plating )
Dimension in Millimeters
Reference
Symbol
Min Nom Max
1
10
x
D
E
12.80 13.2
7.50
*3
e
bp
Z
M
L1
A2
A1
A
bp
b1
c
0.10 0.20 0.30
2.65
0.34 0.40 0.46
0.20 0.25 0.30
c1
θ
0° 8°
10.00 10.40 10.65
L
y
HE
e
x
1.27
0.12
0.15
Detail F
y
Z
L
L1
0.935
0.40 0.70 1.27
1.45
Rev.2.00, Mar 30, 2006 page 6 of 7
HD74HCT688
JEITA Package Code
RENESAS Code
PRSP0020DD-B
Previous Code
FP-20DAV
MASS[Typ.]
0.31g
P-SOP20-5.5x12.6-1.27
*1
D
F
NOTE)
1. DIMENSIONS"*1 (Nom)"AND"*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION"*3"DOES NOT
INCLUDE TRIM OFFSET.
20
11
bp
Index mark
Terminal cross section
( Ni/Pd/Au plating )
1
10
x
Dimension in Millimeters
Reference
Symbol
*3
e
bp
Z
M
Min Nom Max
D
L1
12.60 13.0
5.50
E
A2
A1
A
bp
b1
c
0.00 0.10 0.20
2.20
0.34 0.40 0.46
0.15 0.20 0.25
y
L
c1
θ
0° 8°
7.50 7.80 8.00
Detail F
HE
e
x
1.27
0.12
0.15
y
Z
L
L1
0.80
0.50 0.70 0.90
1.15
Rev.2.00, Mar 30, 2006 page 7 of 7
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