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MC74LCX16646DT [MOTOROLA]

LOW-VOLTAGE CMOS 16-BIT TRANSCEIVER/ REGISTERED TRANSCEIVER; 低电压CMOS 16位收发器/寄存收发器
MC74LCX16646DT
型号： MC74LCX16646DT
厂家： MOTOROLA    MOTOROLA
描述：

LOW-VOLTAGE CMOS 16-BIT TRANSCEIVER/ REGISTERED TRANSCEIVER
低电压CMOS 16位收发器/寄存收发器
文件： 总10页 (文件大小：168K)
中文：  中文翻译
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SEMICONDUCTOR TECHNICAL DATA  
LOW–VOLTAGE CMOS  
16–BIT TRANSCEIVER/  
REGISTERED TRANSCEIVER  
The MC74LCX16646 is a high performance, non–inverting 16–bit  
transceiver/registered transceiver operating from a 2.7 to 3.6V supply.  
The device is byte controlled. Each byte has separate control inputs  
which can be tied together for full 16–bit operation. High impedance TTL  
compatible inputs significantly reduce current loading to input drivers  
while TTL compatible outputs offer improved switching noise  
performance. A V specification of 5.5V allows MC74LCX16646 inputs to  
I
be safely driven from 5V devices. The MC74LCX16646 is suitable for  
memory address driving and all TTL level bus oriented transceiver  
applications.  
Data on the A or B bus will be clocked into the registers as the  
appropriate clock pin goes from a LOW–to–HIGH logic level. Output  
Enable (OEn) and Direction Control (DIRn) pins are provided to control  
the transceiver outputs. In the transceiver mode, data present at the high  
impedance port may be stored in either the A or the B register or in both.  
The select controls (SBAn, SABn) can multiplex stored and real–time  
(transparent mode) data. The DIR determines which bus will receive data  
when OE is active LOW. In the isolation mode (OE HIGH), A data may be  
stored in the B register or B data may be stored in the A register. Only one  
of the two buses, A or B, may be driven at one time.  
DT SUFFIX  
PLASTIC TSSOP PACKAGE  
CASE 1202–01  
• Designed for 2.7 to 3.6V V  
CC  
Operation  
• 5.2ns Maximum t  
pd  
• 5V Tolerant — Interface Capability With 5V TTL Logic  
• Supports Live Insertion and Withdrawal  
PIN NAMES  
Pins  
Function  
• I  
OFF  
Specification Guarantees High Impedance When V  
= 0V  
CC  
A0–A15  
B0–B15  
CABn, CBAn  
SABn, SBAn  
DIRn, OEn  
Side A Inputs/Outputs  
Side B Inputs/Outputs  
Clock Pulse Inputs  
Select Control Inputs  
Output Enable Inputs  
• LVTTL Compatible  
• LVCMOS Compatible  
• 24mA Balanced Output Sink and Source Capability  
• Near Zero Static Supply Current in All Three Logic States (20µA)  
Substantially Reduces System Power Requirements  
• Latchup Performance Exceeds 500mA  
• ESD Performance: Human Body Model >2000V; Machine Model >200V  
This document contains information on a new product. Specifications and information herein are subject to  
change without notice.  
11/96  
REV 0.2  
Motorola, Inc. 1996  
MC74LCX16646  
DIR1  
CAB1  
SAB1  
GND  
A0  
OE1  
CBA1  
SBA1  
GND  
B0  
1
2
56  
55  
54  
53  
52  
3
4
5
A1  
6
51 B1  
V
V
CC  
7
50  
49  
48  
47  
46  
45  
CC  
A2  
A3  
B2  
8
B3  
9
A4  
B4  
10  
11  
12  
GND  
A5  
GND  
B5  
A6 13  
44 B6  
A7  
A8  
B7  
14  
15  
16  
17  
18  
19  
43  
42  
41  
40  
39  
38  
B8  
A9  
B9  
A10  
GND  
A11  
B10  
GND  
B11  
A12 20  
37 B12  
A13  
B13  
21  
22  
23  
24  
25  
26  
27  
28  
36  
35  
34  
33  
32  
31  
30  
29  
V
V
CC  
CC  
A14  
B14  
A15  
GND  
B15  
GND  
SBA2  
CBA2  
OE2  
SAB2  
CAB2  
DIR2  
MOTOROLA  
2
MC74LCX16646  
LOGIC DIAGRAM  
55  
1
CBA1  
DIR1  
56  
54  
OE1  
SBA1  
3
2
SAB1  
CAB1  
C
Q
A0:7  
D
C
Q
B0:7  
D
1 of 8 Channels  
To 7 Other Channels  
30  
28  
CBA2  
DIR2  
29  
31  
OE2  
SBA2  
26  
27  
SAB2  
CAB2  
C
Q
A8:15  
D
C
Q
B8:15  
D
1 of 8 Channels  
To 7 Other Channels  
3
MOTOROLA  
MC74LCX16646  
BUS APPLICATIONS  
Real Time Transfer – Bus B to  
Bus A  
Real Time Transfer – Bus A to  
Bus B  
OE  
L
DIR  
L
CAB  
CBA  
X
SAB  
X
SBA  
L
OE  
L
DIR  
H
CAB  
X
CBA  
X
SAB  
L
SBA  
X
X
Store Data from Bus A, Bus B or  
Busses A and B  
Transfer Storage Data to Bus A  
or Bus B  
OE  
DIR  
CAB  
CBA  
SAB  
SBA  
OE  
DIR  
CAB  
CBA  
SAB  
SBA  
X
X
H
X
X
X
↑
X
↑
X
↑
↑
X
X
X
X
X
X
L
L
L
H
X
H or L  
X
X
H
H
X
H or L  
MOTOROLA  
4
MC74LCX16646  
FUNCTION TABLE  
Inputs  
CBAn  
Data Ports  
Operating Mode  
OEn  
DIRn  
CABn  
SABn  
SBAn  
An  
Bn  
H
X
Input  
Input  
↑
↑
↑
↑
X
X
X
X
X
X
Isolation, Hold Storage  
l
X
X
l
Store A and/or B Data  
h
X
X
h
L
H
Input  
Output  
↑
↑
X*  
X*  
L
X
L
H
L
H
Real Time A Data to B Bus  
H
L
X
X
X
QA  
Stored A Data to B Bus  
l
h
L
H
Real Time A Data to B Bus; Store A Data  
H
X
L
H
QA  
QA  
Clock A Data to B Bus; Store A Data  
L
L
Output  
Input  
X*  
X*  
↑
↑
X
L
L
H
L
H
Real Time B Data to A Bus  
X
X
H
L
QB  
X
Stored B Data to A Bus  
L
H
l
h
Real Time B Data to A Bus; Store B Data  
X
H
QB  
QB  
L
H
Clock B Data to A Bus; Store B Data  
H = High Voltage Level; h = High Voltage Level One Setup Time Prior to the Low–to–High Clock Transition; L = Low Voltage Level; l = Low Voltage Level One Setup  
TimePriortotheLow–to–HighClockTransition;X=Don’tCare;↑ =Low–to–HighClockTransition;↑ =NOTLow–to–HighClockTransition;QA=Ainputstorageregister;  
QB = B input storage register; * = The clocks are not internally gated with either the Output Enables or the Source Inputs. Therefore, data at the A or B ports may be  
clocked into the storage registers, at any time. For I  
reasons, Do Not Float Inputs.  
CC  
ABSOLUTE MAXIMUM RATINGS*  
Symbol  
CC  
Parameter  
DC Supply Voltage  
Value  
Condition  
Unit  
V
V
V
V
–0.5 to +7.0  
DC Input Voltage  
–0.5 ≤ V ≤ +7.0  
V
I
I
DC Output Voltage  
–0.5 ≤ V ≤ +7.0  
Output in 3–State  
Note 1.  
V
O
O
–0.5 ≤ V ≤ V  
+ 0.5  
CC  
V
O
I
I
DC Input Diode Current  
DC Output Diode Current  
–50  
–50  
V < GND  
mA  
mA  
mA  
mA  
mA  
mA  
°C  
IK  
I
V
O
< GND  
OK  
+50  
V > V  
O CC  
I
I
I
DC Output Source/Sink Current  
DC Supply Current Per Supply Pin  
DC Ground Current Per Ground Pin  
Storage Temperature Range  
±50  
O
±100  
±100  
CC  
GND  
T
–65 to +150  
STG  
* Absolutemaximumcontinuousratingsarethosevaluesbeyondwhichdamagetothedevicemayoccur. Exposuretotheseconditionsorconditions  
beyond those indicated may adversely affect device reliability. Functional operation under absolute–maximum–rated conditions is not implied.  
1. Output in HIGH or LOW State. I absolute maximum rating must be observed.  
O
5
MOTOROLA  
MC74LCX16646  
RECOMMENDED OPERATING CONDITIONS  
Symbol  
CC  
Parameter  
Min  
Typ  
Max  
Unit  
V
Supply Voltage  
Operating  
Data Retention Only  
2.0  
1.5  
3.3  
3.3  
3.6  
3.6  
V
V
V
Input Voltage  
0
5.5  
V
V
I
Output Voltage  
(HIGH or LOW State)  
(3–State)  
0
0
V
CC  
O
5.5  
–24  
24  
I
I
I
I
HIGH Level Output Current, V  
= 3.0V – 3.6V  
mA  
mA  
mA  
mA  
°C  
OH  
OL  
OH  
OL  
CC  
LOW Level Output Current, V  
= 3.0V – 3.6V  
= 2.7V – 3.0V  
= 2.7V – 3.0V  
CC  
HIGH Level Output Current, V  
–12  
12  
CC  
LOW Level Output Current, V  
CC  
T
A
Operating Free–Air Temperature  
Input Transition Rise or Fall Rate, V from 0.8V to 2.0V,  
–40  
0
+85  
10  
∆t/∆V  
ns/V  
IN  
V
= 3.0V  
CC  
DC ELECTRICAL CHARACTERISTICS  
T
A
= –40°C to +85°C  
Symbol  
Characteristic  
HIGH Level Input Voltage (Note 2.)  
LOW Level Input Voltage (Note 2.)  
HIGH Level Output Voltage  
Condition  
Min  
2.0  
Max  
Unit  
V
V
V
V
2.7V ≤ V  
≤ 3.6V  
IH  
CC  
CC  
2.7V ≤ V  
2.7V ≤ V  
≤ 3.6V  
= –100µA  
0.8  
V
IL  
≤ 3.6V; I  
V
– 0.2  
V
OH  
CC  
OH  
CC  
V
CC  
V
CC  
V
CC  
= 2.7V; I  
= 3.0V; I  
= 3.0V; I  
= –12mA  
= –18mA  
= –24mA  
2.2  
OH  
OH  
OH  
2.4  
2.2  
V
LOW Level Output Voltage  
2.7V ≤ V  
≤ 3.6V; I  
= 100µA  
0.2  
0.4  
V
OL  
CC  
OL  
OL  
V
= 2.7V; I = 12mA  
CC  
CC  
CC  
V
V
= 3.0V; I  
= 3.0V; I  
= 16mA  
= 24mA  
0.4  
OL  
OL  
0.55  
±5.0  
±5.0  
I
I
Input Leakage Current  
3–State Output Current  
2.7V ≤ V  
≤ 3.6V; 0V ≤ V ≤ 5.5V  
µA  
µA  
I
CC  
I
2.7 ≤ V  
≤ 3.6V; 0V ≤ V ≤ 5.5V;  
OZ  
CC  
V = V or V  
IL  
O
I
IH  
I
I
Power–Off Leakage Current  
Quiescent Supply Current  
V
= 0V; V or V = 5.5V  
10  
20  
µA  
µA  
µA  
µA  
OFF  
CC  
I
O
2.7 ≤ V  
≤ 3.6V; V = GND or V  
CC  
CC  
I
CC  
2.7 ≤ V  
≤ 3.6V; 3.6 ≤ V or V ≤ 5.5V  
±20  
500  
CC  
I
O
∆I per Input  
2. These values of V are used to test DC electrical characteristics only.  
Increase in I  
2.7 ≤ V  
≤ 3.6V; V = V  
IH  
– 0.6V  
CC  
CC  
CC  
CC  
I
MOTOROLA  
6
MC74LCX16646  
AC CHARACTERISTICS (Note 3.; t = t = 2.5ns; C = 50pF; R = 500Ω)  
R
F
L
L
Limits  
T
A
= –40°C to +85°C  
V
= 3.0V to 3.6V  
Max  
V
= 2.7V  
CC  
CC  
Symbol  
Parameter  
Waveform  
Min  
Min  
Max  
Unit  
MHz  
ns  
f
Clock Pulse Frequency  
3
1
170  
max  
t
t
Propagation Delay  
Input to Output  
1.5  
1.5  
5.2  
5.2  
1.5  
1.5  
6.0  
6.0  
PLH  
PHL  
t
t
Propagation Delay  
Clock to Output  
3
1
2
2
1.5  
1.5  
6.0  
6.0  
1.5  
1.5  
7.0  
7.0  
ns  
ns  
ns  
ns  
PLH  
PHL  
t
t
Propagation Delay  
Select to Output  
1.5  
1.5  
6.0  
6.0  
1.5  
1.5  
7.0  
7.0  
PLH  
PHL  
t
t
Output Enable Time to  
High and Low Level  
1.5  
1.5  
7.5  
7.5  
1.5  
1.5  
8.5  
8.5  
PZH  
PZL  
t
t
Output Disable Time From  
High and Low Level  
1.5  
1.5  
6.5  
6.5  
1.5  
1.5  
7.5  
7.5  
PHZ  
PLZ  
t
t
t
Setup Time, HIGH or LOW Data to Clock  
Hold Time, HIGH or LOW Data to Clock  
Clock Pulse Width, HIGH or LOW  
3
3
3
2.5  
1.5  
3.0  
2.5  
1.5  
3.0  
ns  
ns  
ns  
ns  
s
h
w
t
t
Output–to–Output Skew  
(Note 4.)  
1.0  
1.0  
OSHL  
OSLH  
3. These AC parameters are preliminary and may be modified prior to release.  
4. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device.  
The specification applies to any outputs switching in the same direction, either HIGH–to–LOW (t  
guaranteed by design.  
) or LOW–to–HIGH (t  
OSHL  
); parameter  
OSLH  
DYNAMIC SWITCHING CHARACTERISTICS  
T
A
= +25°C  
Symbol  
Characteristic  
Condition  
Min  
Typ  
0.8  
0.8  
Max  
Unit  
V
V
V
Dynamic LOW Peak Voltage (Note 5.)  
Dynamic LOW Valley Voltage (Note 5.)  
V
V
= 3.3V, C = 50pF, V = 3.3V, V = 0V  
L IH IL  
OLP  
CC  
= 3.3V, C = 50pF, V = 3.3V, V = 0V  
IH IL  
V
OLV  
CC  
L
5. Number of outputs defined as “n”. Measured with “n–1” outputs switching from HIGH–to–LOW or LOW–to–HIGH. The remaining output is  
measured in the LOW state.  
CAPACITIVE CHARACTERISTICS  
Symbol  
Parameter  
Input Capacitance  
Condition  
= 3.3V, V = 0V or V  
Typical  
Unit  
pF  
C
C
C
V
V
7
8
IN  
CC  
I
CC  
CC  
Input/Output Capacitance  
= 3.3V, V = 0V or V  
pF  
I/O  
PD  
CC  
I
Power Dissipation Capacitance  
10MHz, V  
= 3.3V, V = 0V or V  
CC  
20  
pF  
CC  
I
7
MOTOROLA  
MC74LCX16646  
2.7V  
0V  
An, Bn,  
SBAn, SABn  
1.5V  
t
, t  
PLH PHL  
V
OH  
Bn, An  
1.5V  
V
OL  
WAVEFORM 1 – SAB to B and SBA to A, An to Bn PROPAGATION DELAYS  
t
= t = 2.5ns, 10% to 90%; f = 1MHz; t = 500ns  
R
F
W
2.7V  
OEn  
1.5V  
1.5V  
0V  
DIRn  
t
t
PHZ  
PZH  
V
– 0.3V  
OH  
1.5V  
1.5V  
An, Bn  
≈
0V  
t
t
PLZ  
PZL  
≈
3.0V  
An, Bn  
V
+ 0.3V  
OL  
WAVEFORM 2 – OE/DIR to An/Bn OUTPUT ENABLE AND DISABLE TIMES  
= t = 2.5ns, 10% to 90%; f = 1MHz; t = 500ns  
t
R
F
W
Figure 1. AC Waveforms  
MOTOROLA  
8
MC74LCX16646  
2.7V  
An, Bn  
1.5V  
0V  
t
t
t
s
h
2.7V  
CABn,  
CBAn  
1.5V  
1.5V  
w
0V  
f
max  
t
, t  
PLH PHL  
V
V
OH  
Bn, An  
1.5V  
OL  
WAVEFORM 3 – CLOCK to Bn/An PROPAGATION DELAYS, CLOCK MINIMUM PULSE WIDTH,  
An/Bn to CLOCK SETUP AND HOLD TIMES  
t
= t = 2.5ns, 10% to 90%; f = 1MHz; t = 500ns except when noted  
R
F W  
t
w
NEGATIVE  
PULSE  
1.5V  
1.5V  
1.5V  
1.5V  
POSITIVE  
PULSE  
t
w
WAVEFORM 4 – INPUT PULSE DEFINITION  
= t = 2.5ns, 10% to 90% of 0V to 2.7V  
t
R
F
Figure 1. AC Waveforms (continued)  
V
CC  
6V  
OPEN  
GND  
R
1
PULSE  
GENERATOR  
DUT  
R
C
R
L
T
L
TEST  
SWITCH  
Open  
6V  
t , t  
PLH PHL  
t , t  
PZL PLZ  
Open Collector/Drain t  
PLH  
and t  
PHL  
6V  
t
, t  
GND  
PZH PHZ  
C
R
R
= 50pF or equivalent (Includes jig and probe capacitance)  
L
L
T
= R = 500Ω or equivalent  
1
OUT  
= Z  
of pulse generator (typically 50Ω)  
Figure 2. Test Circuit  
9
MOTOROLA  
MC74LCX16646  
OUTLINE DIMENSIONS  
DT SUFFIX  
PLASTIC TSSOP PACKAGE  
CASE 1202–01  
ISSUE A  
56X K REF  
0.12 (0.005)  
K
K1  
NOTES:  
1. DIMENSIONING AND TOLERANCING PER  
ANSI Y14.5M, 1982.  
M
S
S
T
U
V
2. CONTROLLING DIMENSION: MILLIMETER.  
3. DIMENSIONS A AND B DO NOT INCLUDE  
MOLD FLASH, PROTRUSIONS OR GATE  
BURRS. MOLD FLASH OR GATE BURRS  
SHALL NOT EXCEED 0.15 (0.006) PER SIDE.  
4. DIMENSION K DOES NOT INCLUDE DAMBAR  
PROTRUSION. ALLOWABLE DAMBAR  
PROTRUSION SHALL BE 0.08 (0.003) TOTAL  
IN EXCESS OF THE K DIMENSION AT  
MAXIMUM MATERIAL CONDITION.  
5. TERMINAL NUMBERS ARE SHOWN FOR  
REFERENCE ONLY.  
J
J1  
56  
29  
28  
SECTION N–N  
B
L
–U–  
N
1
6. DIMENSIONS A AND B ARE TO BE  
DETERMINED AT DATUM PLANE –W–.  
MILLIMETERS  
INCHES  
DIM  
A
B
C
D
F
G
H
J
J1  
K
MIN  
13.90  
6.00  
–––  
0.05  
0.50  
MAX  
14.10  
6.20  
1.10  
0.15  
0.75  
MIN  
MAX  
0.555  
0.244  
0.043  
0.006  
0.030  
A
–V–  
PIN 1  
0.547  
0.236  
–––  
0.002  
0.020  
IDENT.  
N
M
F
0.50 BSC  
0.0197 BSC  
0.12  
0.09  
0.09  
0.17  
0.17  
7.95  
0
–––  
0.20  
0.16  
0.27  
0.23  
8.25  
8
0.005  
0.004  
0.004  
0.007  
0.007  
0.313  
0
–––  
0.008  
0.006  
0.011  
0.009  
0.325  
8
0.25 (0.010)  
DETAIL E  
D
C
K1  
L
M
–W–  
0.076 (0.003)  
DETAIL E  
–T–  
SEATING  
PLANE  
H
G
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding  
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and  
specificallydisclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola  
datasheetsand/orspecificationscananddovaryindifferentapplicationsandactualperformancemayvaryovertime. Alloperatingparameters,including“Typicals”  
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of  
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other  
applicationsintended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury  
ordeathmayoccur. ShouldBuyerpurchaseoruseMotorolaproductsforanysuchunintendedorunauthorizedapplication,BuyershallindemnifyandholdMotorola  
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees  
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that  
Motorola was negligent regarding the design or manufacture of the part. Motorola and  
Opportunity/Affirmative Action Employer.  
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal  
How to reach us:  
USA/EUROPE/Locations Not Listed: Motorola Literature Distribution;  
P.O. Box 5405, Denver, Colorado 80217. 1–800–441–2447  
JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, 6F Seibu–Butsuryu–Center,  
3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–81–3521–8315  
Mfax : RMFAX0@email.sps.mot.com – TOUCHTONE 602–244–6609  
INTERNET: http://Design–NET.com  
ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,  
51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298  
MC74LCX16646/D  
◊

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