SEMICONDUCTOR TECHNICAL DATA
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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 VI specification of 5.5V allows MC74LCX16646 inputs to
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.
•
•
•
•
•
•
•
•
•
Designed for 2.7 to 3.6V VCC Operation
5.2ns Maximum tpd
5V Tolerant — Interface Capability With 5V TTL Logic
Supports Live Insertion and Withdrawal
IOFF Specification Guarantees High Impedance When VCC = 0V
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
LOW–VOLTAGE CMOS
16–BIT TRANSCEIVER/
REGISTERED TRANSCEIVER
DT SUFFIX
PLASTIC TSSOP PACKAGE
CASE 1202–01
PIN NAMES
Pins
Function
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
This document contains information on a new product. Specifications and information herein are subject to
change without notice.
11/96
Motorola, Inc. 1996
1
REV 0.2
MC74LCX16646
DIR1 1
56 OE1
CAB1 2
55 CBA1
SAB1 3
54 SBA1
GND 4
53 GND
A0 5
52 B0
A1 6
51 B1
VCC 7
50 VCC
A2 8
49 B2
A3 9
48 B3
A4 10
47 B4
GND 11
MOTOROLA
46 GND
A5 12
45 B5
A6 13
44 B6
A7 14
43 B7
A8 15
42 B8
A9 16
41 B9
A10 17
40 B10
GND 18
39 GND
A11 19
38 B11
A12 20
37 B12
A13 21
36 B13
VCC 22
35 VCC
A14 23
34 B14
A15 24
33 B15
GND 25
32 GND
SAB2 26
31 SBA2
CAB2 27
30 CBA2
DIR2 28
29 OE2
2
LCX DATA
BR1339 — REV 3
MC74LCX16646
CBA1
DIR1
OE1
SBA1
SAB1
CAB1
LOGIC DIAGRAM
55
1
56
54
3
2
C
Q
A0:7
D
C
Q
B0:7
D
1 of 8 Channels
To 7 Other Channels
CBA2
DIR2
OE2
SBA2
SAB2
CAB2
30
28
29
31
26
27
C
Q
A8:15
D
C
Q
B8:15
D
1 of 8 Channels
To 7 Other Channels
LCX DATA
BR1339 — REV 3
3
MOTOROLA
MC74LCX16646
BUS APPLICATIONS
BUS A
BUS A
OE
DIR
CAB
CBA
SAB
SBA
OE
DIR
CAB
CBA
SAB
SBA
L
L
X
X
X
L
L
H
X
X
L
X
BUS A
BUS A
BUS B
Transfer Storage Data to Bus A
or Bus B
BUS B
Store Data from Bus A, Bus B or
Busses A and B
MOTOROLA
BUS B
Real Time Transfer – Bus A to
Bus B
BUS B
Real Time Transfer – Bus B to
Bus A
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
H or L
X
X
H
H
X
4
LCX DATA
BR1339 — REV 3
MC74LCX16646
FUNCTION TABLE
Inputs
OEn
DIRn
H
X
L
CABn
Data Ports
CBAn
SABn
SBAn
Bn
Input
Input
Operating Mode
↑
↑
X
X
X
X
Isolation, Hold Storage
↑
↑
X
X
l
h
X
X
X
X
l
h
Store A and/or B Data
Input
Output
↑
X*
L
X
L
H
L
H
H
X
X
QA
L
X
l
h
L
H
H
X
L
H
QA
QA
Output
Input
X
L
L
H
L
H
Real Time B Data to A Bus
X
H
QB
X
Stored B Data to A Bus
X
L
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
↑
L
An
X*
L
X*
X*
↑
↑
Real Time A Data to B Bus
Stored A Data to B Bus
Real Time A Data to B Bus; Store A Data
Clock A Data to B Bus; Store A 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
Time Prior to the Low–to–High Clock Transition; X = Don’t Care; ↑ = Low–to–High Clock Transition; ↑ = NOT Low–to–High Clock Transition; QA = A input storage register;
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 ICC reasons, Do Not Float Inputs.
ABSOLUTE MAXIMUM RATINGS*
Symbol
Parameter
VCC
DC Supply Voltage
VI
DC Input Voltage
VO
DC Output Voltage
Value
Condition
Unit
–0.5 to +7.0
V
–0.5 ≤ VI ≤ +7.0
V
–0.5 ≤ VO ≤ +7.0
Output in 3–State
V
–0.5 ≤ VO ≤ VCC + 0.5
Note 1.
V
IIK
DC Input Diode Current
–50
VI < GND
mA
IOK
DC Output Diode Current
–50
VO < GND
mA
+50
VO > VCC
mA
IO
DC Output Source/Sink Current
±50
mA
ICC
DC Supply Current Per Supply Pin
±100
mA
IGND
DC Ground Current Per Ground Pin
±100
mA
TSTG
Storage Temperature Range
–65 to +150
°C
* Absolute maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions
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. IO absolute maximum rating must be observed.
LCX DATA
BR1339 — REV 3
5
MOTOROLA
MC74LCX16646
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Operating
Data Retention Only
Min
Typ
Max
Unit
2.0
1.5
3.3
3.3
3.6
3.6
V
0
5.5
V
0
0
VCC
5.5
V
VCC
Supply Voltage
VI
Input Voltage
VO
Output Voltage
IOH
HIGH Level Output Current, VCC = 3.0V – 3.6V
–24
mA
IOL
LOW Level Output Current, VCC = 3.0V – 3.6V
24
mA
IOH
HIGH Level Output Current, VCC = 2.7V – 3.0V
–12
mA
IOL
LOW Level Output Current, VCC = 2.7V – 3.0V
12
mA
TA
Operating Free–Air Temperature
–40
+85
°C
∆t/∆V
Input Transition Rise or Fall Rate, VIN from 0.8V to 2.0V,
VCC = 3.0V
0
10
ns/V
(HIGH or LOW State)
(3–State)
DC ELECTRICAL CHARACTERISTICS
TA = –40°C to +85°C
Symbol
Characteristic
Condition
Min
2.0
VIH
HIGH Level Input Voltage (Note 2.)
2.7V ≤ VCC ≤ 3.6V
VIL
LOW Level Input Voltage (Note 2.)
2.7V ≤ VCC ≤ 3.6V
VOH
HIGH Level Output Voltage
VOL
LOW Level Output Voltage
Max
V
0.8
2.7V ≤ VCC ≤ 3.6V; IOH = –100µA
VCC – 0.2
VCC = 2.7V; IOH = –12mA
2.2
VCC = 3.0V; IOH = –18mA
2.4
VCC = 3.0V; IOH = –24mA
2.2
Unit
V
V
2.7V ≤ VCC ≤ 3.6V; IOL = 100µA
0.2
VCC = 2.7V; IOL= 12mA
0.4
VCC = 3.0V; IOL = 16mA
0.4
VCC = 3.0V; IOL = 24mA
0.55
V
II
Input Leakage Current
2.7V ≤ VCC ≤ 3.6V; 0V ≤ VI ≤ 5.5V
±5.0
µA
IOZ
3–State Output Current
2.7 ≤ VCC ≤ 3.6V; 0V ≤ VO ≤ 5.5V;
VI = VIH or V IL
±5.0
µA
IOFF
Power–Off Leakage Current
VCC = 0V; VI or VO = 5.5V
10
µA
ICC
Quiescent Supply Current
2.7 ≤ VCC ≤ 3.6V; VI = GND or VCC
20
µA
2.7 ≤ VCC ≤ 3.6V; 3.6 ≤ VI or VO ≤ 5.5V
±20
µA
500
µA
∆ICC
Increase in ICC per Input
2.7 ≤ VCC ≤ 3.6V; VIH = VCC – 0.6V
2. These values of VI are used to test DC electrical characteristics only.
MOTOROLA
6
LCX DATA
BR1339 — REV 3
MC74LCX16646
AC CHARACTERISTICS (Note 3.; tR = tF = 2.5ns; CL = 50pF; RL = 500Ω)
Limits
TA = –40°C to +85°C
VCC = 3.0V to 3.6V
Symbol
Parameter
Waveform
Min
Max
VCC = 2.7V
Min
Max
Unit
fmax
Clock Pulse Frequency
3
170
MHz
tPLH
tPHL
Propagation Delay
Input to Output
1
1.5
1.5
5.2
5.2
1.5
1.5
6.0
6.0
ns
tPLH
tPHL
Propagation Delay
Clock to Output
3
1.5
1.5
6.0
6.0
1.5
1.5
7.0
7.0
ns
tPLH
tPHL
Propagation Delay
Select to Output
1
1.5
1.5
6.0
6.0
1.5
1.5
7.0
7.0
ns
tPZH
tPZL
Output Enable Time to
High and Low Level
2
1.5
1.5
7.5
7.5
1.5
1.5
8.5
8.5
ns
tPHZ
tPLZ
Output Disable Time From
High and Low Level
2
1.5
1.5
6.5
6.5
1.5
1.5
7.5
7.5
ns
ts
Setup Time, HIGH or LOW Data to Clock
3
2.5
2.5
ns
th
Hold Time, HIGH or LOW Data to Clock
3
1.5
1.5
ns
tw
Clock Pulse Width, HIGH or LOW
3
3.0
3.0
ns
tOSHL
tOSLH
Output–to–Output Skew
(Note 4.)
1.0
1.0
ns
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 (tOSHL) or LOW–to–HIGH (tOSLH); parameter
guaranteed by design.
DYNAMIC SWITCHING CHARACTERISTICS
TA = +25°C
Symbol
Characteristic
Condition
VOLP
Dynamic LOW Peak Voltage (Note 5.)
VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V
Min
Typ
0.8
Max
Unit
V
VOLV
Dynamic LOW Valley Voltage (Note 5.)
VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V
0.8
V
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
Condition
Typical
Unit
CIN
Input Capacitance
VCC = 3.3V, VI = 0V or VCC
7
pF
CI/O
Input/Output Capacitance
VCC = 3.3V, VI = 0V or VCC
8
pF
CPD
Power Dissipation Capacitance
10MHz, VCC = 3.3V, VI = 0V or VCC
20
pF
LCX DATA
BR1339 — REV 3
7
MOTOROLA
MC74LCX16646
2.7V
An, Bn,
SBAn, SABn
1.5V
0V
tPLH, tPHL
VOH
Bn, An
1.5V
VOL
WAVEFORM 1 – SAB to B and SBA to A, An to Bn PROPAGATION DELAYS
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
2.7V
OEn
1.5V
1.5V
0V
DIRn
tPZH
tPHZ
VOH – 0.3V
1.5V
An, Bn
≈ 0V
tPZL
An, Bn
tPLZ
≈ 3.0V
1.5V
VOL + 0.3V
WAVEFORM 2 – OE/DIR to An/Bn OUTPUT ENABLE AND DISABLE TIMES
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
Figure 1. AC Waveforms
MOTOROLA
8
LCX DATA
BR1339 — REV 3
MC74LCX16646
2.7V
An, Bn
1.5V
0V
ts
th
2.7V
CABn,
CBAn
tw
1.5V
1.5V
0V
fmax
tPLH, tPHL
VOH
Bn, An
1.5V
VOL
WAVEFORM 3 – CLOCK to Bn/An PROPAGATION DELAYS, CLOCK MINIMUM PULSE WIDTH,
An/Bn to CLOCK SETUP AND HOLD TIMES
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns except when noted
tw
NEGATIVE
PULSE
1.5V
1.5V
POSITIVE
PULSE
1.5V
1.5V
tw
WAVEFORM 4 – INPUT PULSE DEFINITION
tR = tF = 2.5ns, 10% to 90% of 0V to 2.7V
Figure 1. AC Waveforms (continued)
VCC
PULSE
GENERATOR
R1
DUT
CL
RT
TEST
6V
OPEN
GND
RL
SWITCH
tPLH, tPHL
Open
tPZL, tPLZ
6V
Open Collector/Drain tPLH and tPHL
6V
tPZH, tPHZ
GND
CL = 50pF or equivalent (Includes jig and probe capacitance)
RL = R1 = 500Ω or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
Figure 2. Test Circuit
LCX DATA
BR1339 — REV 3
9
MOTOROLA
MC74LCX16646
OUTLINE DIMENSIONS
DT SUFFIX
PLASTIC TSSOP PACKAGE
CASE 1202–01
ISSUE A
56X
K REF
0.12 (0.005)
M
T U
S
V
K
K1
S
T U
S
J J1
29
0.254 (0.010)
M
56
SECTION N–N
B
–U–
L
ÉÉÉ
ÇÇÇ
ÇÇÇ
ÉÉÉ
1
N
28
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
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.
6. DIMENSIONS A AND B ARE TO BE
DETERMINED AT DATUM PLANE –W–.
A
–V–
PIN 1
IDENT.
N
F
DETAIL E
D
C
0.25 (0.010)
–W–
0.076 (0.003)
–T– SEATING
PLANE
M
DETAIL E
DIM
A
B
C
D
F
G
H
J
J1
K
K1
L
M
MILLIMETERS
MIN
MAX
13.90
14.10
6.00
6.20
–––
1.10
0.05
0.15
0.50
0.75
0.50 BSC
0.12
–––
0.09
0.20
0.09
0.16
0.17
0.27
0.17
0.23
7.95
8.25
0_
8_
INCHES
MIN
MAX
0.547
0.555
0.236
0.244
–––
0.043
0.002
0.006
0.020
0.030
0.0197 BSC
0.005
–––
0.004
0.008
0.004
0.006
0.007
0.011
0.007
0.009
0.313
0.325
0_
8_
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
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, 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
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applications intended 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
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are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Affirmative Action Employer.
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: [email protected] – TOUCHTONE 602–244–6609
INTERNET: http://Design–NET.com
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51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298
◊
MOTOROLA
10
MC74LCX16646/D
LCX DATA
BR1339 — REV 3