SEMICONDUCTOR TECHNICAL DATA
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The MC74LCX16245 is a high performance, non–inverting 16–bit
transceiver operating from a 2.7 to 3.6V supply. The device is byte
controlled. Each byte has separate Output Enable 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 MC74LCX16245 inputs to be safely driven
from 5V devices. The MC74LCX16245 is suitable for memory address
driving and all TTL level bus oriented transceiver applications.
4.5ns maximum propagation delays support high performance
applications. Current drive capability is 24mA at both A and B ports. The
Transmit/Receive (T/Rn) inputs determine the direction of data flow
through the bi–directional transceiver. Transmit (active–HIGH) enables
data from A ports to B ports; Receive (active–LOW) enables data from B
to A ports. The Output Enable inputs (OEn), when HIGH, disable both A
and B ports by placing them in a HIGH Z condition.
•
•
•
•
•
•
•
•
•
LOW–VOLTAGE
CMOS 16–BIT TRANSCEIVER
Designed for 2.7 to 3.6V VCC Operation
DT SUFFIX
PLASTIC TSSOP PACKAGE
CASE 1201–01
4.5ns 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
PIN NAMES
Pins
Function
OEn
T/Rn
A0–A15
B0–B15
Output Enable Inputs
Transmit/Receive Inputs
Side A Inputs or 3–State Outputs
Side B Inputs or 3–State Outputs
9/96
Motorola, Inc. 1996
1
REV 1
MC74LCX16245
T/R1 1
48 OE1
B0 2
47 A0
B1 3
46 A1
GND 4
45 GND
B2 5
44 A2
B3 6
43 A3
VCC 7
1
24
T/R1
T/R2
OE1
48
OE2
25
42 VCC
B4 8
41 A4
B5 9
40 A5
GND 10
LOGIC DIAGRAM
A0:7
B0:7
A8:15
B8:15
39 GND
B6 11
38 A6
B7 12
37 A7
B8 13
36 A8
B9 14
35 A9
GND 15
34 GND
B10 16
33 A10
B11 17
32 A11
VCC 18
31 VCC
B12 19
30 A12
B13 20
29 A13
GND 21
28 GND
B14 22
27 A14
B15 23
26 A15
T/R2 24
25 OE2
One of Eight
Inputs
Inputs
OE1
T/R1
L
L
L
H
Outputs
Outputs
OE2
T/R2
Bus B0:7 Data to Bus A0:7
L
L
Bus B8:15 Data to Bus A8:15
H
Bus A0:7 Data to Bus B0:7
L
H
Bus A8:15 Data to Bus B8:15
X
High Z State on A0:7, B0:7
H
X
High Z State on A8:15, B8:15
H = High Voltage Level; L = Low Voltage Level; Z = High Impedance State; X = High or Low Voltage Level and Transitions Are Acceptable, for ICC
reasons, DO NOT FLOAT Inputs
MOTOROLA
2
LCX DATA
BR1339 — REV 2
MC74LCX16245
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.
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
∆t/∆V
Input Transition Rise or Fall Rate, VIN from 0.8V to 2.0V,
VCC = 3.0V
(HIGH or LOW State)
(3–State)
–40
+85
°C
0
10
ns/V
DC ELECTRICAL CHARACTERISTICS
TA = –40°C to +85°C
Symbol
Characteristic
VIH
HIGH Level Input Voltage (Note 2.)
VIL
LOW Level Input Voltage (Note 2.)
VOH
HIGH Level Output Voltage
VOL
LOW Level Output Voltage
Condition
Min
2.7V ≤ VCC ≤ 3.6V
2.0
2.7V ≤ VCC ≤ 3.6V
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
2. These values of VI are used to test DC electrical characteristics only.
LCX DATA
BR1339 — REV 2
3
MOTOROLA
MC74LCX16245
DC ELECTRICAL CHARACTERISTICS (continued)
TA = –40°C to +85°C
Symbol
Characteristic
Condition
Min
Max
Unit
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
2.7 ≤ VCC ≤ 3.6V; VIH = VCC – 0.6V
500
µA
∆ICC
Increase in ICC per Input
AC CHARACTERISTICS (tR = tF = 2.5ns; CL = 50pF; RL = 500Ω)
Limits
TA = –40°C to +85°C
VCC = 3.0V to 3.6V
Symbol
Parameter
VCC = 2.7V
Waveform
Min
Max
Max
Unit
tPLH
tPHL
Propagation Delay
Input to Output
1
1.5
1.5
4.5
4.5
5.2
5.2
ns
tPZH
tPZL
Output Enable Time to
High and Low Level
2
1.5
1.5
6.5
6.5
7.2
7.2
ns
tPHZ
tPLZ
Output Disable Time From
High and Low Level
2
1.5
1.5
6.4
6.4
6.9
6.9
ns
tOSHL
tOSLH
Output–to–Output Skew
(Note 3.)
1.0
1.0
ns
3. 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 4.)
VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V
Min
Typ
0.8
Max
Unit
V
VOLV
Dynamic LOW Valley Voltage (Note 4.)
VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V
0.8
V
4. 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
MOTOROLA
4
LCX DATA
BR1339 — REV 2
MC74LCX16245
2.7V
An, Bn
1.5V
1.5V
0V
tPLH
tPHL
VOH
1.5V
Bn, An
1.5V
VOL
WAVEFORM 1 – PROPAGATION DELAYS
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
2.7V
1.5V
OEn, T/Rn
0V
tPZH
tPHZ
VCC
VOH – 0.3V
1.5V
An, Bn
≈ 0V
tPZL
tPLZ
≈ 3.0V
1.5V
An, Bn
VOL + 0.3V
GND
WAVEFORM 2 – OUTPUT ENABLE AND DISABLE TIMES
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
Figure 1. AC Waveforms
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 2
5
MOTOROLA
MC74LCX16245
OUTLINE DIMENSIONS
DT SUFFIX
PLASTIC TSSOP PACKAGE
CASE 1201–01
ISSUE A
48X
K
K1
K REF
0.12 (0.005)
M
T U
S
V
ÉÉÉ
ÇÇÇ
ÇÇÇ
ÉÉÉ
S
T U
S
J J1
48
25
SECTION N–N
M
0.254 (0.010)
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–.
B
–U–
L
N
1
24
A
–V–
PIN 1
IDENT.
N
F
DETAIL E
D
C
M
0.25 (0.010)
–W–
0.076 (0.003)
–T– SEATING
DETAIL E
PLANE
G
DIM
A
B
C
D
F
G
H
J
J1
K
K1
L
M
MILLIMETERS
MIN
MAX
12.40
12.60
6.00
6.20
–––
1.10
0.05
0.15
0.50
0.75
0.50 BSC
0.37
–––
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
0.488
0.496
0.236
0.244
–––
0.043
0.002
0.006
0.020
0.030
0.0197 BSC
0.015
–––
0.004
0.008
0.004
0.006
0.007
0.011
0.007
0.009
0.313
0.325
0_
8_
H
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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
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◊
MOTOROLA
6
MC74LCX16245/D
LCX DATA
BR1339 — REV 2