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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Low-Voltage CMOS Octal Transceiver
With 5V-Tolerant Inputs and Outputs (3-State, Non-Inverting)
The MC74LCX245 is a high performance, non-inverting octal transceiver operating from a 2.7 to 3.6V supply. 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 MC74LCX245 inputs to be safely driven from 5V devices. The MC74LCX245 is suitable for memory address driving and all TTL level bus oriented transceiver applications. Current drive capability is 24mA at both A and B ports. The Transmit/Receive (T/R) input determines 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 input, when HIGH, disables both A and B ports by placing them in a HIGH Z condition.
MC74LCX245
LOW-VOLTAGE CMOS OCTAL TRANSCEIVER
20 1
DW SUFFIX PLASTIC SOIC CASE 751D-04
* * * * * * * *
Designed for 2.7 to 3.6V VCC Operation 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 (10A) Substantially Reduces System Power Requirements
20 1 20 1
M SUFFIX PLASTIC SOIC EIAJ CASE 967-01
SD SUFFIX PLASTIC SSOP CASE 940C-03
* Latchup Performance Exceeds 500mA * ESD Performance: Human Body Model >2000V; Machine Model >200V
20
1
DT SUFFIX PLASTIC TSSOP CASE 948E-02
Pinout: 20-Lead (Top View)
VCC 20 OE 19 B0 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11
PIN NAMES
Pins OE T/R A0-A7 B0-B7 Function Output Enable Input Transmit/Receive Input Side A 3-State Inputs or 3-State Outputs Side B 3-State Inputs or 3-State Outputs
1 T/R
2 A0
3 A1
4 A2
5 A3
6 A4
7 A5
8 A6
9 A7
10 GND
9/95
(c) Motorola, Inc. 1996
1
REV 3
MC74LCX245
LOGIC DIAGRAM
OE 19 T/R 1 2 18 A1 3 17 A2 4 16 A3 5 15 A4 6 14 A5 7 13 A6 8 12 A7 9 11
A0
B0
B1
B2
B3
B4
B5
B6
B7
INPUTS OE L L H T/R L H X OPERATING MODE Non-Inverting B Data to A Bus A Data to B Bus Z
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 3
MC74LCX245
ABSOLUTE MAXIMUM RATINGS*
Symbol VCC VI VO Parameter DC Supply Voltage DC Input Voltage DC Output Voltage Value -0.5 to +7.0 -0.5 VI +7.0 -0.5 VO +7.0 -0.5 VO VCC + 0.5 IIK IOK DC Input Diode Current DC Output Diode Current -50 -50 +50 IO ICC IGND TSTG DC Output Source/Sink Current DC Supply Current Per Supply Pin DC Ground Current Per Ground Pin Storage Temperature Range 50 100 100 -65 to +150 Output in 3-State Note 1. VI < GND VO < GND VO > VCC Condition Unit V V V V mA mA mA mA mA mA 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 VCC VI VO IOH IOL IOH IOL TA t/V Supply Voltage Input Voltage Output Voltage (HIGH or LOW State) (3-State) Parameter Operating Data Retention Only Min 2.0 1.5 0 0 0 Typ 3.3 3.3 Max 3.6 3.6 5.5 VCC 5.5 -24 24 -12 12 -40 0 +85 10 Unit V V V mA mA mA mA C ns/V
HIGH Level Output Current, VCC = 3.0V - 3.6V LOW Level Output Current, VCC = 3.0V - 3.6V HIGH Level Output Current, VCC = 2.7V - 3.0V LOW Level Output Current, VCC = 2.7V - 3.0V Operating Free-Air Temperature Input Transition Rise or Fall Rate, VIN from 0.8V to 2.0V, VCC = 3.0V
DC ELECTRICAL CHARACTERISTICS
TA = -40C to +85C Symbol VIH VIL VOH Characteristic HIGH Level Input Voltage (Note 2.) LOW Level Input Voltage (Note 2.) HIGH Level Output Voltage Condition 2.7V VCC 3.6V 2.7V VCC 3.6V 2.7V VCC 3.6V; IOH = -100A VCC = 2.7V; IOH = -12mA VCC = 3.0V; IOH = -18mA VCC = 3.0V; IOH = -24mA VOL LOW Level Output Voltage 2.7V VCC 3.6V; IOL = 100A VCC = 2.7V; IOL= 12mA VCC = 3.0V; IOL = 16mA VCC = 3.0V; IOL = 24mA 2. These values of VI are used to test DC electrical characteristics only. VCC - 0.2 2.2 2.4 2.2 0.2 0.4 0.4 0.55 V Min 2.0 0.8 Max Unit V V V
LCX DATA BR1339 -- REV 3
3
MOTOROLA
MC74LCX245
DC ELECTRICAL CHARACTERISTICS (continued)
TA = -40C to +85C Symbol II IOZ IOFF ICC ICC Characteristic Input Leakage Current 3-State Output Current Power-Off Leakage Current Quiescent Supply Current Condition 2.7V VCC 3.6V; 0V VI 5.5V 2.7 VCC 3.6V; 0V VO 5.5V; VI = VIH or V IL VCC = 0V; VI or VO = 5.5V 2.7 VCC 3.6V; VI = GND or VCC 2.7 VCC 3.6V; 3.6 VI or VO 5.5V Increase in ICC per Input 2.7 VCC 3.6V; VIH = VCC - 0.6V Min Max 5.0 5.0 10 10 10 500 Unit A A A A A A
AC CHARACTERISTICS (tR = tF = 2.5ns; CL = 50pF; RL = 500)
Limits TA = -40C to +85C VCC = 3.0V to 3.6V Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ tOSHL tOSLH Propagation Delay Input to Output Output Enable Time to High and Low Level Output Disable Time From High and Low Level Output-to-Output Skew (Note 3.) Parameter Waveform 1 2 2 Min 1.5 1.5 1.5 1.5 1.5 1.5 Max 7.0 7.0 8.5 8.5 7.5 7.5 1.0 1.0 VCC = 2.7V Max 8.0 8.0 9.5 9.5 8.5 8.5 Unit ns ns ns 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 = +25C Symbol VOLP VOLV Characteristic Dynamic LOW Peak Voltage (Note 4.) Dynamic LOW Valley Voltage (Note 4.) Condition VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V Min Typ 0.8 0.8 Max Unit V 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 CIN CI/O CPD Parameter Input Capacitance Input/Output Capacitance Power Dissipation Capacitance Condition VCC = 3.3V, VI = 0V or VCC VCC = 3.3V, VI = 0V or VCC 10MHz, VCC = 3.3V, VI = 0V or VCC Typical 7 8 25 Unit pF pF pF
MOTOROLA
4
LCX DATA BR1339 -- REV 3
MC74LCX245
2.7V An, Bn 1.5V 1.5V 0V tPLH Bn, An 1.5V tPHL VOH 1.5V VOL WAVEFORM 1 - PROPAGATION DELAYS tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
2.7V OE, T/R 1.5V 1.5V 0V tPZH An, Bn 1.5V 0V tPZL 1.5V VOL + 0.3V GND WAVEFORM 2 - OUTPUT ENABLE AND DISABLE TIMES tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns tPLZ 3.0V tPHZ VCC VOH - 0.3V
An, Bn
Figure 1. AC Waveforms
VCC 6V OPEN GND
PULSE GENERATOR RT
DUT CL
R1 RL
TEST tPLH, tPHL tPZL, tPLZ Open Collector/Drain tPLH and tPHL tPZH, tPHZ
SWITCH Open 6V 6V GND
CL = 50pF or equivalent (Includes jig and probe capacitance) RL = R1 = 500 or equivalent RT = ZOUT of pulse generator (typically 50)
Figure 2. Test Circuit
LCX DATA BR1339 -- REV 3
5
MOTOROLA
MC74LCX245
OUTLINE DIMENSIONS
DW SUFFIX PLASTIC SOIC PACKAGE CASE 751D-04 ISSUE E -A -
20 11 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.150 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN EXCESS OF D DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A B C D F G J K M P R MILLIMETERS MIN MAX 12.65 12.95 7.40 7.60 2.35 2.65 0.35 0.49 0.50 0.90 1.27 BSC 0.25 0.32 0.10 0.25 0 7 10.05 10.55 0.25 0.75 INCHES MIN MAX 0.499 0.510 0.292 0.299 0.093 0.104 0.014 0.019 0.020 0.035 0.050 BSC 0.010 0.012 0.004 0.009 0 7 0.395 0.415 0.010 0.029
-B -
1 10
P 10 PL 0.010 (0.25)
M
B
M
D
20 PL
J
M
0.010 (0.25)
T
A
S
B
S
F R X 45 C -T G
18 PL SEATING - PLANE
K
M
M SUFFIX PLASTIC SOIC EIAJ PACKAGE CASE 967-01 ISSUE O
NOTES: 1 DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2 CONTROLLING DIMENSION: MILLIMETER. 3 DIMENSIONS D AND E DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS AND ARE MEASURED AT THE PARTING LINE. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 4 TERMINAL NUMBERS ARE SHOWN FOR REFERENCE ONLY. 5 THE LEAD WIDTH DIMENSION (b) DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN EXCESS OF THE LEAD WIDTH DIMENSION AT MAXIMUM MATERIAL CONDITION. DAMBAR CANNOT BE LOCATED ON THE LOWER RADIUS OR THE FOOT. MINIMUM SPACE BETWEEN PROTRUSIONS AND ADJACENT LEAD TO BE 0.46 ( 0.018). DIM A A1 b c D E e HE L LE M Q1 Z MILLIMETERS MIN MAX --2.05 0.05 0.20 0.35 0.50 0.18 0.27 12.35 12.80 5.10 5.45 1.27 BSC 7.40 8.20 0.50 0.85 1.10 1.50 10 _ 0_ 0.70 0.90 --0.81 INCHES MIN MAX --0.081 0.002 0.008 0.014 0.020 0.007 0.011 0.486 0.504 0.201 0.215 0.050 BSC 0.291 0.323 0.020 0.033 0.043 0.059 10 _ 0_ 0.028 0.035 --0.032
20
11
LE Q1 E HE M_ L DETAIL P
1
10
Z D e A VIEW P
c
b 0.13 (0.005)
M
A1 0.10 (0.004)
MOTOROLA
6
LCX DATA BR1339 -- REV 3
MC74LCX245
OUTLINE DIMENSIONS
SD SUFFIX PLASTIC SSOP PACKAGE CASE 940C-03 ISSUE B
20X
K REF 0.12 (0.005)
M
TU
S
V
S
0.25 (0.010) N
L/2 L
PIN 1 IDENT
20
11
M B N F
1
10
DETAIL E K -U- J
A -V- 0.20 (0.008)
M
NOTES: 13 DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 14 CONTROLLING DIMENSION: MILLIMETER. 15 DIMENSION A DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH OR GATE BURRS SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 16 DIMENSION B DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 17 DIMENSION K DOES NOT INCLUDE DAMBAR PROTRUSION/INTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN EXCESS OF K DIMENSION AT MAXIMUM MATERIAL CONDITION. DAMBAR INTRUSION SHALL NOT REDUCE DIMENSION K BY MORE THAN 0.07 (0.002) AT LEAST MATERIAL CONDITION. 18 TERMINAL NUMBERS ARE SHOWN FOR REFERENCE ONLY. 19 DIMENSION A AND B ARE TO BE DETERMINED AT DATUM PLANE -W-. DIM A B C D F G H J J1 K K1 L M MILLIMETERS MIN MAX 7.07 7.33 5.20 5.38 1.73 1.99 0.05 0.21 0.63 0.95 0.65 BSC 0.59 0.75 0.09 0.20 0.09 0.16 0.25 0.38 0.25 0.33 7.65 7.90 0_ 8_ INCHES MIN MAX 0.278 0.288 0.205 0.212 0.068 0.078 0.002 0.008 0.024 0.037 0.026 BSC 0.023 0.030 0.003 0.008 0.003 0.006 0.010 0.015 0.010 0.013 0.301 0.311 0_ 8_
TU
S
SECTION N-N -W-
0.076 (0.003) -T-
SEATING PLANE
C D G H
DETAIL E
20X
K REF
M
DT SUFFIX PLASTIC TSSOP PACKAGE CASE 948E-02 ISSUE A TU
S
0.15 (0.006) T U
S
0.10 (0.004)
V
S
2X
L/2
20
11
B L
PIN 1 IDENT 1 10
J J1
-U-
N 0.15 (0.006) T U
S
A -V- N F
C D 0.100 (0.004) -T- SEATING
PLANE
G
H
DETAIL E
LCX DATA BR1339 -- REV 3
7
IIII IIII IIII
SECTION N-N
DETAIL E -W-
EEE CCC EEE CCC
K1 K K1 M
J1
0.25 (0.010)
NOTES: 6 DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 7 CONTROLLING DIMENSION: MILLIMETER. 8 DIMENSION A DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH OR GATE BURRS SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 9 DIMENSION B DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.25 (0.010) PER SIDE. 10 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. 11 TERMINAL NUMBERS ARE SHOWN FOR REFERENCE ONLY. 12 DIMENSION A AND B ARE TO BE DETERMINED AT DATUM PLANE -W-. MILLIMETERS MIN MAX 6.40 6.60 4.30 4.50 --- 1.20 0.05 0.15 0.50 0.75 0.65 BSC 0.27 0.37 0.09 0.20 0.09 0.16 0.19 0.30 0.19 0.25 6.40 BSC 0_ 8_ INCHES MIN MAX 0.252 0.260 0.169 0.177 --- 0.047 0.002 0.006 0.020 0.030 0.026 BSC 0.011 0.015 0.004 0.008 0.004 0.006 0.007 0.012 0.007 0.010 0.252 BSC 0_ 8_
DIM A B C D F G H J J1 K K1 L M
MOTOROLA
MC74LCX245
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MOTOROLA 8
MC74LCX245/D LCX DATA BR1339 -- REV 3

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