MOTOROLA MC74F2245

SEMICONDUCTOR TECHNICAL DATA
Ω " ! ! ! The MC74F2245 is designed for asynchronous communication
between data buses. The device transmits data from the A bus to the B
bus or from the B bus to the A bus depending upon the logic level at the
direction control (DIR) input. The output enable (OE) input disables the
device so the buses are effectively isolated.
25Ω OCTAL BIDIRECTIONAL
TRANSCEIVER WITH 3–STATE
INPUTS AND OUTPUTS
Both A and B outputs can sink up to 12mA; 25Ω resistors are included
in the lower output circuit to reduce overshoot and undershoot.
FAST SCHOTTKY TTL
The MC74F2245 is characterized for operation from 0°C to 70°C.
• 3–State Outputs Drive Bus Lines or Buffer Memory Address Registers
• Package Options Include Plastic SOIC (DW–Suffix) and Plastic SSOP
(SD–Suffix)
CONNECTION DIAGRAM (TOP VIEW)
VCC
20
OE
19
B0
18
B1
17
B2
16
B3
15
B4
14
B5
13
B6
12
DW SUFFIX
PLASTIC SOIC
CASE 751D–04
B7
11
SD SUFFIX*
PLASTIC SSOP
CASE 940C–03
1
2
3
4
5
6
7
8
9
10
T/R
A0
A1
A2
A3
A4
A5
A6
A7
GND
*Thermal Mounting Techniques are
Recommended. Please refer to Motorola
Application Note AN1567/D.
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
4.5
5.0
5.5
V
0
25
70
°C
VCC
Supply Voltage
TA
Operating Ambient Temperature Range
IOH
Output Current — High
Outputs
–3.0
mA
IOL
Output Current — Low
Outputs
12
mA
2/96
 Motorola, Inc. 1996
1
REV 0
MC74F2245
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Min
Typ
Max
2.0
Unit
Test Conditions
VIH
Input HIGH Voltage
V
Guaranteed Input HIGH Voltage
VIL
Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage
VIK
Input Clamp Diode Voltage
–1.2
V
IIN = –18 mA
VCC = MIN
VOH
Output HIGH Voltage, Outputs
V
IOH = –1.0 mA
VCC = 4.50 V
2.5
2.4
3.0
V
IOH = –3.0 mA
VCC = 4.50 V
2.7
3.2
V
IOH = –3.0 mA
VCC = 4.75 V
VOL
Output LOW Voltage, Outputs
0.2
0.5
V
IOL = 1 mA
VCC = MIN
VOL
Output LOW Voltage, Outputs
0.5
0.75
V
IOL = 12 mA
VCC = MIN
IOZH + IIH
Output Off Current HIGH
70
µA
VOUT = 2.7 V
VCC = MAX
IOZL + IIL
Output Off Current LOW
–650
mA
VOUT = 0.5 V
VCC = MAX
OE, T/R Inputs
20
µA
VIN = 2.7 V
IIH
Input HIGH Current
OE, T/R Inputs
100
µA
VIN = 7.0 V
An, Bn Inputs
1.0
mA
VIN = 5.5 V
T/R Input
–0.8
mA
–1.2
mA
VIN = 0.5 V
VCC = MAX
VCC = MAX
IIL
Input LOW Current
OE Input
IOS
Output Short Circuit
An Outputs
–60
–150
mA
VOUT = GND
VCC = MAX
Current (Note 2)
Bn Outputs
–100
–225
mA
VOUT = GND
VCC = MAX
ICCH
Power Supply Current HIGH
90
mA
VCC = MAX, Outputs HIGH
ICCL
Power Supply Current LOW
120
mA
VCC = MAX, Outputs LOW
ICCZ
Power Supply Current OFF
110
mA
VCC = MAX, Outputs OFF
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable device type.
2. Not more than one output should be shorted at a time.
AC CHARACTERISTICS
Symbol
Parameter
TA = +25°C
TA = 0°C to +70°C
VCC = +5.0 V
VCC = 5.0 V ± 10%
CL = 50 pF
CL = 50 pF
Min
Max
Min
Max
Unit
tPLH
tPHL
Propagation Delay
An to Bn or Bn to An
2.5
2.5
6.0
6.6
2.5
2.5
7.0
7.1
ns
tPZH
tPZL
Output Enable Time
3.0
3.5
7.3
10.6
3.0
3.5
8.5
12.0
ns
tPHZ
tPLZ
Output Disable Time
2.5
2.0
6.5
6.5
2.5
2.0
7.5
7.5
ns
MOTOROLA
2
TIMING SOLUTIONS
BR1333 — REV 5
MC74F2245
3.0V
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
3.0V
1.5V
1.5V
OE, T/R
0V
tPHZ
tPZH
VOH
VOH – 0.3V
1.5V
An, Bn
≈ 0V
tPZL
tPLZ
≈ 3.5V
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
7V
OPEN
RL
SWITCH
tPLH, tPHL
Open
tPZL, tPLZ
7V
tPZH, tPHZ
Open
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
TIMING SOLUTIONS
BR1333 — REV 5
3
MOTOROLA
MC74F2245
OUTLINE DIMENSIONS
SD SUFFIX
PLASTIC SSOP PACKAGE
CASE 940C–03
ISSUE B
20X
K REF
0.12 (0.005)
M
T U
S
V
S
0.25 (0.010)
N
L/2
20
11
M
B
L
PIN 1
IDENT
1
N
F
10
ÉÉÉ
ÇÇÇ
ÇÇÇ
ÉÉÉ
ÇÇÇ
ÉÉÉ
ÇÇÇ
ÉÉÉ
DETAIL E
–U–
A
–V–
0.20 (0.008)
M
T U
K
J
S
J1
K1
SECTION N–N
0.076 (0.003)
–T–
SEATING
PLANE
–W–
C
D
G
H
MOTOROLA
DETAIL E
4
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. 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.
4. DIMENSION B DOES NOT INCLUDE INTERLEAD
FLASH OR PROTRUSION. INTERLEAD FLASH OR
PROTRUSION SHALL NOT EXCEED 0.15 (0.006)
PER SIDE.
5. 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.
6. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
7. 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_
TIMING SOLUTIONS
BR1333 — REV 5
MC74F2245
OUTLINE DIMENSIONS
DW SUFFIX
PLASTIC SOIC PACKAGE
CASE 751D–04
ISSUE E
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.
–A–
20
11
–B–
10X
P
0.010 (0.25)
1
M
B
M
10
20X
D
0.010 (0.25)
M
T A
B
S
J
S
F
R X 45 _
C
–T–
18X
G
SEATING
PLANE
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
M
K
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 can and do vary in different
applications. 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 others. Motorola products are not designed, intended, or authorized for use as components in
systems intended for surgical implant into the body, or other 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 or death may occur. Should Buyer purchase or use Motorola products for any such
unintended or unauthorized application, Buyer shall indemnify and hold Motorola 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
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
How to reach us:
USA/EUROPE: Motorola Literature Distribution;
P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447
JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, Toshikatsu Otsuki,
6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–3521–8315
MFAX: [email protected] –TOUCHTONE (602) 244–6609
INTERNET: http://Design–NET.com
HONG KONG: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,
51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298
TIMING SOLUTIONS
BR1333 — REV 5
◊
5
*MC74F2245/D*
MC74F2245/D
MOTOROLA