SEMICONDUCTOR TECHNICAL DATA
Motorola, Inc. 1996 1
2/96
REV 0
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.
Both A and B outputs can sink up to 12mA; 25Ω resistors are included
in the lower output circuit to reduce overshoot and undershoot.
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)
111213141516171819
VCC
1 2 3 4 5 6 7
20
OE B0B1B2B4
B3
A1
T/R A0A2A3A5
A4
CONNECTION DIAGRAM (TOP VIEW)
8 9 10
B5B7
B6
A6GNDA7
GUARANTEED OPERATING RANGES
Symbol Parameter Min Typ Max Unit
VCC Supply Voltage 4.5 5.0 5.5 V
TAOperating Ambient Temperature Range 0 25 70 °C
IOH Output Current — High Outputs –3.0 mA
IOL Output Current — Low Outputs 12 mA
25Ω OCTAL BIDIRECTIONAL
TRANSCEIVER WITH 3–STATE
INPUTS AND OUTPUTS
FAST SCHOTTKY TTL
DW SUFFIX
PLASTIC SOIC
CASE 751D–04
SD SUFFIX*
PLASTIC SSOP
CASE 940C–03
*Thermal Mounting Techniques are
Recommended. Please refer to Motorola
Application Note AN1567/D.
MC74F2245
MOTOROLA TIMING SOLUTIONS
BR1333 — REV 5
2
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol Parameter Min Typ Max Unit Test Conditions
VIH Input HIGH Voltage 2.0 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 2.5 V IOH = –1.0 mA VCC = 4.50 V
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 VCC = MAX
An, Bn Inputs 1.0 mA VIN = 5.5 V
T/R Input –0.8 mA
IIL Input LOW Current OE Input –1.2 mA VIN = 0.5 V VCC = MAX
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
TA = +25°C TA = 0°C to +70°C
VCC = +5.0 V VCC = 5.0 V ± 10%
CL = 50 pF CL = 50 pF
Symbol Parameter Min Max Min Max Unit
tPLH
tPHL Propagation Delay
An to Bn or Bn to An2.5
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
MC74F2245
TIMING SOLUTIONS
BR1333 — REV 5 3 MOTOROLA
WAVEFORM 1 – PROPAGATION DELAYS
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
3.0V
0V
VOH
VOL
An, Bn
Bn, An
tPHL
tPLH
WAVEFORM 2 – OUTPUT ENABLE AND DISABLE TIMES
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
3.0V
0V
≈
0V
OE, T/R
An, Bn
tPZH
≈
3.5V
tPHZ
tPZL tPLZ
An, Bn
1.5V
1.5V
1.5V1.5V
1.5V 1.5V
Figure 1. AC Waveforms
1.5V
VOH
VOH – 0.3V
VOL + 0.3V
GND
1.5V
OPEN
PULSE
GENERATOR
RT
DUT
VCC
RL
R1
CL
7V
TEST 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
MC74F2245
MOTOROLA TIMING SOLUTIONS
BR1333 — REV 5
4
OUTLINE DIMENSIONS
SD SUFFIX
PLASTIC SSOP PACKAGE
CASE 940C–03
ISSUE B
20 11
101
H
A
B
F
M
K20X REF
S
U
M
0.12 (0.005) V S
T
L
L/2
PIN 1
IDENT
S
U
M
0.20 (0.008) T
–V– –U–
D
C
0.076 (0.003)
G
–T–
SEATING
PLANE
DETAIL E
N
N
0.25 (0.010)
ÇÇÇ
ÇÇÇ
ÇÇÇ
ÇÇÇ
ÉÉÉ
ÉÉÉ
ÉÉÉ
ÉÉÉ
K
JJ1
K1
SECTION N–N
DIM
AMIN MAX MIN MAX
INCHES
7.07 7.33 0.278 0.288
MILLIMETERS
B5.20 5.38 0.205 0.212
C1.73 1.99 0.068 0.078
D0.05 0.21 0.002 0.008
F0.63 0.95 0.024 0.037
G0.65 BSC 0.026 BSC
H0.59 0.75 0.023 0.030
J0.09 0.20 0.003 0.008
J1 0.09 0.16 0.003 0.006
K0.25 0.38 0.010 0.015
K1 0.25 0.33 0.010 0.013
_ _ _ _
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–.
L7.65 7.90 0.301 0.311
M0 8 0 8
DETAIL E
–W–
MC74F2245
TIMING SOLUTIONS
BR1333 — REV 5 5 MOTOROLA
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–
–B–
20
1
11
10
S
A
M
0.010 (0.25) B S
T
D20X
M
B
M
0.010 (0.25)
P10X
J
F
G
18X K
C
–T–
SEATING
PLANE
M
RX 45
_
DIM MIN MAX MIN MAX
INCHESMILLIMETERS
A12.65 12.95 0.499 0.510
B7.40 7.60 0.292 0.299
C2.35 2.65 0.093 0.104
D0.35 0.49 0.014 0.019
F0.50 0.90 0.020 0.035
G1.27 BSC 0.050 BSC
J0.25 0.32 0.010 0.012
K0.10 0.25 0.004 0.009
M0 7 0 7
P10.05 10.55 0.395 0.415
R0.25 0.75 0.010 0.029
_ _ _ _
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MC74F2245/D
*MC74F2245/D*
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