MC74F544DW データシートの表示（PDF） - Motorola => Freescale
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MC74F544DW Datasheet PDF : 4 Pages
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OCTAL REGISTERED
TRANSCEIVER, INVERTING,
3-STATE
The MC74F544 Octal Registered Transceivers contain two sets of D-Type
latches for temporary storage of data flowing in either direction. Separate
Latch Enable (LEAB, LEBA) and Enable (OEAB, OEBA) inputs are provided
for each register to permit independent control of inputting and outputting in
either direction of data flow. The MC74F544 has an inverting data path. The
A outputs are guaranteed to sink 24 mA while the B outputs are rated for
64 mA.
• Combines 74F245 and 74F373 Type Functions in One Chip
• 8-Bit Octal Transceiver
• Inverting
• Back-to-Back Registers for Storage
• Separate Controls for Data Flow in Each Direction
• Glitchless Outputs During 3-State Power Up or Power Down Operation
• High Impedance Outputs in Power Off State
• A Outputs Sink 24 mA and Source 3.0 mA
• B Outputs Sink 64 mA and Source 15 mA
• See F543 for Noninverting Version
• ESD Protection > 4000 Volts
VCC EBA B0
24 23 22
PIN ASSIGNMENT
B1 B2 B3 B4 B5 B6
21 20 19 18 17 16
B7 LEAB OEAB
15 14 13
1 2 3 4 5 6 7 8 9 10 11 12
LEBA OEBA A0 A1 A2 A3 A4 A5 A6 A7 EAB GND
MC74F544
OCTAL REGISTERED
TRANSCEIVER, INVERTING,
3-STATE
FAST™ SCHOTTKY TTL
24
1
N SUFFIX
PLASTIC
CASE 724-03
24
1
DW SUFFIX
SOIC
CASE 751E-03
ORDERING INFORMATION
MC74FXXXN Plastic
MC74FXXXDW SOIC
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC
TA
IOH
IOL
DC Supply Voltage
Operating Ambient Temperature Range
Output Current — High
Output Current — Low
Min
Typ
Max
Unit
74
4.5
5.0
5.5
V
74
0
25
70
°C
74
—
—
– 3.0 / – 15
mA
74
—
—
24 / 64
mA
FAST AND LS TTL DATA
4-216
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