MOTOROLA MC74F544DW

MC74F544
OCTAL REGISTERED
TRANSCEIVER, INVERTING,
3-STATE
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.
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FAST SCHOTTKY TTL
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
N SUFFIX
PLASTIC
CASE 724-03
24
1
DW SUFFIX
SOIC
CASE 751E-03
24
1
PIN ASSIGNMENT
VCC EBA
24
23
B0
B1
B2
B3
B4
B5
B6
B7 LEAB OEAB
22
21
20
19
18
17
16
15
14
13
ORDERING INFORMATION
MC74FXXXN
Plastic
MC74FXXXDW SOIC
1
2
3
LEBA OEBA A0
4
5
6
7
8
9
10
11
A1
A2
A3
A4
A5
A6
A7
EAB GND
12
GUARANTEED OPERATING RANGES
Min
Typ
Max
Unit
VCC
Symbol
DC Supply Voltage
Parameter
74
4.5
5.0
5.5
V
TA
Operating Ambient Temperature Range
74
0
25
70
°C
IOH
Output Current — High
74
—
—
– 3.0 / – 15
mA
IOL
Output Current — Low
74
—
—
24 / 64
mA
FAST AND LS TTL DATA
4-216
MC74F544
FUNCTION TABLE
Inputs
OEXX
EXX
LEXX
Data
Outputs
H
X
X
X
Z
Outputs disabled
Status
X
H
X
X
Z
Outputs disabled
L
L
↑
↑
L
L
l
h
Z
Z
Outputs disabled
Data latched
L
L
L
L
↑
↑
l
h
H
L
Data latched
L
L
L
L
L
L
L
H
H
L
Transparent
L
L
H
X
NC
Hold
H = HIGH voltage level: h = HIGH state must be present one set-up time before the LOW-to-HIGH transition of LEXX or EXX (XX = AB or BA): L = LOW voltage level:
l = LOW state must be present one set-up time before the LOW-to-HIGH transition of LEXX or EXX (XX = AB or BA): X = Don’t care: Z = HIGH impedance state:
NC = No Change.
FUNCTIONAL DESCRIPTION
The MC74F544 contains two sets of eight D-type latches,
with separate input and controls for each set. For data flow
from A to B, for example, the A-to-B Enable (EAB) input must
be LOW in order to enter data from A0 – A7 or take data from
B0 – B7, as indicated in the Function Table. With EAB LOW,
a LOW signal on the A-to-B latch enable (LEAB) input makes
the A-to-B latches transparent; a subsequent LOW-to-HIGH
transition of the LEAB signal puts the A latches in the storage
mode and their outputs no longer change with the A inputs.
With EAB and OEAB both LOW, the 3-State B output buffers
are active and reflect the inverted data present at the output
of the A latches. Control of data flow from B to A is similar, but
using the EBA, LEBA, and OEBA inputs.
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
(Note 1)
VIH
VIL
Input HIGH Voltage
2.0
—
—
V
Guaranteed Input HIGH Voltage
Input LOW Voltage
—
—
0.8
V
Guaranteed Input LOW Voltage
VIK
Input Clamp Diode Voltage
V
VCC = MIN, IIN = – 18 mA
VCC = 4.5 V
IOH = – 3.0 mA
VCC = 4.75 V
VOH
VOL
IIH
Output HIGH Voltage
Output LOW Voltage
—
– 0.73
– 1.2
2.4
—
—
2.7
3.4
—
A0 – A7
74
B0 – B7
74
2.0
—
—
V
A0 – A7
74
—
0.35
0.5
V
B0 – B7
74
—
0.4
0.55
V
Input HIGH Current
V
IOH = – 15 mA
IOL = 24 mA
VCC = 4.5 V
I/O Pins
—
—
1.0
mA
VCC = MIN
IOL = 64 mA
VCC = MAX, VIN = 5.5 V
Control Pins
—
—
100
µA
VCC = MAX, VIN = 7.0 V
Control Pins
—
—
20
µA
I/O Pins
—
—
70
µA
EAB, EBA
—
—
– 1.2
Other Inputs
—
—
– 0.6
IIL
Input LOW Current
IOZH
Off-State Output Current
—
—
IOZL
Off-State Output Current,
Low-Level Voltage Applied
—
IOS
Output Short Circuit Current (Note 2)
ICC
Total Supply Current
An Outputs
Bn Outputs
VCC = MAX, VIN = 2.7 V
mA
VCC = MAX, VIN = 0.5 V
70
µA
VCC = MAX, VOUT = 2.7 V
—
– 600
µA
VCC = MAX, VOUT = 0.5 V
mA
VCC = MAX, VOUT = 0 V
mA
VCC = MAX
– 60
—
–150
– 100
—
–225
ICCH
ICCL
—
70
105
—
95
130
ICCZ
—
95
125
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, nor for more than 1 second.
FAST AND LS TTL DATA
4-217
MC74F544
AC ELECTRICAL CHARACTERISTICS
Symbol
Parameter
74F
74F
TA = + 25°C
VCC = + 5.0 V
CL = 50 pF
TA = 0 °C to + 70°C
VCC = + 5.0 V ± 10%
CL = 50 pF
Min
Typ
Max
Min
Max
Unit
tPLH
tPHL
Propagation Delay
Transparent Mode
An to Bn or Bn to An
2.0
2.0
—
—
9.5
6.5
2.0
2.0
10.5
7.5
ns
tPLH
tPHL
Propagation Delay
LEBA to An
6.0
4.0
—
—
13
9.5
6.0
4.0
14.5
10.5
ns
tPLH
tPHL
Propagation Delay
LEAB to Bn
6.0
4.0
—
—
13
9.5
6.0
4.0
14.5
10.5
ns
tPZH
tPZL
Output Enable Time
OEBA or OEAB to An or Bn
EBA or EAB to An or Bn
3.0
4.0
—
—
9.0
10.5
3.0
4.0
10
12
ns
tPHZ
tPLZ
Output Disable Time
OEBA or OEAB to An or Bn
EBA or EAB to An or Bn
1.5
1.5
—
—
8.0
7.5
1.5
1.5
9.0
8.5
ns
AC OPERATING REQUIREMENTS
74F
74F
TA = + 25°C
VCC = + 5.0 V
CL = 50 pF
TA = 0°C to + 70°C
VCC = + 5.0 V ± 10%
CL = 50 pF
Min
Typ
Max
Min
Typ
Max
Unit
ts(H)
ts(L)
Setup Time, HIGH or LOW
An or Bn to LEBA or LEAB
3.0
3.0
—
—
—
—
3.0
3.0
—
—
—
—
ns
th(H)
th(L)
Hold Time, HIGH or LOW
An to Bn to LEBA or LEAB
3.0
3.0
—
—
—
—
3.0
3.0
—
—
—
—
ns
tw(L)
Latch Enable, B to A
Pulse Width, LOW
6.0
—
—
7.5
—
—
ns
Symbol
Parameter
FAST AND LS TTL DATA
4-218
MC74F544
LOGIC DIAGRAM
DETAIL A
D Q
LE
B0
D
A0
Q LE
B1
B2
A1
A2
A3
A4
A5
DETAIL A X 7
B3
B4
B5
A6
B6
A7
B7
OEBA
OEAB
EBA
EAB
LEBA
LEAB
NOTE:
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
FAST AND LS TTL DATA
4-219