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3D7501D PDF даташит
Спецификация 3D7501D изготовлена «ETC» и имеет функцию, называемую «MONOLITHIC MANCHESTER ENCODER». |
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Детали детали
Номер произв | 3D7501D |
Описание | MONOLITHIC MANCHESTER ENCODER |
Производители | ETC |
логотип | ![]() |
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MONOLITHIC MANCHESTER
ENCODER
(SERIES 3D7501)
3D7501
data
delay
3
®
devices, inc.
FEATURES
• All-silicon, low-power CMOS
technology
• TTL/CMOS compatible inputs and
outputs
• Vapor phase, IR and wave
solderable
• Auto-insertable (DIP pkg.)
• Low ground bounce noise
• Maximum data rate: 50 MBaud
PACKAGES
CLK
RESB
DAT
GND
1
2
3
4
8 VDD
7 N/C
6 TXB
5 TX
3D7501M DIP (.300)
3D7501H Gull Wing (.300)
3D7501Z SOIC (.150)
CLK 1 14 VDD
N/C 2 13 N/C
N/C 3 12 N/C
RESB 4 11 N/C
DAT 5 10 N/C
N/C 6 9 TXB
GND 7 8 TX
3D7501 DIP (.300)
3D7501G Gull Wing (.300)
3D7501D SOIC (.150)
FUNCTIONAL DESCRIPTION
PIN DESCRIPTIONS
The 3D7501 is a monolithic CMOS Manchester Encoder. The clock
and data, present at the unit input, are combined into a single bi-
phase-level signal. In this encoding mode, a logic one is represented
by a high-to-low transition within the bit cell, while a logic zero is
represented by a low-to-high transition. The unit operating baud rate (in
Mbaud) is equal to the input clock frequency (in MHZ) . All pins
marked N/C must be left unconnected.
DAT Data Input
CLK Clock Input
RESB Reset
TX Signal Output
TXB Inverted Signal Output
VCC +5 Volts
GND Ground
The all-CMOS 3D7501 integrated circuit has been designed as a reliable, economic alternative to hybrid
TTL Manchester Encoder. It is TTL- and CMOS-compatible, capable of driving ten 74LS-type loads. It is
offered in standard 8-pin and 14-pin auto-insertable DIPs and space saving surface mount 8-pin and 14-
pin SOICs.
Doc #96010
5/19/97
DATA DELAY DEVICES, INC.
3 Mt. Prospect Ave. Clifton, NJ 07013
1
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3D7501
APPLICATION NOTES
The 3D7501 Manchester Encoder samples the
data input at the rising edge of the input clock.
The sampled data is used in conjunction with the
clock rising and falling edges to generate the by-
phase level Manchester code.
INPUT SIGNAL CHARACTERISTICS
The 3D7501 Manchester Encoder inputs are
TTL compatible. The user should assure
himself that the 1.5 volt TTL threshold is used
when referring to all timing, especially to the
input clock duty cycle.
CLOCK DUTY CYCLE ERRORS
The 3D7501 Manchester Encoder employs the
timing of the clock rising and falling edges (duty
cycle) to implement the required coding scheme.
To reduce the difference between the output data
high time and low time, it is essential that the
deviation of the input clock duty cycle from 50/50
be minimized.
OUTPUT SIGNAL CHARACTERISTICS
The 3D7501 presents at its outputs the true and
the complimented encoded data.
The High-to-Low time skew of the selected data
output should be budgeted by the user, as it
relates to his application, to satisfactorily
estimate the distortion of the transmitted data
stream.
Such estimate is very useful in determining the
functionality and margins of the data link, if a
3D7502 Manchester Decoder is used to decode
the received data.
POWER SUPPLY AND
TEMPERATURE CONSIDERATIONS
CMOS integrated circuitry is strongly dependent
on power supply and temperature. The
monolithic 3D7501 Manchester encoder utilizes
novel and innovative compensation circuitry to
minimize timing variations induced by
fluctuations in power supply and/or temperature.
RESET
(RESB)
CLOCK
(CIN)
DATA
(DIN)
tDS
TRANSMIT
(TXB)
TRANSMIT
(TX)
1/fC
1
0
Power-on reset (Left high for normal operation)
11001
0
tDH
T2H T2L
T1H T1L
1011001
Figure 1: Timing Diagram
0
Doc #96010
DATA DELAY DEVICES, INC.
5/19/97
Tel: 973-773-2299 Fax: 973-773-9672 http://www.datadelay.com
2
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3D7501
DEVICE SPECIFICATIONS
TABLE 1: ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL MIN
MAX UNITS NOTES
DC Supply Voltage
Input Pin Voltage
Input Pin Current
Storage Temperature
VDD
VIN
IIN
TSTRG
-0.3 7.0
V
-0.3 VDD+0.3 V
-10 10 mA
-55 150 C
25C
Lead Temperature
TLEAD
300 C 10 sec
TABLE 2: DC ELECTRICAL CHARACTERISTICS
(0C to 70C, 4.75V to 5.25V)
PARAMETER
Static Supply Current*
High Level Input Voltage
Low Level Input Voltage
High Level Input Current
Low Level Input Current
High Level Output Current
SYMBOL
IDD
VIH
VIL
IIH
IIL
IOH
Low Level Output Current
IOL
Output Rise & Fall Time
TR & TF
*IDD(Dynamic) = 2 * CLD * VDD * F
where: CLD = Average capacitance load/pin (pf)
F = Input frequency (GHz)
MIN
2.0
-4.0
4.0
MAX
40
0.8
1.0
1.0
2
UNITS
mA
V
V
µA
µA
mA
mA
ns
NOTES
VIH = VDD
VIL = 0V
VDD = 4.75V
VOH = 2.4V
VDD = 4.75V
VOL = 0.4V
CLD = 5 pf
Input Capacitance = 10 pf typical
Output Load Capacitance (CLD) = 25 pf max
TABLE 3: AC ELECTRICAL CHARACTERISTICS
(-40C to 85C, 4.75V to 5.25V)
PARAMETER
Input Baud Rate
Clock Frequency
Data set-up to clock rising
Data hold from clock rising
TX High-Low time skew
TXB High-Low time skew
TX - TXB High/Low time skew
SYMBOL
fBN
fC
tDS
tDH
t1H - t1L
t2H - t2L
t1H - t2L
MIN
3.5
0
-3.5
-2.0
-3.0
TYP
MAX
50
50
3.5
2.0
3.0
UNITS
MBaud
MHz
ns
ns
ns
ns
ns
Notes: 1: Assumes a 50% duty cycle clock input
NOTES
1
1
1
Doc #96010
5/19/97
DATA DELAY DEVICES, INC.
3 Mt. Prospect Ave. Clifton, NJ 07013
3
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Номер в каталоге | Описание | Производители |
3D7501 | MONOLITHIC MANCHESTER ENCODER | ![]() ETC |
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3D7501H | MONOLITHIC MANCHESTER ENCODER | ![]() ETC |
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