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SC26C94 датащи(PDF) 28 Page - NXP Semiconductors

номер детали SC26C94
подробное описание детали  Quad universal asynchronous receiver/transmitter QUART
PDF  33 Pages
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производитель  PHILIPS [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

SC26C94 датащи(HTML) 28 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
SC26C94
Quad universal asynchronous receiver/transmitter (QUART)
1995 May 1
28
C1 and C2 should be chosen according to the
crystal manufacturer’s specification.
C1 and C2 values will include any parasitic
capacitance of the wiring.
X1/CLK
CTCLK
RxC
TxC
tCLK
tCTC
tRx
tTx
tCLK
tCTC
tRx
tTx
+5V
1K required for
TTL gate.
X1
X2
C1 = C2 = 24pF FOR CL = 20PF
X1
X2
3.6864MHz
3pF
4pF
50 KOHMs
TO
150 KOHMs
26C94
NOTES:
C1 and C2 should be based on manufacturer’s specification.
X1 and X2 parasitic capacitance IS 1-2pF AND 3-5pF, respectively.
GAIN:
at 4MHz 8 to 14db; at 8MHz 2 to 6db
PHASE: at 4MHz 272
° to 276°; at 8MHz 272° to 276°
TYPICAL CRYSTAL SPECIFICATION
FREQUENCY:
2 – 4MHZ
LOAD CAPACITANCE (CL):
12 – 32pF
TYPE OF OPERATION:
PARALLEL RESONANT, FUNDAMENTAL MODE
NC
C1
C2
MUX
To
remainder
of circuit
÷ 2
38.4kHz CLOCK
BRG
TO I/O CHANGE-OF-STATE DETECTORS
22
STANDARD
BAUD
RATES
SD00172
Figure 10. Clock Timing
TxC
(INPUT)
TxD
TxC
(1X OUTPUT)
1 BIT TIME
(1 OR 16 CLOCKS
tTCS
tTXD
SD00173
Figure 11. Transmit Clock Timing



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