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PDF CY7B8392 Data sheet ( Hoja de datos )
| Número de pieza | CY7B8392 | |
| Descripción | Ethernet Coax Transceiver Interface | |
| Fabricantes | Cypress | |
| Logotipo |  |
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CY7B8392
Ethernet Coax Transceiver Interface
1CY7B 8392
Features
• Compliant with IEEE802.3 10BASE5 and 10BASE2
• Pin compatible with the popular 8392
• Internal squelch circuit to eliminate input noise
• Hybrid mode collision detect for extended distance
• Automatic AUI port isolation when coaxial connector is
not present
• Low power BiCMOS design
• 16-Pin DIP or 28-Pin PLCC
Functional Description
The CY7B8392 is a low power coaxial transceiver for Ethernet
10BASE5 and 10BASE2 applications. The device contains all
the circuits required to perform transmit, receive, collision de-
tection, heartbeat generation, jabber timer and attachment
unit interface (AUI) functions. In addition, the CY7B8392 fea-
tures an advanced hybrid collision detection.
The transmitter output is connected directly to a double termi-
nated 50Ω cable.
The CY7B8392 is fabricated with an advanced low power
BiCMOS process. Typical standby current during idle is 25 mA.
Logic Block Diagram
RXI
GND
RCV
CDS
TXO
RR+
1K
RR–
HIGH PASS
EQUALIZATION
LOW PASS
FILTER
LOW PASS
FILTER
CCM
–
+
AUI
DRIVER
CARRIER
SENSE
AUI
DRIVER
LOW PASS
FILTER
– COLLISION
+
WAVEFORM
SHAPING
+
–
DC/AC
SQUELCH
VEE
REFERENCE
CIRCUIT
10 MHz CLK
OSC
WATCH DOG
TIMER 26 ms
TRANSMIT
STATE
MACHINE
JABBER RESET
TIMER 0.4 sec
RECEIVE
STATE
MACHINE
RX+
RX–
CD+
CD–
TX+
TX–
Pin Configurations
DIP
Top View
CD+
CD–
RX+
VEE
VEE
RX–
TX+
TX–
1 16
2 15
3 14
4 13
5 7B8392 12
6 11
7 10
89
CDS
TXO
RXI
VEE
RR–
RR+
GND
HBE
8392–3
HBE
PLCC
Top View
VEE (NC)
VEE (NC)
VEE
VEE
VEE (NC)
VEE (NC)
VEE (NC)
4 3 2 1 28 2726
5 25
6 24
7
7B8392
23
8 22
9 21
10 20
11 1213 14 15 16 1718
VEE (NC)
VEE
VEE (NC)
VEE (NC)
VEE
VEE (NC)
RR–
8392–2
8392–1
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
Document #: 38-02016 Rev. **
Revised January 1996
Free Datasheet http://www.datasheet4u.com/
1 page  
CY7B8392
AC Test Loads and Waveforms
TXO
TRANSMITTER
OUTPUT
25Ω
(a)
RECEIVER (RX)
COLLISION OUTPUT (CD)
510Ω
39Ω
50 µH
39Ω
510Ω
VEE
(b) 8392–5
Switching Characteristics Over the Operating Range
Parameter
Description
tRON
Receiver Start-Up Delay
tRONV
First Validly Timed Bit On RX±
tRD Receiver Propagation Delay
tRR Differential Output Rise Time (RX±, CD±)
tRF Differential Output Fall Time (RX±, CD±)
tOS Differential Output Settling Time (VOB = ± 40mV)
tRJ Receiver and Cable Total Jitter
tTST Transmitter Start-Up Delay
tTSTV
First Validly Timed Bit On TXO
tTD Transmitter Propagation Delay
tTR Transmitter Output Rise Time (TXO)
tTF Transmitter Fall Time (TXO)
tTM tTR and tTF Mismatch
tTS
tTON
Transmit Skew (TXO)
Transmit Turn-On Pulse Width at VTS (TX±)[12]
tTOFF
Transmit Turn-Off Delay
tCON
Collision Turn-On Delay
tCOFF
Collision Turn-Off Delay
fCD Collision Frequency
tCD Collision Pulse Width
tHON
CD Heartbeat Delay
tHW CD Heartbeat Duration
tJA Jabber Activation Delay
tJR Jabber Reset Time Out
Notes:
12. For a minimum pulse amplitude of >300 mV.
Min.
20
20
10
130
8.5
40
0.6
0.5
20
300
Typ.
2.5
25
4
4
1
±2
1
25
25
25
±0.5
±0.5
20
200
7
10
50
1.1
1.0
26
420
Max.
5
tRON+1
50
7
7
2
tTST+1
50
30
30
±3
±2
40
300
13
20
12.5
60
1.6
1.5
32
550
Unit
bits
bits
ns
ns
ns
µs
ns
bits
bits
ns
ns
ns
ns
ns
ns
ns
bits
bits
MHz
ns
µs
µs
ms
ms
Document #: 38-02016 Rev. **
Page 5 of 8
Free Datasheet http://www.datasheet4u.com/
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet CY7B8392.PDF ] | |
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