The SY10EL1189 is a differential receiver, differential
transmitter specifically designed to drive coaxial cables.
It incorporates the output cable driver capability of the
SY10EL89 Coaxial Cable Driver with additional circuitry
to multiplex the output cable drive source between the
cable receiver or the local transmitter inputs. The
multiplexer control circuitry is TTL compatible for ease of
operation.
The SY10EL1189 is useful as a bypass element for
Fibre Channel-Arbitrated Loop (FC-AL) or Serial Storage
Architecture (SSA) applications, to create loop style
interconnects with fault tolerant, active switches at each
device node. This device is particularly useful for back
panel applications where small size is desirable.
The EL89 style drive circuitry produces swings twice
as large as a standard PECL output. When driving a
coaxial cable, proper termination is required at both ends
of the line to minimize reflections. The 1.6V output swings
allow for proper termination at both ends of the cable.
Because of the larger output swings, the QT, QT outputs
are terminated into the thevenin equivalent of 50Ω to
V
CC
-3.0V instead of 50Ω to V
CC
-2.0V.
LOGIC DIAGRAM
From Input Cable
(ECL Levels)
Local
Receive Data
(ECL Levels)
QR
QR
DR
DR
V
BB
1
Local
Transmit Data
(ECL Levels)
DT
DT
0
QT
To Output Cable
(Enhanced Swing)
SEL (TTL)
QT
PIN NAMES
Pin
DR/DR
Function
Differential Input from Receive Cable
Buffered Differential Output from Receive Cable
Differential Input to Transmit Cable
Buffered Differential Output to Transmit Cable
Multiplexer Control Signal (TTL)
Postive Power Supply
Ground
Reference Voltage Output
PIN CONFIGURATION
QR/QR
DT/DT
QT/QT
QR
QR
V
CC
NC
V
CC
QT
QT
V
CC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
DR
DR
GND
V
BB
DT
DT
SEL
SEL
V
CC
GND
V
BB
Top View
SOIC
TRUTH TABLE
SEL
L
H
DR
➝
QT
DT
➝
QT
Function
Rev.: D
Amendment: 0
1
Issue Date: February 2003
Micrel
SY10EL1189
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
V
CC
V
IN
I
OUT
T
A
T
store
V
CC
Rating
Power Supply Voltage (Referenced to GND)
Input Voltage (Referenced to GND)
Output Current
— Continuous
— Surge
Value
0 to +7.0
0 to V
CC
50
100
–40 to +85
–50 to +150
4.5 to 5.5
Unit
V
V
mA
°C
°C
V
Operating Temperature Range
Storage Temperature Range
Operating Voltage Range
(2)
NOTES:
1. Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are exceeded. This is a stress rating only and functional operation is not implied
at conditions other than those detailed in the operational sections of this data sheet. Exposure to ABSOLUTE MAXIMUM RATlNG conditions for extended
periods may affect device reliability.
2. Parametric values specified at 4.75 to 5.25V.
DC ELECTRICAL CHARACTERISTICS
(1)
V
CC
= 5.0V, GND = 0V
T
A
= –40
°
C
Symbol
V
OL
V
OH
V
OL
V
OH
I
CC
V
IL
V
IH
I
IL
I
IH
V
IL
V
IH
I
IL
I
IH
Parameter
Output LOW Voltage
(2,3)
T
A
= 0
°
C
Min.
3.05
3.98
T
A
= +25
°
C
Max.
3.37
4.16
T
A
= +85
°
C
Min.
3.05
4.09
Min. Typ.
3.05
3.92
3.23
4.05
Max.
3.35
4.11
Typ.
3.24
4.09
Min.
3.05
4.02
Typ.
3.24
4.11
Max.
3.37
4.19
Typ.
3.25
4.16
Max. Unit
3.41
4.28
V
V
(QR, QR)
Output HIGH Voltage
(2,3)
(QR, QR)
Output LOW Voltage
(2,4)
(QT, QT)
Output HIGH Voltage
(2,4)
(QT, QT)
Quiescent Supply
Current
(5)
Input LOW Voltage
(2)
(DR,DR & DT,DT)
Input HIGH Voltage
(2)
(DR,DR & DT,DT)
Input LOW Current
(DR,DR & DT,DT)
Input HIGH Current
(DR,DR & DT,DT)
Input LOW Voltage SEL
Input HIGH Voltage SEL
Input LOW Current SEL
V
IN
= 500mV
Input HIGH Current SEL
V
IN
= 2.7V
V
IN
= V
CC
Output Reference
Voltage
(2)
1.94
3.71
20
3.05
3.77
—
0.5
—
2.0
—
—
—
3.57
2.22
3.89
25
—
—
—
—
—
—
—
—
—
3.63
2.50
4.08
42
3.50
4.11
150
—
0.8
—
600
20
100
3.70
1.83
3.79
22
3.05
3.83
—
0.5
—
2.0
—
—
—
3.62
2.12
3.98
26
—
—
—
—
—
—
—
—
—
3.67
2.
3.
4.
5.
2.41
4.17
47
3.52
4.16
150
—
0.8
—
600
20
100
3.73
1.80
3.83
23
3.05
3.87
—
0.5
—
2.0
—
—
—
3.65
2.10
4.02
27
—
—
—
—
—
—
—
—
—
3.70
2.39
4.20
47
3.52
4.19
150
—
0.8
—
600
20
100
3.75
1.77
3.90
25
3.05
3.94
—
0.5
—
2.0
—
—
—
3.69
2.06
4.09
28
—
—
—
—
—
—
—
—
—
3.75
2.35
4.28
47
3.56
4.28
150
—
0.8
—
600
20
100
3.81
V
V
mA
V
V
µA
µA
V
V
µA
µA
V
V
BB
NOTES:
1. 10EL circuits are designed to meet the DC specifications shown in the
table after thermal equilibrium has been established. The circuit is
mounted in a test socket or mounted on a printed circuit board and
transverse air greater than 500lfm is maintained.
Values will track 1:1 with the V
CC
supply.
Outputs loaded with 50Ω to +3.0V.
Outputs loaded with 50Ω to +2.0V.
Outputs open circuited.
2
Micrel
SY10EL1189
AC ELECTRICAL CHARACTERISTICS
(1)
V
CC
= 4.75 to 5.25V
T
A
=–40
°
C
Symbol
t
PLH
t
PHL
Parameter
Propagation Delay
to Output
DR
➝
QR (Diff)
(SE)
DR
➝
QT (Diff)
(SE)
DT
➝
QT (Diff)
(SE)
SEL
➝
QT, QT
QR, QR
QT, QT
Min.
175
150
250
225
225
200
450
100
150
—
200
3.00
Typ.
300
300
425
425
400
400
600
275
300
15
—
—
Max.
450
500
650
700
650
725
850
400
550
—
—
4.35
T
A
= 0
°
C to 85˚C
Min.
225
175
300
250
275
225
500
125
150
—
200
3.00
Typ.
325
325
450
450
425
425
650
275
300
15
—
—
Max.
500
550
650
700
650
725
800
400
550
—
—
4.35
Unit
ps
Condition
Note 2
Note 3
t
PLH
t
PHL
t
r
t
f
t
r
t
f
t
skew
V
PP
V
CMR
Propagation Delay
Rise/Fall Time
(20% to 80%)
Rise/Fall Time
(20% to 80%)
ps
ps
ps
ps
mV
V
1.5V to 50% Pt
Within Device Skew
(4)
Minimum Input Swing
(5)
Common Mode Range
(6)
NOTES:
1. 10EL circuits are designed to meet the DC specifications shown in the table after thermal equilibrium has been established. The circuit is mounted in a
test socket or mounted on a printed circuit board and transverse air greater than 500lfm is maintained.
2. The differential propagation delay is defined as the delay from the crossing points of the differential input signals to the crossing point of the differential
output signals.
3. The single-ended propagation delay is defined as the delay from the 50% point of the input signal to the 50% point of the output signal.
4. Duty cycle skew is the difference between t
PLH
and t
PHL
propagation delay through a device.
5. Minimum input swing for which AC parameters are guaranteed.
6. The CMR range is referenced to the most positive side of the differential input signal. Normal operation is obtained if the HIGH level falls within the specified
range and the peak-to-peak voltage lies between V
PP
Min. and 1.0V.
PRODUCT ORDERING CODE
Ordering
Code
SY10EL1189ZC
SY10EL1189ZCTR*
Package
Type
Z16-2
Z16-2
Operating
Range
Commercial
Commercial
Marking
Code
HEL1189
HEL1189
Ordering
Code
SY10EL1189ZI
(1)
SY10EL1189ZITR*
(1)
Package
Type
Z16-2
Z16-2
Operating
Range
Industrial
Industrial
Marking
Code
HEL1189
HEL1189
*Tape and Reel
Note 1.
Recommended for new designs.
3
Micrel
SY10EL1189
16 LEAD SOIC .150" WIDE (Z16-2)
Rev. 02
MICREL, INC.
TEL
1849 FORTUNE DRIVE SAN JOSE, CA 95131
FAX
USA
+ 1 (408) 944-0800
+ 1 (408) 944-0970
WEB
http://www.micrel.com
The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use.
Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into
the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s
use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify
Micrel for any damages resulting from such use or sale.
filter: process(clk, rst) begin if rst = '0'then st <= s0; fil_outQ(17 downto 0)<= (others =>'0'); elsif RISING_EDGE(clk) then if fil_ready = '1' then fil_cn ......
当今的计算机外部设备，都在追求高速度和高通用性。为了满足用户的需求，以Intel为首的七家公司于1994年推出了USB（Universal Serial Bus，通用串行总线）总线协议，专用于低、中速的计算机外设。目前，USB端口已成为微机主板的标准端口；而在不久的将来，所有的微机外设，包括键盘、鼠标、显示器、打印机、数字相机、扫描仪和游戏柄等等，都将通过USB与主机相连。
...[详细]
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