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查询SY100EL15供应商
FEATURES
■ 50ps output-to-output skew
■ Synchronous enable/disable
■ Multiplexed clock input
■ 75KΩ internal input pull-down resistors
■ Available in 16-pin SOIC package
PIN CONFIGURATION/BLOCK DIAGRAM
EN
CC
V
16 15 14 13 12 11 10 9
D
Q
2
1
0Q0
Q
CLK
SCLK
1 0
34567
Q
Q
1
1
SOIC
TOP VIEW
CLK
Q
BB
V
2
Q
2
SEL
Q
V
EE
8
3
3
Q
1:4 CLOCK
DISTRIBUTION
DESCRIPTION
The SY10/100EL15 are low skew 1:4 clock distribution
chips designed explicitly for low skew clock distribution
applications. The device can be driven by either a
differential or single-ended ECL or, if positive power
supplies are used, PECL input signal. If a single-ended
input is to be used the VBB output should be connected
to the CLK input and bypassed to VCC via a 0.01µF
capacitor. The VBB output is designed to act as the
switching reference for the input of the EL15 under singleended input conditions, as a result this pin can only
source/sink up to 0.5mA of current.
The EL15 features a multiplexed clock input to allow
for the distribution of a lower speed scan or test clock
along with the high speed system clock. When LOW (or
left open and pulled LOW by the input pull-down resistor)
the SEL pin will select the differential clock input.
The common enable (EN) is synchronous so that the
outputs will only be enabled/disabled when they are
already in the LOW state. This avoids any chance of
generating a runt clock pulse when the device is enabled/
disabled as can happen with an asynchronous control.
The internal flip flop is clocked on the falling edge of the
input clock, therefore all associated specification limits
are referenced to the negative edge of the clock input.
Precision Edge™
SY10EL15
SY100EL15
FINAL
Precision Edge™
Pin Function
CLK Differential Clock Inputs
SCLK Synchronous Clock Input
EN Synchronous Enable
SEL Clock Select Input
VBB Reference Output
Q0-3 Differential Clock Outputs
Precision Edge is a trademark of Micrel, Inc.
TRUTH TABLEPIN NAMES
CLK SCLK SEL EN Q
L XLLL
HXLLH
XLHLL
XHHLH
XXXHL*
* On next negative transition of CLK or SCLK
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Rev.: G Amendment: /0
Issue Date:
February 2003
Page 2
Micrel
Precision Edge™
SY10EL15
SY100EL15
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol Rating Value Unit
VEE Power Supply (VCC = 0V) –8.0 to 0 VDC
VI Input Voltage (VCC = 0V) 0 to –6.0 VDC
OUT Output Current
I
–Continuous 50 mA
–Surge 100
TA Operating Temperature Range –40 to +85 °C
V
EE Operating Range
NOTES:
1. Absolute maximum rating, beyond which, device life may be impaired, unless otherwise specified on an individual data sheet.
2. Parametric values specified at: 100EL15 Series: –4.2V to –5.5V.
(1),(2)
10EL15 Series –4.75V to –5.5V.
–5.7 to –4.2 V
10EL DC ELECTRICAL CHARACTERISTICS
VEE = VEE (Min.) to VEE (Max.); VCC = GND
Symbol Parameter Min. Max. Min. Max. Min. Typ. Max. Min. Max. Unit
VOH Output HIGH Voltage –1080 –890 –1020 –840 –980 — –810 –910 –720 mV
VOL Output LOW Voltage –1950 –1650 –1950 –1630 –1950 — –1630 –1950 –1595 mV
VIH Input HIGH Voltage –1230 –890 –1170 –840 –1130 — –810 –1060 –720 mV
VIL Input LOW Voltage –1950 –1500 –1950 –1480 –1950 — –1480 –1950 –1445 mV
IIH Input High Current — 150 — 150 — — 150 — 150 µA
IIL Input LOW Current 0.5 — 0.5 — 0.5 — — 0.5 — µA
IEE Power Supply Current — 35 — 35 — 25 35 — 38 mA
BB Output Reference Voltage –1.38 –1.26 –1.38 –1.26 –1.38 — –1.26 –1.38 –1.26 V
V
NOTE:
1. 10EL circuits are designed to meet the DC specifications shown in the table after thermal equilibrium has been established. The circuit is in a test socket
or mounted on a printed circuit board and transverse airflow greater than 500lfpm is maintained. Outputs are terminated through a 50Ω resistor to –2.0V
except where otherwise specified on the individual data sheets.
(1)
TA = –40°CTA = 0°CTA = +25°CTA = +85°C
PRODUCT ORDERING CODE
Ordering Package Operating Marking
Code Type Range Code
SY10EL15ZC Z16-2 Commercial HEL15
SY10EL15ZCTR* Z16-2 Commercial HEL15
SY100EL15ZC Z16-2 Commercial XEL15
SY100EL15ZCTR* Z16-2 Commercial XEL15
*Tape and Reel
Note 1. Recommended for new designs.
Ordering Package Operating Marking
Code Type Range Code
SY10EL15ZI
SY10EL15ZITR*
SY100EL15ZI
SY100EL15ZITR*
*Tape and Reel
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(1)
(1)
(1)
Z16-2 Industrial HEL15
Z16-2 Industrial HEL15
Z16-2 Industrial XEL15
(1)
Z16-2 Industrial XEL15
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Precision Edge™
SY10EL15
Micrel
SY100EL15
100EL DC ELECTRICAL CHARACTERISTICS
VEE = VEE (Min.) to VEE (Max.); VCC = GND
Symbol Parameter Min. Max. Min. Max. Min. Typ. Max. Min. Max. Unit
(4)
(2)
(3)
(2)
–1085 –880 –1025 –880 –1025 –955 –880 –1025 –880 mV
–1830 –1555 –1810 –1620 –1810 –1705 –1620 –1810 –1620 mV
(3)
–1095 — –1035 — –1035 — — –1035 — mV
VOH Output HIGH Voltage
VOL Output LOW Voltage
VOHA Output HIGH Voltage
VOLA Output LOW Voltage
VIH Input HIGH Voltage –1165 –880 –1165 –880 –1165 — –880 –1165 –880 mV
VIL Input LOW Voltage –1810 –1475 –1810 –1475 –1810 — –1475 –1810 –1475 mV
IIH Input High Current — 150 — 150 — — 150 — 150 µA
IIL Input LOW Current
IEE Power Supply Current — 35 — 35 — 25 35 — 38 mA
BB Output Reference Voltage –1.38 –1.26 –1.38 –1.26 –1.38 — –1.26 –1.38 –1.26 V
V
NOTES:
1. This table replaces the three traditionally seen in ECL 100K data books. The same DC parameter values at VEE = –4.5V now apply across the full VEE
range of –4.2V to –5.5V. Outputs are terminated through a 50Ω resistor to –2.0V except where otherwise specified on the individual data sheets.
2. VIN = VIH(Max) or VIL(Min).
3. VIN = VIH(Min) or VIL(Max).
4. VIN = VIL(Max).
(1)
A = –40°CTA = 0°CTA = +25°CTA = +85°C
T
— –1555 — –1610 — — –1610 — –1610 mV
0.5 — 0.5 — 0.5 — — 0.5 — µA
AC ELECTRICAL CHARACTERISTICS
VEE = VEE (Min) to VEE (Max); VCC = GND
TA = –40°CTA = 0°CTA = +25°CTA = +85°C
Symbol Parameter Min. Max. Min. Max. Min. Typ. Max. Min. Max. Unit
t
PLH Propagation Delay ps
tPHL CLK to Q (Diff) 460 660 470 670 470 — 670 500 700
CLK to Q (SE) 410 710 420 720 420 — 720 450 750
SCLK to Q 410 710 420 720 420 — 720 470 750
t
skew Part-to-Part Skew
Within-Device Skew — 50 — 50 — — 50 — 50
tS Setup Time EN 150 — 150 — 150 — — 150 — ps
tH Hold Time EN 400 — 400 — 400 — — 400 — ps
PP Minimum Input CLK 250 — 250 — 250 — — 250 — mV
V
Swing
CMR Common Mode CLK –2.0 –0.4 –2.0 –0.4 –2.0 — –0.4 –2.0 –0.4 V
V
Range
r Output Rise/Fall Times Q — — 325 575 325 — 575 325 575 ps
t
tf (20% – 80%)
NOTE:
1. Skews are specified for identical LOW-to-HIGH or HIGH-to-LOW
transitions.
(1)
— 200 — 200 — — 200 — 200 ps
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Micrel
16 LEAD SOIC .150" WIDE (Z16-2)
Precision Edge™
SY10EL15
SY100EL15
Rev. 02
MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA
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.
TEL + 1 (408) 944-0800 FAX + 1 (408) 944-0970 WEB http://www.micrel.com
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.
© 2003 Micrel, Incorporated.
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