MICREL SY10H842L, SY100H842L Datasheet
3.3V SINGLE SUPPLY
QUAD PECL-TO-TTL
OUTPUT ENABLE
ClockWorks™
PRELIMINARY
SY10H842L
SY100H842L
FEATURES
■ 3.3V power supply
■ Translates positive ECL-to-TTL (PECL-to-TTL)
■ 300ps pin-to-pin skew
■ 500ps part-to-part skew
■ Differential internal design for increased noise
immunity and stable threshold inputs
■ VBB reference output
■ Single supply
■ Enable input
■ Extra TTL and ECL power/ground pins to reduce
cross-talk/noise
■ High drive capability: 24mA each output
■ Fully compatible with industry standard 10K, 100K
I/O levels
■ Available in 16-pin SOIC package
BLOCK DIAGRAM
DESCRIPTION
The SY10/100H842L are single supply, low skew
translating 1:4 clock drivers.
The devices feature a 24mA TTL output stage, with
AC performance specified into a 20pF load capacitance.
A HIGH on the enable pin (EN) forces all outputs LOW.
As frequencies increase to 40MHz and above, precise
timing and shaping of clock signals becomes extremely
important. The H842 solves several clock distribution
problems such as minimizing skew 300ps), maximizing
clock fanout (24mA drive), and precise duty cycle control
through a proprietary differential internal design.
The 10K version is compatible with 10KH ECL logic
levels. The 100K version is compatible with 100K levels.
PIN CONFIGURATION
V
D
D
BB
EN
ECL Input
TTL Outputs
116
G
T
2
EN
Q
0
Q
1
V
Q
2
314
E
G
4
E
V
D
D
BB
T
G
SOIC
Z16-1
512
6
710
8
15
13
11
Q
3
T
G
Q
2
V
T
T
V
1
Q
G
T
9
Q
0
PIN NAMES
Q
3
Pin Function
GT TTL Ground (0V)
VT TTL VCC (+3.3V)
VE ECL VCC (+3.3V)
GE ECL Ground (0V)
D, D Signal Input (PECL)
VBB VBB Reference Output (PECL)
Q0 - Q3 Signal Outputs (TTL)
EN Enable Input (PECL)
Rev.: C Amendment: /1
1
Issue Date: August, 1999
Micrel
ClockWorks™
PRELIMINARY
SY10H842L
SY100H842L
TRUTH TABLE
DEN Q
LL L
HL H
XH L
ABSOLUTE MAXIMUM RATINGS
Symbol Rating Value Unit
V
E (ECL) Power Supply –0.5 to +7.0 V
VT (TTL) Voltage –0.5 to +7.0
V
I (ECL) Input Voltage 0.0 to VEE V
VOUT (TTL) 0.0 to VT
Tstore Storage Temperature –65 to +150 ˚C
T
A Operating Temperature 0 to +85 ˚C
NOTE:
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.
(1)
PIN DESCRIPTION
Pin Symbol Description
1GT TTL Ground (0V)
2 EN Enable Input (PECL)
3GE ECL Ground (0V)
4VE ECL VCC (+3.3V)
5 D ECL Signal Input (Non-inverting)
6 D ECL Signal Input (Inverting)
7VBB VBB Reference Output (PECL)
8GT TTL Ground (0V)
9Q0 Signal Output (TTL)
10 GT TTL Ground (0V)
11 Q1 Signal Output (TTL)
12 VT TTL VCC (+3.3V)
13 VT TTL VCC (+3.3V)
14 Q2 Signal Output (TTL)
15 GT TTL Ground (0V)
16 Q
3 Signal Output (TTL)
DC CHARACTERISTICS
VT = VE = +3.0V to +3.6V
TA = 0°CTA = +25°CTA = +85°C
Symbol Parameter Min. Max. Min. Max. Min. Max. Unit Condition
IEE Power Supply Current ECL — 35 — 35 — 35 mA VE Pin
CCH Power Supply Current TTL — 20 — 20 — 20 mA Total all VT pins
I
CCL —25 — 25— 25
I
TTL DC ELECTRICAL CHARACTERISTICS
VT = VE = +3.0V to +3.6V
TA = 0°CTA = +25°CTA = +85°C
Symbol Parameter Min. Max. Min. Max. Min. Max. Unit Condition
VOH Output HIGH Voltage 2.0 — 2.0 — 2.0 — V IOH = –3.0mA
VOL Output LOW Voltage — 0.5 — 0.5 — 0.5 V IOL = 24mA
I
OS Output Short Circuit Current –80 — –80 — –80 — mA VOUT = 0V
2
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