MICREL SY100HA643 Datasheet
DUAL SUPPLY
OCTAL ECL-TO-TTL
ClockWorks™
SY100HA643
FEATURES
■ ECL/TTL version of popular ECLinPS™ E111
■ 400ps within device skew
■ 800ps part-to-part skew
■ Latch
■ Differential internal design
■ V
BB output
■ Dual supply
■ Reset/Enable
■ Multiple TTL and ECL power/ground pins
■ Fully compatible with Motorola MC100H643
■ Higher performance than H643 versions
■ Industrial temperature availability
■ Available in 28-pin PLCC package
BLOCK DIAGRAM
Q
Q
Q
DESCRIPTION
The SY100HA643 is an enhanced dual supply, low skew
translating 1:8 clock driver. Devices in the Micrel-Synergy
H600 translators series utilize the 28-lead PLCC for optimal
power pinning, signal flow through and electrical
performance. The dual-supply HA643 is similar to the H641,
which is a single-supply 1:9 version of the same function,
with higher performance than the H643 versions.
The device features a 48mA TTL output stage, with AC
performance specified into a 20pF load capacitance. A
Latch is provided on-chip. When LEN is LOW (or left open,
in which case it is pulled LOW by the internal pulldowns)
the latch is transparent. A HIGH on the enable pin (EN)
forces all outputs LOW.
The 100HA643 is compatible with 100K ECL logic levels.
PIN CONFIGURATION
3
5
Q
Q4OGND
0
Q
3
OGND
2
Q
1
2
OVT
OGND
2
1
Q
1
1
Q
0
25 24 23 22 21 20 19
26
27
28
SY100HA643
1
2
3
4
TOP VIEW
PLCC
567891011
2
OVT
6
Q
4
7
OGND
Q
18
IVT
2
17
IGND
2
16
V
CCE
15
V
CCE
14
LEN
13
12
BB
V
D
1
1
EE
VEEV
Q
3
D
D
V
BB
LEN
EN
D
TTL OUTPUTS
PIN NAMES
Q
Pin Function
Q
4
OGND TTL Output Ground (0V)
IVT
V
1GND
EE
EN
D
OVTTTL Output VCC (+5.0V)
IGND Internal TTL GND (0V)
Q
5
IVT Internal TTL VCC (+5.0V)
VEE ECL VEE (-5.2/-4.5V)
Q
6
VCCE ECL Ground (0V)
D, D Signal Input (ECL)
VBB VBB Reference Output
Q
7
Q0 - Q7 Signal Outputs (TTL)
EN Enable Input (ECL)
LEN Latch Enable Input (ECL)
Rev.: G Amendment: /1
1
Issue Date: August, 1998
ClockWorks™
Micrel
SY100HA643
TRUTH TABLE
D LEN EN Q
LLLL
HLLH
XXHL
DC CHARACTERISTICS
IVT = OVT = 5.0V ±5%; VEE = –4.2V to –5.5V; VCCE = GND
A = –40°CTA = 0°CTA = +25°CTA = +85°C
T
Symbol Parameter Min. Max. Min. Max. Min. Max. Min. Max. Unit Condition
EE ECL — 58 — 58 — 58 — 58 mA VEE Pins
I
ICCL Power Supply TTL — 83 — 83 — 83 — 83 mA Total all OVT
ICCH — 73 — 73 — 73 — 73 mA and IVT pins
OH TTL Output HIGH 2.5 — 2.5 — 2.5 — 2.5 — V IOH = –3.0mA
V
Voltage 2.0 — 2.0 — 2.0 — 2.0 — IOH = –15mA
VOL TTL Output LOW Voltage — 0.5 — 0.5 — 0.5 — 0.5 V IOL = 48mA
OS TTL Output Short Circuit
I
Current –80 –200 –80 –200 –80 –200 –80 –200 mA VOUT = 0V
IIH ECL Input HIGH Current — 225 — 225 — 175 — 175 µA
IIL ECL Input LOW Current 0.5 — 0.5 — 0.5 — 0.5 — µA
VIH ECL Input HIGH Voltage — — –1165 –880 –1165 –880 –1165 –880 mV
VIL ECL Input LOW Voltage — — –1810 –1475 –1810 –1475 –1810 –1475 mV
BB ECL Output Reference
V
Voltage –1380 –1260 –1380 –1260 –1380 –1260 –1380 –1260 mV
2
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