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LOW-POWER HEX
B
ECL-to-TTL
TRANSLATOR
SY100S325
FEATURES
■ Max. propagation delay of 3.7ns
■ I
EE min. of –37mA
■ TTL outputs
■ Extended supply voltage option:
VEE = –4.2V to –5.5V
■ 25% faster than National's 325
■ Differential inputs with built-in offset
■ Voltage and temperature compensation for improved
noise immunity
■ VBB output for single-ended use
■ Internal 75KΩ input pull-down resistors
■ Function and pinout compatible with Fairchild F100K
■ Available in 24-pin CERPACK and 28-pin PLCC
packages
BLOCK DIAGRAM
V
BB
D
0
D
0
D
1
D
1
D
2
D
2
D
3
D
3
D
4
D
4
Q
0
Q
1
Q
2
Q
3
Q
4
DESCRIPTION
The SY100S325 are hex translators for converting
100K ECL logic levels to TTL logic levels. Inputs can be
used as inverting, non-inverting or differential receivers.
An internal reference voltage generator provides VBB for
single-ended operation or for use in Schmitt trigger
applications. All inputs have 75KΩ pull-down resistors.
The outputs will go LOW when the inputs are either open
or have the same potential.
When used in single-ended operation, the apparent
input threshold of the true inputs is 20mV to 40mV higher
(positive) than the threshold of the complementary inputs.
The VTTL and VEE power may be applied in either order.
PIN CONFIGURATIONS
5
EES
V
Q4Q3Q
25
24 23 22 21 20 19
26
V
TTL
27
V
TTL
28
V
CC
1
V
CC
2
V
CC
3
Q
2
4
Q
1
Top View
PLCC
J28-1
567891011
0
0
0
D
D
Q
EES
V
5
5
D
D
1
D
D1D
D
D
D
Q
Q
Q
4
D
18
D
4
17
D
3
16
D
3
15
V
EES
14
V
EE
13
V
BB
12
D
2
4
3
2
4
5
5
5
4
3
3
D
D
D
24 23 22 21 20 19
1
2
3
4
5
6
Top View
Flatpack
F24-1
7891011
CC
TTL
TTL
V
V
V
EE
V
CC
V
2
B
D
V
18
D
2
17
D
1
16
D
1
15
D
0
14
D
0
13
Q
0
12
1
2
Q
Q
D
5
D
5
Q
5
PIN NAMES
Pin Function
D0–D5 Data Inputs
D0–D5 Inverting Data Inputs
Q0–Q5 Data Outputs
VEES VEE Substrate
VTTL TTL VCC Power Supply
CCA VCCO for ECL Outputs
V
Rev.: F Amendment: /0
1
Issue Date: July, 1999
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Micrel
SY100S325
DC ELECTRICAL CHARACTERISTICS
VEE = –4.2V to –4.8V unless otherwise specified, VCC =VCCA = GND, VTTL = +4.5V to +5.5V
Symbol Parameter Min. Typ. Max. Unit Condition
V
OH Output HIGH Voltage 2.5 —— VIOH = –2.0mA VIN = VIH (Max.)
VOL Output LOW Voltage ——0.5 V IOL = 24mA VIN = VIL (Min.)
VDIFF Input Voltage Differential 150 ——mV Required for Full Output Swing
VCM Common Mode Voltage ——1.0 V Permissible ±VCM with Respect to VBB
IIH Input HIGH Current ——350 µAVIN = VIH (Max.), D0–D5 = VBB, D0–D5 = VIL (Min.)
IIL Input LOW Current 0.5 —— µAVIN = VIH (Min.), D0–D5 = VBB
IOS Output Short Circuit Current –150 –80 –60 mA VOUT = GND
IEE VEE Power Supply Current –37 –24 –17 mA D0–D5 = VBB
ITTL VTTL Power Supply Current — 42 65 mA D0–D5 = VBB
VBB Ouptut Reference Voltage –1380 –1320 –1260 mV IVBB = –2.1mA
IH Single-Ended Input HIGH –1165 —–880 mV Guaranteed HIGH Signal for All Inputs (with One
V
Voltage Tied to VBB)
IL Single-Ended Input LOW –1810 —–1475 mV Guaranteed LOW Signal for All Inputs (with One
V
Voltage Tied to VBB)
AC ELECTRICAL CHARACTERISTICS
PLCC/FLATPACK
VEE = –4.2V to –5.5V unless otherwise specified, VCC = VCCA = GND, VTTL = +4.5V to +5.5V
Symbol Parameter Min. Typ. Max. Unit Condition
PLH Propagation Delay 900 2100 2900 ps CL = 15pF, Figure 2
t
tPHL Data to Output
t
PLH Propagation Delay 900 3100 3700 ps CL = 50pF, Figure 2
tPHL Data to Output
2
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Micrel
SWITCHING WAVEFORM
SY100S325
INPUT
t
PLH
ATTENUATED
OUTPUT
Figure 1. Propagation Delay
NOTE:
VEE = –4.2V to –5.5V unless otherwise specified, VCC = VCCA = GND
TEST CIRCUITS
V
TTL
0.1µF
OPEN
20%
0.7 ± 0.1 ns0.7 ± 0.1 ns
–0.95V
80%
50%
–1.69V
t
PHL
50%
V
BB
GENERATOR
NOTES:
VCC = 0V, VEE = –4.5V, VTTL = +5V
L1 and L2 = equal length 50Ω impedance lines
RT = 50Ω terminator internal to scope
Decoupling 0.1µF from GND to VCC, VEE and VTTL
All unused outputs are loaded with 500Ω to GND
CL = Fixture and stray capacitance = 3pF
PULSE
C
V
EE
V
SCOPE
CHAN A
L1
R
T
CC
Figure 2. AC Test Circuit for 15pF Loading
PRODUCT ORDERING CODE
Ordering Package Operating
SY100S325FC F24-1 Commercial
SY100S325JC J28-1 Commercial
SY100S325JCTR J28-1 Commercial
L2
450Ω
L
R
T
SCOPE
CHAN B
Code Type Range
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Micrel
24 LEAD CERPACK (F24-1)
SY100S325
Rev. 03
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Micrel
28 LEAD PLCC (J28-1)
SY100S325
Rev. 03
MICREL-SYNERGY 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA
TEL + 1 (408) 980-9191 FAX + 1 (408) 914-7878 WEB http://www.micrel.com
This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or
other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.
© 2000 Micrel Incorporated
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