1
SY100S325
Micrel, Inc.
M9999-051607
hbwhelp@micrel.com or (408) 955-1690
LOW-POWER HEX
ECL-to-TTL
TRANSLATOR
DESCRIPTION
FEATURES
■Max. propagation delay of 3.7ns
■IEE 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 28-pin PLCC package
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.
SY100S325
PIN NAMES
Pin Function
D0–D5Data Inputs
D0–D5Inverting Data Inputs
Q0–Q5Data Outputs
VEES VEE Substrate
VTTL TTL VCC Power Supply
VCCA VCCO for ECL Outputs
Rev.: I Amendment: /0
Issue Date: May 2007
BLOCK DIAGRAM
D0Q0
D0
D1Q1
D1
D2Q2
D2
D3Q3
D3
D4Q4
D4
D5Q5
D5
VBB
2
SY100S325
Micrel, Inc.
M9999-051607
hbwhelp@micrel.com or (408) 955-1690
PACKAGE/ORDERING INFORMATION
Ordering Information
Package Operating Package Lead
Part Number Type Range Marking Finish
SY100S325JC J28-1 Commercial SY100S325JC Sn-Pb
SY100S325JCTR(1) J28-1 Commercial SY100S325JC Sn-Pb
SY100S325JY(2) J28-1 Industrial SY100S325JY with Matte-Tin
Pb-Free bar-line indicator
SY100S325JYTR(1, 2) J28-1 Industrial SY100S325JY with Matte-Tin
Pb-Free bar-line indicator
Notes:
1. Tape and Reel.
2. Pb-Free package is recommended for new designs.
28-Pin PLCC (J28-1)
18
17
16
15
14
13
12
567891011
26
27
28
1
2
3
4
Top View
PLCC
J28-1
25 24 23 22 21 20 19
VTTL
VCC
VCC
VCC
Q2
Q1
VTTL
D0
VEES
D1
Q0
D0
D1
D2
D4
D3
VEES
VEE
VBB
D2
D3
VEES
D5
Q4
Q3
Q5
D4
D5
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SY100S325
Micrel, Inc.
M9999-051607
hbwhelp@micrel.com or (408) 955-1690
AC ELECTRICAL CHARACTERISTICS
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
tPLH Propagation Delay 900 2100 2900 ps CL = 15pF, Figure 2
tPHL Data to Output
tPLH Propagation Delay 900 3100 3700 ps CL = 50pF, Figure 2
tPHL Data to Output
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
VOH 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
VIH Single-Ended Input HIGH –1165 —–880 mV Guaranteed HIGH Signal for All Inputs (with One
Voltage Tied to VBB)
VIL Single-Ended Input LOW –1810 —–1475 mV Guaranteed LOW Signal for All Inputs (with One
Voltage Tied to VBB)
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SY100S325
Micrel, Inc.
M9999-051607
hbwhelp@micrel.com or (408) 955-1690
SWITCHING WAVEFORM
Figure 1. Propagation Delay
tPLH
INPUT
ATTENUATED
OUTPUT
50%
0.7 ± 0.1 ns0.7 ± 0.1 ns –0.95V
20%
80%
50%
–1.69V
tPHL
TEST CIRCUITS
SCOPE
CHAN B
V
BB
V
TTL
V
EE
V
CC
0.1µF
OPEN
R
T
C
L
R
T
450ΩL2
PULSE
GENERATOR
SCOPE
CHAN A
L1
Figure 2. AC Test Circuit for 15pF Loading
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
Note:
VEE = –4.2V to –5.5V unless otherwise specified, VCC = VCCA = GND
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SY100S325
Micrel, Inc.
M9999-051607
hbwhelp@micrel.com or (408) 955-1690
28-PIN PLCC (J28-1)
Rev. 03
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet 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.
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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.
© 2006 Micrel, Incorporated.
