MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Quad MECL to TTL Translator
The MC10125 is a quad translator for interfacing data and control signals
between the MECL section and saturated logic sections of digital systems. The
MC10125 incorporates differential inputs and Schottky TTL “totem pole”
outputs. Differential inputs allow for use as an inverting/ non–inverting translator
or as a differential line receiver. The VBB reference voltage is available on pin 1
for use in single–ended input biasing. The outputs of the MC10125 go to a low
logic level whenever the inputs are left floating.
Power supply requirements are ground, +5.0 Volts and –5.2 Volts.
Propagation delay of the MC10125 is typically 4.5 ns. The MC10125 has fanout
of 10 TTL loads. The dc levels are MECL 10,000 in and Schottky TTL, or TTL
out. This device has an input common mode noise rejection of
±
1.0 Volt.
An advantage of this device is that MECL level information can be received,
via balanced twisted pair lines, in the TTL equipment. This isolates the MECL
logic from the noisy TTL environment. This device is useful in computers,
instrumentation, peripheral controllers, test equipment and digital
communications systems.
MC10125
L SUFFIX
CERAMIC PACKAGE
CASE 620–10
P SUFFIX
PLASTIC PACKAGE
CASE 648–08
FN SUFFIX
PLCC
CASE 775–02
PD = 380 mW typ/pkg (No Load)
tpd = 4.5 ns typ (50% to + 1.5 Vdc out)
tr, tf = 2.5 ns typ (1.0 V to 2.0 V)
VBB
DIP
PIN ASSIGNMENT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GND
DIN
DIN
DOUT
COUT
CIN
CIN
VCC
LOGIC DIAGRAM
2
3
6
7
10
11
14
15
VBB*
Gnd
=
VCC (+5.0Vdc) =
VEE (–5.2Vdc) =
PIN 16
PIN 9
PIN 8
4
AIN
AIN
AOUT
BOUT
BIN
12
BIN
VEE
5
13
1
Pin assignment is for Dual–in–Line Package.
For PLCC pin assignment, see the Pin Conversion
Tables on page 6–11 of the Motorola MECL Data
Book (DL122/D).
* VBB to be used to supply bias to the MC10125 only and bypassed (when used)
with 0.01
µF
to 0.1
µF
capacitor to ground (0 V). VBB can source < 1.0 mA.
When the input pin with the bubble goes positive, the output goes negative.
3/93
©
Motorola, Inc. 1996
3–89
REV 5
MC10125
ELECTRICAL CHARACTERISTICS
(continued)
TEST VOLTAGE VALUES
(Volts)
@ Test Temperature
–30°C
+25°C
+85°C
Pin
Under
Test
8
9
9
2
2
4
4
4
4
4
4
4
1
4
4
4
4
3
2
2
3
3,7,11,15
3,7,11,15
9
9
9
9
8
8
8
8
16
16
16
16
–2.0mA
–2.0mA
20mA
20mA
VIHH
–1.890
–1.810
–1.700
VILH
–2.890
–2.850
–2.825
VBB
From
Pin
1
VCC
+5.0
+5.0
+5.0
VEE
–5.2
–5.2
–5.2
Output
Condition
TEST VOLTAGE APPLIED TO PINS LISTED BELOW
VIHH
VILH
VBB
3,7,11,15
3,7,11,15
3,7,11,15
3,7,11,15
3,7,11,15
3,7,11,15
3,7,11,15
3,7,11,15
3,7,11,15
VCC
9
9
9
9
9
9
9
9
9
9
9
9
VEE
8
8
8
8
2,6,8,10,14
8
8
8
8
2,3,6,7,8,
10,11,14,15
8
8
Gnd
G d
16
16
16
Characteristic
Negative Power Supply
Drain Current
Positive Power Supply
pp y
Drain C
D i Current
t
Input Current
Input Leakage Current
High Output Voltage
Low Output Voltage
High Threshold Voltage
Low Threshold Voltage
Indeterminate Input
Protection Tests
Symbol
IE
ICCH
ICCL
IinH
1
ICBO
VOH
VOL
VOHA
VOLA
VOLS1
VOLS2
16
16
16
16
16
16
16
16
4, 16
–2.0mA
20mA
–2.0mA
20mA
20mA
20mA
Short Circuit Current
Reference Voltage
Common Mode Rejection Tests
IOS
VBB
VOH
VOL
Switching Times
(50Ω Load)
t6+5–
t6–5+
t2+4–
t2–4+
t4+
t4–
5
5
4
4
4
4
3,7,11,15
3,7,11,15
3,7,11,15
3,7,11,15
3,7,11,15
3,7,11,15
9
9
9
9
9
9
8
8
8
8
8
8
16
16
16
16
16
16
Propagation Delay
(50% to +1.5Vdc)
Rise Time
Fall Time
(+1.0V to 2.0V)
(+1.0V to 2.0V)
1. Individually test each output, apply VIHmax to pin under test.
Each MECL 10,000 series circuit has been designed to meet the dc specifications shown in the test table, after thermal equilibrium has been
established. The circuit is in a test socket or mounted on a printed circuit board and transverse air flow greater than 500 linear fpm is maintained.
Outputs are terminated through a 50-ohm resistor to –2.0 volts. Test procedures are shown for only one gate. The other gates are tested in the
same manner.
MOTOROLA
3–92
MECL Data
DL122 — Rev 6
MC10125
SWITCHING TIME TEST CIRCUIT
Vin
VCC
+5.0 Vdc
0.1
µF
Vout
Coax
Coax
Input
2
3
Pulse Generator
Input Pulse
t+ = t– = 2.0
±0.2
ns
(20 to 80%)
–1.69 Vdc
6
7
10
11
14
15
5
12
4
450
CL
13
CL = 25 pF, including test fixture
One input from each gate must be tied to VBB
(Pin 1) during testing.
1
50-ohm termination to ground located
in each scope channel input.
All input and output cables to the
scope are equal lengths of 50-ohm
coaxial cable. Wire length should be
< 1/4 inch from TPin to input pin and
TPout to output pin.
0.1
µF
16
VBB
8
0.1
µF
–5.2 Vdc
VEE
MECL Data
DL122 — Rev 6
3–93
MOTOROLA
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