TL712
DIFFERENTIAL COMPARATOR
SLCS002B – JUNE 1983 – REVISED DECEMBER 1992
D
Operates From a Single 5-V Supply
D
0 to 5 V Common-Mode Input Voltage
Range
D
Self-Biased Inputs
D
Complementary 3-State Outputs
D
Enable Capability
D
Hysteresis ...5 mV Typ
D
Response Times . . . 25 ns Typ
description
The TL712 is a high-speed comparator fabricated
with bipolar Schottky process technology. The
circuit has differential analog inputs and
complementary 3-state TTL-compatible logic
outputs with symmetrical switching
characteristics. When the output enable, (OE), is
low, both outputs are in the high-impedance state.
This device operates from a single 5-V supply and
is useful as a disk memory read-chain data
comparator.
The TL712 is characterized for operation from
0°C to 70°C.
D, JG, P, OR PW PACKAGE
(TOP VIEW)
NC
1
IN–
2
IN+
3
OE
4
NC–No internal connection
symbol (positive logic)
4
OE
2
IN–
3
IN+
8
7
6
5
V
CC
OUT–
OUT+
GND
7
6
OUT–
OUT+
schematics of inputs and outputs
EQUIVALENT OF EACH
DIFFERENTIAL INPUT
V
CC
4 kΩ
Nom
Input
960 Ω
Nom
960 Ω
Nom
EQUIVALENT OF EACH ENABLE INPUT TYPICAL OF ALL OUTPUTS
V
V
CC
8.3 kΩ
Nom
OE
CC
85 Ω
Nom
Output
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1992, Texas Instruments Incorporated
1
TL712
TTL load
See Figure 1
See Note 3
DIFFERENTIAL COMPARATOR
SLCS002B – JUNE 1983 – REVISED DECEMBER 1992
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
Input voltage, V
Differential input voltage, V
Enable input voltage 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low-level output current, I
Operating free-air temperature range, T
Storage temperature range – 65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: JG package 300°C. . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D, P, or PW package 260°C. . . . . . . . . . . .
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated in the “recommended operating conditions” section of
this specification is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltage values, except differential voltages, are with respect to the network ground.
2. Differential voltage values are at IN+ with respect to IN–.
(see Note 1) 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC
, any differential input ±25 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I
(see Note 2) ±25 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ID
50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OL
0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A
recommended operating conditions
MIN NOM MAX UNIT
Supply voltage, V
Common-mode input voltage, V
High-level output current, I
Low-level output current, I
Operating free-air temperature, T
CC
OH
OL
IC
A
4.75 5 5.25 V
0 5 V
–1 mA
16 mA
0 70 °C
†
electrical characteristics at VCC = 5 V, TA = 25°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
Threshold voltage (VT+ and VT–) V
T
V
Hysteresis (VT+ – VT–) 5 mV
hys
V
High-level output voltage VID = 100 mV, IOH = –1 mA 2.7 3.5 V
OH
V
Low-level output voltage VID = – 100 mV, IOL = 16 mA 0.4 0.5 V
OL
I
Off-state output current VO = 2.4 V –20 µA
OZ
I
Enable current VI = 5.5 V 100 µA
I
IIH High-level enable current VIH = 2.7 V 20 µA
I
Low-level enable current VIL = 0.4 V –360 µA
IL
r
DIfferential input resistance 4 kΩ
i
r
Output resistance 100 W
o
I
Short-circuit output current –15 –85 mA
OS
I
Supply current VID = 0,No load 17 20 mA
CC
‡
The algebraic convention, where the more negative limit is designated as minimum, is used in this data sheet for input threshold voltage levels
only.
= 0 to 5 V –100
ICR
‡
100 mV
switching characteristics, VCC = 5 V, TA = 25°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
Propagation delay time, low-to-high-level output
PLH
t
Propagation delay time, high-to-low-level output
PHL
NOTE 3: The response time specified is for a 100-mV input step with 5-mV overdrive (105 mV total), and is the interval between the input step
function and the instant when the output crosses 2.5 V.
,
,
25 ns
25 ns
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL712
DIFFERENTIAL COMPARATOR
SLCS002B – JUNE 1983 – REVISED DECEMBER 1992
PARAMETER MEASUREMENT INFORMATION
5 V
2 kΩ
OUTPUT RESPONSE FOR VARIOUS
Differential
Input Voltage
5
4
3
2
– Output Voltage – V
1
O
V
0
Output
Figure 1. TTL Output Load Circuit
TYPICAL CHARACTERISTICS
INPUT OVERDRIVE VOLTAGES
VCC = 5 V
TTL Load
TA = 25°C
100 mV + Overdrive
100 mV
50 mV
20 mV
5 mV
0 10203040
5152535
t – Time – ns
1N4148
OUTPUT RESPONSE FOR VARIOUS
Differential
Input Voltage
5
4
100 mV
3
2
– Output Voltage – V
1
O
V
0
INPUT OVERDRIVE VOLTAGES
VCC = 5 V
TTL Load
TA = 25°C
100 mV + Overdrive
50 mV
20 mV
5152535
0 10203040
t – Time – ns
5 mV
Figure 2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Figure 3
3
TL712
DIFFERENTIAL COMPARATOR
SLCS002B – JUNE 1983 – REVISED DECEMBER 1992
4
3
2
Input Voltage
– Common-Mode
1
IC
0
1.7
1.65
1.6
1.55
– Output Voltage – V V
O
1.5
V
TYPICAL CHARACTERISTICS
COMMON-MODE
PULSE RESPONSE
VCC = 5 V
TA = 25°C
50 Ω
V
O
50 Ω
V
IC
20 60 100 160
0 40 80 120 140
t – Time – ns
Figure 4
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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