Revised February 2002
GTLP2T152
2-Bit LVTTL/GTLP Transceiver
General Description
Features
The GTLP2T152 is a 2-bit transceiver that provides LVTTLto-GTLP signal level translation. Data directional control is
handled with a transmit/receive pin. High-speed backplane
operation is a direct result of GTLP’s reduced output swing
(2000V
ESD Rating
−40°C to +85°C
Operating Temperature (TA)
DC Output Diode Current (IOK)
Storage Temperature (TSTG)
3.15V to 3.45V
Supply Voltage VCC
DC Output Voltage (VO)
−65°C to +150°C
Note 2: IO Absolute Maximum Rating must be observed.
DC Electrical Characteristics
Over Recommended Operating Free-Air Temperature Range, VREF = 1.0V (unless otherwise noted).
Symbol
VIH
VIL
Min
Test Conditions
Typ
B Port
VREF + 0.05
Others
2.0
B Port
0.0
VTT
VREF − 0.05
Others
VREF
B Port
VTT
B Port
VIK
VOH
VOL
A Port
A Port
B Port
II
Control Pins
0.8
0.7V
1.0
VREF + 50 mV
1.5
VCC = 3.15V
II = −18 mA
VCC = Min to Max (Note 4)
IOH = −100 µA
VCC = 3.15V
IOH = −8 mA
2.4
IOH = -24 mA
2.2
IOFF
V
V
V
IOL = 100 µA
0.2
IOL = 8 mA
0.4
VCC = 3.15V
IOL = 24 mA
0.5
VCC = 3.15V
IOL = 40 mA
0.4
IOL = 50 mA
0.55
VCC = 3.45V
VCC = 3.45V
V
V
VCC
VCC = 3.15V
VCC = 3.45V
V
−1.2
VCC = Min to Max (Note 4)
VI = 3.45V
5
−5
VI = 3.45V
10
VI = 0V
B Port
1.3V
Units
VCC - 0.2
VI = 0V
A Port
Max
(Note 3)
−10
VI = 3.45V
5
V
V
µA
µA
µA
VI = 0
−5
VCC = 0
VI or VO = 0 to 3.45V
30
µA
B Port
VCC = 0
VI or VO = 0 to 3.45V
30
µA
A Port
VCC = 3.15V
VI = 0.8V
A Port,
Control Pins
II (HOLD)
IOZH
A Port
B Port
VCC = 3.45V
75
VI = 2.0V
−75
VO = 3.45V
10
VO = 3.45V
5
3
µA
µA
www.fairchildsemi.com
GTLP2T152
Absolute Maximum Ratings(Note 1)
GTLP2T152
DC Electrical Characteristics
Symbol
IOZL
A Port
(Continued)
Min
Test Conditions
VCC = 3.45V
B Port
Typ
Max
(Note 3)
VO = 0V
−10
VO = 0V
−5
IPU/PD
All Ports
VCC = 0 to 1.5V
VI = 0 to 3.45V
30
ICC
A Port
VCC = 3.45V
Outputs HIGH
11
or B Port
Units
µA
µA
IO = 0
Outputs LOW
11
VI = VCC/VTT or GND
Outputs Disabled
11
One Input at VCC
2
mA
mA
∆ICC
A Port and
VCC = 3.45V,
(Note 5)
Control Pins
A or Control Inputs at VCC or GND −0.6V
Ci
Control Pins
VI = VCC or 0
3
pF
CI/O
A Port
VI = VCC or 0
5
pF
B Port
VI = VTT or 0
5.5
pF
Note 3: All typical values are at VCC = 3.3V and TA = 25°C.
Note 4: For conditions shown as Min, use the appropriate value specified under recommended operating conditions.
Note 5: This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND.
Note: GTLP V REF and VTT are specified to 2% tolerance since signal integrity and noise margin can be significantly degraded if these supplies are noisy. In
addition, VTT and RTERM can be adjusted beyond the recommended operating to accommodate backplane impedances other than 50Ω, but must remain
within the boundaries of the DC Absolute Maximum Ratings. Similarly, VREF can be adjusted to optimize noise margin.
AC Electrical Characteristics
Over recommended range of supply voltage and operating free-air temperature, VREF = 1.0V (unless otherwise noted).
CL = 30 pF for B Port and CL = 50 pF for A Port.
Symbol
tPLH
tPHL
tPLH
tPHL
From
To
(Input)
(Output)
A
B
Min
1.2
B
A
Typ
Max
(Note 6)
2.9
7.3
0.8
2.0
4.5
1.4
2.5
4.4
2.7
5.0
1.6
Unit
ns
ns
tRISE
Transition Time, B Outputs (20% to 80%)
1.5
ns
tFALL
Transition Time, B Outputs (80% to 20%)
1.8
ns
tRISE
Transition Time, A Outputs (10% to 90%)
2.5
ns
tFALL
Transition Time, A Outputs (90% to 10%)
2.2
ns
Note 6: All typical values are at VCC = 3.3V, and TA = 25°C.
www.fairchildsemi.com
4
Test Circuit for A Outputs
Test
Test Circuit for B Outputs
S
tPLH/tPHL OPEN
tPLZ/tPZL
Note: CL includes probes and Jig capacitance.
Note: For B Port, CL = 30 pF is used for worst case.
6V
tPHZ/tPZH GND
Note: C L includes probes and Jig capacitance.
Voltage Waveforms Propagation Delay
Voltage Waveform Enable and Disable Times
A or LVTTL
Pins
B or GTLP
Pins
VINHIGH
VCC
1.5
VINLOW
0.0
0.0
VM
VCC/2
1.0
VX
VOL + 0.3V
N/A
VY
VOH − 0.3V
N/A
Note: Waveform 1 is for an output with internal conditions such that the output is LOW except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is HIGH except when disabled by the output control.
Note: All input pulses have the following characteristics:
Frequency = 10MHz, tRISE = tFALL = 2 ns (10% to 90%), ZO = 50Ω. The outputs are measured one at a time with one transition per measurement.
5
www.fairchildsemi.com
GTLP2T152
Test Circuits and Timing Waveforms
GTLP2T152
Physical Dimensions inches (millimeters) unless otherwise noted
8-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
Package Number M08A
www.fairchildsemi.com
6
GTLP2T152 2-Bit LVTTL/GTLP Transceiver
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
8-Lead US8, JEDEC MO-187, Variation CA 3.1mm Wide
Package Number MAB08A
Preliminary
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
2. A critical component in any component of a life support
device or system whose failure to perform can be reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the
user.
www.fairchildsemi.com
7
www.fairchildsemi.com
