GTLP1B151 1-Bit LVTTL/GTLP Transceiver with Separate LVTTL Port and Feedback Path
June 2001
Revised February 2002
GTLP1B151
1-Bit LVTTL/GTLP Transceiver
with Separate LVTTL Port and Feedback Path
General Description
The GTLP1B151 is a 1-bit transceiver that provides
LVTTL-to-GTLP signal level translation. Individual LVTTL
and GTLP driver enables are also available. The
GTLP1B151 offers separate LVTTL inputs and outputs,
and can provide a feedback path for control and diagnos-
tics monitoring.
High-speed backplane operation is a direct result of
GTLP鈥檚 reduced output swing (
<
1V), reduced input thresh-
old levels and output edge rate control. The edge rate
control minimizes bus-settling time. GTLP is a Fairchild
Semiconductor derivative of the Gunning Transistor Logic
(GTL) JEDEC standard JESD8-3.
Fairchild鈥檚 GTLP has internal edge-rate control and is pro-
cess, voltage and temperature compensated. GTLP鈥檚 I/O
structure is similar to GTL and BTL but offers different out-
put levels and receiver threshold. Typical GTLP output volt-
age levels are: V
OL
=
0.5V, V
OH
=
1.5V, and V
REF
=
1V.
Features
s
Separate LVTTL inputs and outputs
s
A feedback path for control and diagnostics monitoring
s
Bidirectional interface between GTLP and LVTTL logic
levels
s
Designed with edge rate control circuitry to reduce out-
put noise on the GTLP port
s
V
REF
pin provides external supply reference voltage for
receiver threshold adjustibility
s
Special PVT compensation circuitry to provide consis-
tent performance over variations of process, supply volt-
age and temperature
s
TTL compatible driver and control inputs
s
Designed using Fairchild advanced BiCMOS technology
s
Bushold data inputs on A port to eliminate the need for
external pull-up resistors for unused inputs
s
Power up/down and power off high impedance for live
insertion
s
Open drain on GTLP to support wired-or connection
s
Flow through pinout optimizes PCB layout
s
A Port source/sink
鈭?/div>
24mA /
+
24mA
s
B Port sink
+
50mA
Ordering Code:
Order Number
GTLP1B151M
GTLP1B151MX
GTLP1B151K8X
Package Number
M08A
M08A
MAB08A
(Preliminary)
Package Description
8-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
[TUBE]
8-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
[TAPE and REEL]
8-Lead US8, JEDEC MO-187, Variation CA 3.1mm Wide
[TAPE and REEL]
漏 2002 Fairchild Semiconductor Corporation
DS500484
www.fairchildsemi.com
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