Datasheet

SCEA019 - January 2001
7–102 Texas Instruments GTLP Frequently Asked Questions
19 I need an alternate source. Are there any?
Several companies manufacture GTL and GTLP devices. Fairchild (FSC) entered the market
in 1997. Pericom and Philips also recently entered the market.
Pericom’s two released offerings closely match the FSC GTLP data-sheet specifications, and
it is assumed that their other planned offerings will also.
Philips markets their GTL devices toward the bus on the card/microprocessor interface market
much like TI’s existing GTL family. The GTL family has faster edge rates and is not optimized
for backplane applications.
TI offers a wide range of medium-drive GTLP devices, a wider range of high-drive GTLP
devices, and the widest range of packaging offerings. These devices support the needs of the
emerging high-data-throughput parallel-backplane market. Additionally, TI has included a
BIAS V
CC
feature in the medium- and high-drive GTLP devices in place of one of the V
CC
pins, to support true live insertion. The BIAS V
CC
circuitry is disabled when V
CC
is applied;
therefore, except for the precharge feature, the TI device is fully functional in competitors’
sockets.
All devices occupying the comparable bit width/drive box in Table 6 are pin-for-pin functional
equivalents.
All 816/817 devices have the same pinout. They are one GTLP input to six TTL/LVTTL
outputs and one TTL/LVTTL input to two GTLP outputs, but are various drives and V
CC
. Refer
to the data sheet, then test each device to pick the best one for your application.
Table 6. GTLP Device Cross-Reference
TI - SN74GTLP Fairchild - GTLP Pericom - GTLP
Bit Width
Medium Drive High Drive Medium Drive High Drive Medium Drive High Drive
32 H32945 H3245
18 H16912 H1612 18T612 18T612
H16612 16612 16612A
17 H16916 H1616 17T616
16616 16616
16617 16617
16 H1655 16T1655 16T1655
H16945 H1645
8 H306 8T306 8T306
6 817 6C817
6C816A
6C816 6C816
2 1394
Legend
H16612 (underline)
= 3.3- and 5-V or 5-V V
CC
operation
= Released to Market
H16912 (black)
= 3.3-V V
CC
while 18T612 (blue italics) is 3.3-V V
CC
but not 5-V tolerant
Medium Drive = 50 mA, High Drive = 100 mA