Datasheet
SCEA019 - January 2001
Texas Instruments GTLP Frequently Asked Questions 7–101
UBT devices can be used for many different logic functions, reducing the number of different
devices you have to buy. This reduces the number of other types of devices that must be
maintained in inventory. Ordering larger quantities of UBT devices can reduce the price.
However, simpler functions normally are less expensive. Backplane applications usually
require only bus-transceiver functionality. Other applications might need more complex
functions. The functions available from a UBT device or UBT device with clock enable are
listed in Table 5.
The GTLPH306 is a functional equivalent of the ‘245, the GTLPH16945 is a pin-for-pin
functional equivalent of the ‘16245, and the GTLPH16912 is a pin-for-pin functional equivalent
of the ‘16601.
Table 5. UBT Equivalent-Functions Table
Function 8 Bit 9 Bit 10 Bit 16 Bit 18 Bit
Transceiver
‘245, ‘623, ‘645
‘863 ‘861
‘16245, ‘16623
‘16863
Buffer/driver ‘214, ‘244, ‘541 ‘827 ‘16241, ‘16244, ‘16541 ‘16825
Latched transceiver ‘543 ‘16543 ‘16472
Latch ‘373, ‘573 ‘843 ‘841 ‘16373 ‘16843
Registered transceiver ‘646, ‘652 ‘16646, ‘16652 ‘16474
Flip-flop ‘374, ‘574 ‘821 ‘16374
Universal bus driver ‘16835
Standard UBT ‘16500, ‘16501
GTLPH1655 replaces above functions and is similar to the ’16501 standard UBT (OEAB, OEBA, LEAB, LEBA,
CLKAB, CLKBA), but is at GTLP levels on the B port and is split into two 8-bit sections.
Registered transceiver with clock
enable
‘2952 ‘16470, ‘16952
Flip-flop with clock enable ‘377 ‘823 ‘16823
Standard UBT with clock enable ‘16600, ‘16601
GTLPH16612, ’169121/6, and ’1612/6 replace all above functions and are identical to the ’16601 Standard UBT with
clock enable, but are at GTLP levels on the B port.