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ꢓꢀ
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SCAS276A − NOVEMBER 1993 − REVISED JULY 1995
DGG PACKAGE
(TOP VIEW)
D Member of the Texas Instruments
Widebus+ Family
D EPIC (Enhanced-Performance Implanted
D UBT (Universal Bus Transceiver)
Combines D-Type Latches and D-Type
Flip-Flops for Operation in Transparent,
Latched, or Clocked Mode
1CLKENAB
LEAB
CLKAB
1ERRA
1APAR
GND
1CLKENBA
LEBA
CLKBA
1ERRB
1BPAR
GND
1B1
1B2
1B3
1
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
CMOS) Submicron Process
2
3
4
5
6
D Simultaneously Generates and Checks
1A1
1A2
1A3
7
Parity
8
D Option to Select Generate Parity and Check
or Feed-Through Data/Parity in A-to-B or
B-to-A Directions
9
V
V
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
CC
CC
1A4
1A5
1A6
GND
1A7
1A8
2A1
2A2
GND
2A3
2A4
2A5
1B4
1B5
1B6
GND
1B7
1B8
2B1
2B2
GND
2B3
2B4
2B5
D Distributed V
and GND Pin Configuration
Minimizes High-Speed Switching Noise
CC
D Latch-Up Performance Exceeds 250 mA
Per JEDEC Standard JESD-17
D Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
D Packaged in Thin Shrink Small-Outline
(DGG) Package
description
V
V
CC
CC
2A6
2A7
2A8
GND
2B6
2B7
2B8
GND
2BPAR
2ERRB
OEBA
ODD/EVEN
2CLKENBA
This 18-bit (dual-octal) noninverting registered
transceiver is designed for 2.7-V to 3.6-V V
operation.
CC
The SN74ALVC16901 is a dual 9-bit to dual 9-bit
parity transceiver with registers. The device can
operate as a feed-through transceiver or it can
generate/check parity from the two 8-bit data
buses in either direction.
2APAR
2ERRA
OEAB
SEL
2CLKENAB
The SN74ALVC16901 features independent
clock (CLKAB or CLKBA), latch-enable (LEAB or
LEBA), and dual 9-bit clock-enable (CLKENAB or
CLKENBA) inputs. It also provides parity-enable (SEL) and parity-select (ODD/EVEN) inputs and separate
error-signal (ERRA or ERRB) outputs for checking parity. The direction of data flow is controlled by OEAB and
OEBA. When SEL is low, the parity functions are enabled. When SEL is high, the parity functions are disabled
and the device acts as an 18-bit registered transceiver.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
The SN74ALVC16901 is available in TI’s thin shrink small-outline (DGG) package, which provides twice the I/O
pin count and functionality of standard small-outline packages in the same printed-circuit-board area.
The SN74ALVC16901 is characterized for operation from −40°C to 85°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Widebus+, EPIC, and UBT are trademarks of Texas Instruments Incorporated.
ꢖꢓ ꢙ ꢜꢑ ꢇ ꢐꢏ ꢙ ꢁ ꢜ ꢄꢐꢄ ꢝꢞ ꢟ ꢠꢡ ꢢ ꢣꢤ ꢝꢠꢞ ꢝꢥ ꢦꢧ ꢡ ꢡ ꢨꢞꢤ ꢣꢥ ꢠꢟ ꢩꢧꢪ ꢫꢝꢦ ꢣꢤ ꢝꢠꢞ ꢬꢣ ꢤꢨ ꢭ
ꢖꢡ ꢠ ꢬꢧꢦ ꢤ ꢥ ꢦ ꢠꢞ ꢟꢠ ꢡ ꢢ ꢤ ꢠ ꢥ ꢩꢨ ꢦ ꢝꢟ ꢝꢦꢣ ꢤꢝ ꢠꢞꢥ ꢩꢨ ꢡ ꢤꢮ ꢨ ꢤꢨ ꢡ ꢢꢥ ꢠꢟ ꢐꢨꢯ ꢣꢥ ꢏꢞꢥ ꢤꢡ ꢧꢢ ꢨꢞꢤ ꢥ
ꢥ ꢤ ꢣ ꢞꢬ ꢣ ꢡꢬ ꢰ ꢣ ꢡꢡ ꢣ ꢞ ꢤꢱꢭ ꢖꢡ ꢠ ꢬꢧꢦ ꢤꢝꢠꢞ ꢩꢡ ꢠꢦ ꢨꢥ ꢥꢝ ꢞꢲ ꢬꢠꢨ ꢥ ꢞꢠꢤ ꢞꢨ ꢦꢨ ꢥꢥ ꢣꢡ ꢝꢫ ꢱ ꢝꢞꢦ ꢫꢧꢬ ꢨ
ꢤ ꢨ ꢥ ꢤꢝ ꢞꢲ ꢠꢟ ꢣ ꢫꢫ ꢩꢣ ꢡ ꢣ ꢢ ꢨ ꢤ ꢨ ꢡ ꢥ ꢭ
Copyright 1995, Texas Instruments Incorporated
1
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