SN54LVT18502
3.3-V ABT SCAN TEST DEVICE
WITH 18-BIT UNIVERSAL BUS TRANSCEIVERS
SCBS669 – JULY 1996
Member of the Texas Instruments SCOPE
Family of Testability Products
Compatible With the IEEE Standard
1149.1-1990 (JTAG) Test Access Port and
Boundary-Scan Architecture
Member of the Texas Instruments
Widebus Family
SCOPE Instruction Set
– IEEE Standard 1149.1-1990 Required
Instructions and Optional CLAMP and
HIGHZ
– Parallel-Signature Analysis at Inputs
– Pseudo-Random Pattern Generation
From Outputs
State-of-the-Art 3.3-V ABT Design Supports
Mixed-Mode Signal Operation (5-V Input
and Output Voltages With 3.3-V V
)
CC
Supports Unregulated Battery Operation
Down to 2.7 V
UBT (Universal Bus Transceiver)
Combines D-Type Latches and D-Type
Flip-Flops for Operation in Transparent,
Latched, or Clocked Mode
– Sample Inputs/Toggle Outputs
– Binary Count From Outputs
– Device Identification
– Even-Parity Opcodes
Bus Hold on Data Inputs Eliminates the
Need for External Pullup Resistors
Packaged in 68-Pin Ceramic Quad Flat (HV)
Packages Using 25-mil Center-to-Center
Spacings
HV PACKAGE
(TOP VIEW)
9
8
7
6
5
4
3
2 1 68 67 66 65 64 63 62 61
1A3
1A4
1A5
GND
1A6
1A7
1A8
1A9
NC
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
60 1B4
59 1B5
58 1B6
57 GND
56 1B7
55 1B8
54 1B9
53
V
CC
52 NC
51 2B1
50 2B2
49 2B3
48 2B4
47 GND
46 2B5
45 2B6
44 2B7
V
CC
2A1
2A2
2A3
GND
2A4
2A5
2A6
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
NC – No internal connection
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.
SCOPE, Widebus, and UBT are trademarks of Texas Instruments Incorporated.
Copyright 1996, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265