TNETA1575 datasheet(20/45 Pages) TI1

20 / 45 page

TNETA1575

ATM SEGMENTATION AND REASSEMBLY DEVICE

WITH PCI-HOST AND COPROCESSOR INTERFACES

SDNS040C – MAY 1996 – REVISED JUNE 1998

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

JTAG interface

The TNETA1575 supports boundary scan through a five-wire JTAG interface in accordance with IEEE

Std 1149.1–1990 (includes IEEE Std 1149.1a–1993), IEEE Standard Test Access Port and Boundary-Scan

Architecture.

The maximum operating frequency is 10 MHz for the JTAG interface.

JTAG instruction set.

The TNETA1575 supports the following instructions:

INSTRUCTION

OP CODE

(BINARY FORMAT)

Extest

000

Idcode

100

Sample/Preload

001

Bypass

111

Internal Scan

010

High Z

101

idcode

VARIANT

PART NUMBER

MANUFACTURER

LEAST SIGNIFICANT BIT

Bit number

31–28

27–12

11–1

Binary code

0000

00000010111

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†

Supply voltage range, VCC (see Note 1)

–0.5 V to 4 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supply voltage range, VCC(5V) (see Note 1)

–0.5 V to 5.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range, standard TTL, 3-V PCI, VI

–0.5 V to VCC + 0.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range, 5-V tolerant TTL, VI

VCC(5V) + 0.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output voltage range, standard TTL, 3-V PCI, VO

–0.5 V to VCC + 0.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output voltage range, 5-V tolerant TTL, VO

5 V to VCC + 0.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input clamp current, TTL, IIK (VI < 0 or VI > VCC) (see Note 2)

±20 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 3)

±20 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range, TA

°C to 70°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, Tstg

–65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES:

1. All voltage values are with respect to the GND terminals.

2. Applies for external input and bidirectional buffers without hysteresis. VI>VCC doesnotapplytofail-safeterminals.UseVI > VCC(5V)

for 5-V tolerant terminals.

3. Applies for external output and bidirectional buffers. VO > VCC does not apply to fail-safe terminals. Use VO > VCC(5V) for 5-Vtolerant

terminals.

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