Datasheet
SN74ABT18502
SCAN TEST DEVICE
WITH 18-BIT REGISTERED BUS TRANSCEIVER
SCBS753 – FEBRUARY 2002
24
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions (see Note 3)
MIN MAX UNIT
V
CC
Supply voltage 4.5 5.5 V
V
IH
High-level input voltage 2 V
V
IL
Low-level input voltage 0.8 V
V
I
Input voltage 0 V
CC
V
I
OH
High-level output current –32 mA
I
OL
Low-level output current 64 mA
∆t/∆v Input transition rise or fall rate 10 ns/V
T
A
Operating free-air temperature –40 85 °C
NOTE 3: All unused inputs of the device must be held at V
CC
or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
T
A
= 25°C
MIN
MAX
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYP
†
MAX
MIN
MAX
UNIT
V
IK
V
CC
= 4.5 V, I
I
= –18 mA –1.2 –1.2 V
V
CC
= 4.5 V, I
OH
= – 3 mA 2.5 2.5
V
OH
V
CC
= 5 V, I
OH
= – 3 mA 3 3
V
V
OH
V
CC
= 4.5 V, I
OH
= – 24 mA 2 2
V
V
CC
= 4.5 V, I
OH
= – 32 mA 2
V
OL
V
CC
=45V
I
OL
= 48 mA 0.55 0.55
V
V
OL
V
CC
=
4
.
5
V
I
OL
= 64 mA 0.55
V
I
I
V
CC
=55V
V
I
=V
CC
or GND
CLK,LE,OE,TCK ±1 ±1
µA
I
I
V
CC
=
5
.
5
V
,
V
I
=
V
CC
or
GND
A or B ports ±100 ±100
µ
A
I
IH
V
CC
= 5.5 V, V
I
= V
CC
TDI, TMS 10 10 µA
I
IL
V
CC
= 5.5 V, V
I
= GND TDI, TMS –150 –150 µA
I
OZH
‡
V
CC
= 5.5 V, V
O
= 2.7 V 50 50 µA
I
OZL
‡
V
CC
= 5.5 V, V
O
= 0.5 V –50 –50 µA
I
OZPU
V
CC
= 0 to 2 V, V
O
= 2.7 V or 0.5 V,
OE = 0.8 V
±50 ±50 µA
I
OZPD
V
CC
= 2 V to 0, V
O
= 2.7 V or 0.5 V,
OE = 0.8 V
±50 ±50 µA
I
off
V
CC
= 0, V
I
or V
O
≤ 4.5 V ±100 ±450 µA
I
CEX
V
CC
= 5.5 V, V
O
= 5.5 V Outputs high 50 50 µA
I
O
§
V
CC
= 5.5 V, V
O
= 2.5 V –50 –110 –200 –50 –200 mA
V
CC
=
5.5 V,
Outputs high 3.5 5.5 5.5
I
CC
V
CC
=
5
.
5
V
,
I
O
= 0,
A or B ports
Outputs low 33 38 38
mA
V
I
= V
CC
or GND
Outputs disabled 2.9 5 5
∆I
CC
¶
V
CC
= 5.5 V, One input at 3.4 V, Other inputs at V
CC
or GND 50 50 µA
C
i
V
I
= 2.5 V or 0.5 V Control inputs 3 pF
C
io
V
O
= 2.5 V or 0.5 V A or B ports 10 pF
C
o
V
O
= 2.5 V or 0.5 V TDO 8 pF
†
All typical values are at V
CC
= 5 V.
‡
The parameters I
OZH
and I
OZL
include the input leakage current.
§
Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
¶
This is the increase in supply current for each input that is at the specified TTL voltage level rather than V
CC
or GND.