AX500-1BG896 ACTEL [Actel Corporation], AX500-1BG896 Datasheet - Page 46

• Manufacturer Part Number: AX500-1BG896
• Description: Axcelerator Family FPGAs
• Manufacturer: ACTEL [Actel Corporation]

Voltage-Referenced I/O Standards
GTL+
Gunning Transceiver Logic Plus is a high-speed bus standard (JESD8-3). It requires a differential amplifier input buffer
and an Open Drain output buffer. The V
supported across the full military temperature range.
Table 2-36 • DC Input and Output Levels
AC Loadings
Figure 2-19 • AC Test Loads
Table 2-37 • AC Waveforms, Measuring Points, and Capacitive Loads
Timing Characteristics
Table 2-38 • 2.5V GTL+ I/O Module
2 -3 2
* Measuring Point = V
Parameter
2.5V GTL+ I/O Module Timing
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
DP
PY
ICLKQ
OCLKQ
SUD
SUE
HD
HE
CPWHL
CPWLH
WASYN
REASYN
HASYN
CLR
PRESET
Axcelerator Family FPGAs
Min,V
N/A
Input Low (V)
V
REF
V
-0.2
Worst-Case Commercial Conditions V
IL
Input Buffer
Output Buffer
Clock-to-Q for the I/O input register
Clock-to-Q for the IO output register and the I/O enable
register
Data Input Set-Up
Enable Input Set-Up
Data Input Hold
Enable Input Hold
Clock Pulse Width High to Low
Clock Pulse Width Low to High
Asynchronous Pulse Width
Asynchronous Recovery Time
Asynchronous Removal Time
Asynchronous Clear-to-Q
Asynchronous Preset-to-Q
V
Max,V
REF
-0.1
trip
Input High (V)
V
Min,V
REF
V
REF
Description
+0.1
+0.2
V
IH
CCI
pin should be connected to 2.5V or 3.3V. Note that 2.5V GTL+ is not
Max,V
Test Point
CCA
N/A
Measuring Point* (V)
= 1.425V, V
v2.7
V
REF
CCI
Max,V
V
V
0.6
TT
= 2.3V, T
Min.
0.43
0.45
0.43
OL
25
10 pF
'–2' Speed
Max.
1.75
1.01
0.67
0.67
0.23
0.26
0.00
0.00
0.10
0.00
0.23
0.23
J
= 70°C
V
REF
Min.
Min,V
(typ) (V)
0.48
0.51
0.48
1.0
'–1' Speed
V
NA
OH
Max.
1.99
1.15
0.77
0.77
0.27
0.30
0.00
0.00
0.10
0.00
0.27
0.27
Min.
'Std' Speed
0.60
0.57
0.57
mA
I
NA
OL
C
load
Max.
2.35
1.36
0.90
0.90
0.31
0.35
0.00
0.00
0.10
0.00
0.31
0.31
10
(pF)
mA
I
NA
OH
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns