ICS87004I-03 Datasheet, PDF (2/12 Pages) Integrated Device Technology – LVCMOS/LVTTL FANOUT BUFFER/DIVIDER Maximum output frequency: 250MHz

ICS87004I-03
LVCMOS/LVTTL FANOUT BUFFER/DIVIDER
PRELIMINARY
TABLE 1. PIN DESCRIPTIONS
Number
Name
Type
Description
1
2, 3, 4
V_DD
Power
Power supply pin.
NA2, NA1, NA0 Input Pulldown N divider pins for Bank A outputs. LVCMOS / LVTTL interface levels.
5, 7
CLK0, CLK1 Input Pulldown Single-ended clock inputs. LVCMOS / LVTTL interface levels.
6
CLK_SEL
Input
Pulldown
Clock select input. When HIGH, selects CLK1 input.
When LOW, selects CLK0 input. LVCMOS / LVTTL interface levels.
8, 9, 10 NB2, NB1, NB0 Input Pulldown N divider pins for Bank B outputs. LVCMOS / LVTTL interface levels.
Output enable. When LOW, Bank B outputs are in HIGH impedance
11
OEB
Input Pullup state. When HIGH, Bank B outputs are active.
LVCMOS / LVTTL interface levels.
12, 16
GND
Power
Power supply ground.
13
14, 15
V_DDOB
QB0, QB1
Power
Output
Output supply pin for Bank B outputs.
Single-ended Bank B clock outputs. LVCMOS / LVTTL interface levels.
17, 18
QA1, QA0
Output
Single-ended Bank A clock outputs. LVCMOS / LVTTL interface levels.
19
V_DDOA
Power
Bank A output supply pin.
Output enable. When LOW, Bank A outputs are in HIGH impedance
20
OEA
Input Pullup state. When HIGH, Bank A outputs are active.
LVCMOS / LVTTL interface levels.
NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol
C_IN
R_PULLUP
R_PULLDOWN
C_PD
R_OUT
Parameter
Input Capacitance
Input Pullup Resistor
Input Pulldown Resistor
Power Dissipation Capacitance
(per output)
Output Impedance
Test Conditions
Minimum
Typical
4
51
51
Maximum
Units
pF
kΩ
kΩ
10
pF
15
Ω
TABLE 3. PROGRAMMABLE OUTPUT DIVIDER FUNCTION TABLE
Inputs
N2
N1
N0
N Divider Value
Output Frequency
(MHz)
0
0
0
÷1 (default)
250
0
0
1
÷2
125
0
1
0
÷3
83.333
0
1
1
÷4
62.5
1
0
0
÷5
50
1
0
1
÷6
41.667
1
1
0
÷8
31.25
1
1
1
÷16
15.625
NOTE: Some combinations of Bank A and Bank B output divider
selections are not synchronous.
IDT^™ / ICS^™ LVCMOS/LVTTL FANOUT BUFFER/DIVIDER
2
ICS87004BGI-03 REV. B JUNE 10, 2008