NJ8821BADP GEC [General Electric Company], NJ8821BADP Datasheet - Page 2

• Manufacturer Part Number: NJ8821BADP
• Description: FREQUENCY SYNTHESISER (MICROPROCESSOR INTERFACE) WITH RESETTABLE COUNTERS
• Manufacturer: GEC [General Electric Company]

2
NJ8821
ELECTRICAL CHARACTERISTICS AT V
DC Characteristics
AC Characteristics
NOTES
1. Data inputs have internal pull-up resistors to enable them to be driven from TTL outputs.
2. All counters have outputs directly synchronous with their respective clock rising edges.
3. The finite output resistance of the internal voltage follower and ‘on’ resistance of the sample switch driving this pin will add a finite time constant
4. Operation at up to 15MHz is possible with a full logic swing but is not guaranteed.
Supply current
OUTPUT LEVELS
Modulus Control Output (MC)
Lock Detect Output (LD)
PDB Output
INPUT LEVELS
Data Inputs (D0-D3)
Program Enable Input (PE)
Data Select Inputs (DS0-DS2)
F
Max. operating frequency, f
Propagation delay, clock to MC
Strobe pulse width, t
Data set-up time, t
Data hold time, t
Latch address set-up time, t
Latch address hold time, t
Digital phase detector propagation delay
Gain programming resistor, RB
Hold capacitor, CH
Output resistance, PDA
Digital phase detector gain
IN
Test conditions unless otherwise stated:
to the loop. An external 1nF hold capacitor will give a maximum time constant of 5 s, typically.
High level
Low level
Low level
Open drain pull-up voltage
High level
Low level
3-state leakage current
High level
Low level
High level
Low level
High level
Low level
and OSC IN input level
V
DD
–V
SS
=5V 0·5V. Temperature range NJ8821 BA: –30 C to +70 C; NJ8821MA: –40 C to +85 C
DH
DS
Characteristic
Characteristic
W(ST)
HE
F
SE
IN
and f
osc
DD
= 5V
Min.
Min.
4·25
4·25
4·25
10·6
200
4·6
4·6
2
1
1
1
1
5
Value
Value
Typ.
Typ.
500
3·5
0·7
0·4
30
Max.
Max.
0·75
0·75
5·5
1·5
0·4
0·4
0·4
0·4
50
0·1
7
1
5
mVRMS
Units
V/Rad
Units
mA
mA
MHz
V
V
V
V
V
V
V
V
V
V
V
V
nF
ns
ns
k
k
A
s
s
s
s
s
f
f
I
I
I
I
I
TTL compatible
See note 1
osc
osc
SOURCE
SINK
SINK
SOURCE
SINK
10MHz AC-coupled sinewave
Input squarewave V
See note 4.
See note 2.
See note 3.
, f
, f
See Fig. 6
= 1mA
= 4mA
= 5mA
F
F
IN
IN
= 1mA
= 5mA
= 10MHz
= 1·0MHz
Conditions
Conditions
DD
0 to 5V
square
wave
to V
SS
,