t4225b ATMEL Corporation, t4225b Datasheet - Page 7

• Manufacturer Part Number: t4225b
• Description: Low-cost Time-code Receiver
• Manufacturer: ATMEL Corporation

Rev. A3, 03-Dec-98
Decoding characteristics
for typical fieldstrentgh
1 mV/m
Power- ON/OFF control; PON
Input voltage
Input current
Set-up time after PON
AGC hold mode; SL
Input voltage
Input current
Rejection of interference
signals
HIGH
LOW
HIGH
LOW
Parameters
WWVBbased on the values of
the application circuit fig. 21:
TCO pulse width 200 ms
TCO pulse width 500 ms
TCO pulse width 800 ms
Delay compared with the
transient of the RF signal:
drop down (start transition)
rise (end transition)
JG2AS based on the values of
the application circuit fig. 22:
TCO pulse width 200 ms
TCO pulse width 500 ms
TCO pulse width 800 ms
Delay compared with the
transient of the RF signal:
start transition (RF on)
end transition (RF off)
Required I
V
V
V
Required I
V
V
V
using 2 crystal filters
using 1 crystal filter
f
in
in
CC
CC
CC
d
d
Pad SL
= 3
– f
= V
= GND
Pad PON
= 3 V
= 1.5 V
= 5 V
Test Conditions / Pin
ud
m
CC
V, f
= 625 Hz
IN
IN
d
y
y
= 77.5 kHz
0.5
0.5
m
m
A
A
Symbol
t
t
t
t
t
t
I
200
500
800
200
500
800
a
a
t
t
t
t
IN
t
e
e
s
s
f
f
V
V
CC
CC
Min.
140
440
740
240
420
720
1.4
45
20
10
30
- 0.2
- 0.2
Typ.
1.7
0.7
0.5
2.5
43
22
3
T4225B
V
V
CC
CC
Max.
200
500
800
410
490
790
110
220
0.1
80
45
2
2
- 1.2
- 1.2
Unit
7 (16)
m
m
m
m
m
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
dB
dB
V
V
V
V
s
A
A
A
A
A