U3745BM Datasheet, PDF (27/29 Pages) ATMEL Corporation – UHF ASK RECEIVER IC

U3745BM
Electrical Characteristics
All parameters refer to GND, V_S = 5 V, T_amb = 25°C, f₀ = 433.92 MHz and f₀ = 315 MHz, unless otherwise specified. The
possible operating range refer to different circuit conditions: V_S = 4.5 V to 5.5 V, T_amb = -40°C to +85°C
6.76438-Mhz Osc.
(Mode 1)
4.90625-Mhz Osc.
(Mode 0)
Variable Oscillator
Parameter
Test Condition
Symbol
Min.
Typ. Max. Min. Typ.
Max. Min.
Typ.
Max. Unit
Programming
start pulse
(Figure 16,
Figure 19)
BR_Range0
BR_Range1
BR_Range2
BR_Range3
after POR
t1
2188
1104
561
290
11656
3176 2155
3176 1087
3176 553
3176 286
11479
3128
3128
3128
3128
1057 ´
T_Clk
533 ´
T_Clk
271 ´
T_Clk
140 ´
T_Clk
5632 ´
T_Clk
1535 ´ µs
T_Clk
1535 ´
T_Clk
1535 ´
T_Clk
1535 ´
T_Clk
Programming
delay period
(Figure 16,
Figure 19)
Synchroni-
zation pulse
(Figure 16,
Figure 19)
Delay until the
program
window starts
(Figure 16,
Figure 19)
Programming
window
(Figure 16,
Figure 19)
Time frame
of a bit
(Figure 19)
Programming
pulse (Figure
16, Figure 19)
Equivalent
acknowledge
pulse: E_Ack
(Figure 19)
Equivalent
time window
(Figure 19)
OFF-bit
programming
window
(Figure 16)
t2
795
798 783
786 384.5 ´
T_Clk
385.5 ´ µs
T_Clk
t3
265
261
128 ´ T_Clk
µs
t4
131
129
63.5 ´ T_Clk
µs
t5
530
522
256 ´ T_Clk
µs
t6
1060
1044
512 ´ T_Clk
µs
t7
133
529 131
521 64 ´ T_Clk
256 ´ µs
T_Clk
t8
265
261
128 ´ T_Clk
µs
t9
534
526
t10
930
916
258 ´ T_Clk
µs
449.5 ´ T_Clk
µs
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4663A–RKE–06/03