CY7B923-400JI CYPRESS [Cypress Semiconductor], CY7B923-400JI Datasheet - Page 10

• Manufacturer Part Number: CY7B923-400JI
• Manufacturer: CYPRESS [Cypress Semiconductor]

Receiver Switching Characteristics
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
Notes:
Parameter
15. The period of t
16. Receiver t
17. Data includes Q
18. t
19. REFCLK has no phase or frequency relationship with CKR and only acts as a centering reference to reduce clock synchronization time. REFCLK must be
20. The PECL switching threshold is the midpoint between the PECL V
21. Static alignment is a measure of the alignment of the Receiver sampling point to the center of a bit. Static alignment is measured by sliding one bit edge in
22. Error Free Window is a measure of the time window between bit centers where a transition may occur without causing a bit sampling error. EFW is measured
CKR
B
CPRH
CPRL
RH
PRF
PRH
A
ROH
H
CKX
CPXH
CPXL
DS
SA
EFW
above.
within 0.1% of the transmitter CKW frequency, necessitating a 500-PPM crystal.
3,000 nominal transitions until a byte error occurs.
over the operating range, input jitter 50% Dj.
A
, t
ROH
, and t
B
is calculated as t
Read Clock Period (No Serial Data Input), REFCLK
as Reference
Bit Time
Read Clock Pulse HIGH
Read Clock Pulse LOW
RDY Hold Time
RDY Pulse Fall to CKR Rise
RDY Pulse Width HIGH
Data Access Time
Data Hold Time
Data Hold Time from CKR Rise
REFCLK Clock Period Referenced to CKW of
Transmitter
REFCLK Clock Pulse HIGH
REFCLK Clock Pulse LOW
Propagation Delay SI to SO (note PECL and TTL
thresholds)
Static Alignment
Error Free Window
H
specifications are only valid if all outputs (CKR, RDY, Q
CKR
0 7
will match the period of the transmitter CKW when the receiver is receiving serial data. When data is interrupted, CKR may drift to one of the range limits
, SC/D, and RVS.
[16]
[19]
[20]
CKR
[15]
/10 if no data is being received, or t
[17, 18]
[7, 21]
[17, 18]
[7, 22]
Description
[17, 18]
Over the Operating Range
CKW
0 7
/10 if data is being received. See note.
, SC/D, and RVS) are loaded with similar DC and AC loads.
OH
, and V
10
OL
specification (approximately V
t
t
5t
5t
5t
4t
2t
2t
0.9t
7B933-155
Min.
6.25
B
B
6.5
6.5
[1]
0.1
B
B
B
B
B
B
1
2.5
2.5
B
3
3
3
3
2
3
+0.1
Max
6.67
2t
100
+1
20
4
B
+
t
t
5t
5t
5t
4t
2t
2t
0.9t
Min.
B
B
3.03
6.5
6.5
0.1
B
B
B
B
B
B
1
2.5
2.5
CC
7B933
B
3
3
3
3
2
3
1.35V). The TTL switching threshold is 1.5V.
2t
Max.
+0.1
6.25
100
+1
20
B
+4
t
t
5t
5t
5t
4t
2t
2t
0.9t
Min.
B
B
2.5
6.5
6.5
7B933-400
0.1
B
B
B
B
B
B
1
2.5
2.5
B
3
3
3
3
2
3
CY7B923
CY7B933
2t
Max.
+0.1
6.25
100
+1
20
B
+4
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ps
%
%