cy7b951 Cypress Semiconductor Corporation., cy7b951 Datasheet - Page 7

• Manufacturer Part Number: cy7b951
• Description: Local Area Network Atm Transceiver
• Manufacturer: Cypress Semiconductor Corporation.

Document Number: 38-02010 Rev. *A
AC Test Loads and Waveforms
Switching Characteristics
Notes
f
f
t
t
t
t
t
t
t
t
t
7. Cypress uses constant current (ATE) load configurations and forcing functions. This figure is for reference only.
8. f
9. t
10. The ECL switching threshold is the differential zero crossing (i.e., the place where + and – signals cross).
REF
B
PE
ODC
RF
LOCK
RPWH
RPWL
DV
DH
PD
B
LOCK
Parameter
is calculated as 1/(f
is the time needed for transitioning from lock to REFCLK X8 to lock to data.
(a) TTL AC Test Load
(c) TTL Input Test Waveform
Reference Frequency
Bit Time
Receiver Static Phase Error
Output Duty Cycle (TCLK±, RCLK±)
Output Rise/Fall Time
PLL Lock Time (RIN transition density 25%)
REFCLK Pulse Width HIGH
REFCLK Pulse Width HIGH
Data Valid
Data Hold
Propagation Delay (RIN to ROUT, TSER to TOUT)
REF
X8).
[8]
Over the Operating Range
[7]
[6]
Description
[6]
[6]
MODE = LOW
MODE = HIGH
MODE = LOW
MODE = HIGH
MODE = LOW
MODE = HIGH
[9]
[10]
(d) ECL Input Test Waveform
(b) ECL AC Test Load
19.24
Min.
6.41
19.5
6.50
0.4
48
10
10
3
1
[7]
19.64
Max.
6.55
19.1
6.40
100
200
100
1.2
52
10
CY7B951
Page 7 of 10
MHz
MHz
Unit
ns
ns
ps
ps
ns
µs
ns
ns
ns
ns
ns
%
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