CY7B952
Document Number: 38-02018 Rev. *E Page 7 of 16
Maximum Ratings
Exceeding maximum ratings
[1]
may shorten the useful life of the
device. These user guidelines are not tested.
Storage Temperature 65 C to +150 C
Ambient Temperature with
Power Applied 55 C to +125 C
Supply Voltage to Ground Potential  0.5 V to +7.0 V
DC Input Voltage  0.5 V to +7.0 V
Output Current into TTL Outputs (LOW) .................... 30 mA
Output Current into ECL Outputs (HIGH) 50 mA
Static Discharge Voltage
(per MIL-STD-883, Method 3015) ........................... >2001 V
Latch-up Current ..................................................... >200 mA
Operating Range
Range Ambient Temperature
[2]
V
CC
Commercial 0 C to +70 C5 V 10%
Electrical Characteristics
Over the Operating Range
Parameter Description Test Condition Min Max Unit
TTL-compatible Input Pins (LOOP, REFCLK+, REFCLK–)
V
IHT
Input HIGH Voltage 2.0 V
CC
V
V
ILT
Input LOW Voltage 0.5 0.8 V
I
IHT
Input HIGH Current REFCLK V
IN
= V
CC
+0.5 +200 A
I
IHT
Input HIGH Current LOOP V
IN
= V
CC
10 +10 A
I
ILT
Input LOW Current REFCLK V
IN
= 0.0 V 50 +50 A
I
ILT
Input LOW Current LOOP V
IN
= 0.0 V 500 A
TTL Compatible Output Pins (LFI)
V
OHT
Output HIGH Voltage I
OH
= –2 mA 2.4 V
V
OLT
Output LOW Voltage I
OL
= 4 mA 0.45 V
I
OST
Output Short Circuit Current V
OUT
= 0 V
[3]
15 90 mA
ECL Compatible Input Pins (REFCLK, CD, TSER, RIN)
I
IHE
ECL Input HIGH Current REFCLK/CD V
IN
= V
IHE(MAX)
+250 A
TSER/RIN V
IN
= V
IHE(MAX)
+750 A
I
ILE
[4]
ECL Input LOW Current REFCLK/CD V
IN
= V
ILE(MIN)
+0.5 A
TSER/RIN V
IN
= V
ILE(MIN)
200 A
V
IDIFF
Input Differential Voltage TSER/RIN 50 1200 mV
REFCLK 100 1200 mV
V
IHE
Input High Voltage TSER/RIN V
CC
V
REFCLK 3.0 V
CC
V
CD V
CC
1.165 V
CC
V
V
ILE
Input LOW Voltage TSER/RIN 2.0 V
REFCLK 2.5 V
CD (ECL) 2.5 V
CC
1.475 V
CD (Disable) 0.5 0.8 V
Notes
1. Single Power Supply: The voltage on any input or I/O pin cannot exceed the power pin during power-up.
2. T
A
is the “instant on” case temperature.
3. Tested one output at a time, output shorted for less than one second, less than 10% duty cycle.
4. Input currents are always positive at all voltages above V
CC
/2.
[+] Feedback
CY7B952
Document Number: 38-02018 Rev. *E Page 8 of 16
ECL Compatible Output Pins (ROUT, RCLK, RSER, TOUT, TCLK)
V
OHE
ECL Output HIGH Voltage V
CC
1.03 V
CC
0.83 V
V
OLE
ECL Output LOW Voltage T > 0 °C V
CC
1.86 V
CC
1.62 V
V
ODIFF
Output Differential Voltage 0.6 V
Three-Level Input Pins (MODE)
V
IHH
Three-Level Input HIGH V
CC
0.75 V
CC
V
V
IMM
Three-Level Input MID V
CC
/2 0.5 V
CC
/2 + 0.5 V
V
ILL
Three-Level Input LOW 0.0 0.75 V
Operating Current
[5]
I
CCS
Static Operating Current 38 mA
I
CCR
Receiver Operating Current 50 mA
I
CCT
Transmitter Operating Current 13 mA
I
CCE
ECL Pair Operating Current 7.0 mA
I
CC5
Additional Current at 51.84 MHz 7.0 mA
I
CCO
Additional Current LFI = LOW 3 mA
Electrical Characteristics (continued)
Over the Operating Range
Parameter Description Test Condition Min Max Unit
Note
5. Total Receiver operating current (assuming that the Transmitter is not activated) can be found by adding I
CCS
+ I
CCR
+ x × I
CCE
; where x is 2 if the ROUT outputs
are not activated and 3 if they are activated. Total Transmitter operating current (assuming that the Receiver is not activated) can be found by adding I
CCS
+ I
CCT
+
x × I
CCE
; where x is 1 if the TOUT outputs are not activated and 2 if they are activated. Total device power (assuming that the Transmitter and the Receiver are
activated) can be found by adding I
CCS
+ I
CCR
+ I
CCT
+ x × I
CCE
; where x represents the number of ECL output pairs activated.
[+] Feedback
CY7B952
Document Number: 38-02018 Rev. *E Page 9 of 16
Capacitance
Parameter
[6]
Description Test Conditions Max Unit
C
IN
Input Capacitance T
A
= 25 C, f
0
= 1 MHz, V
CC
= 5.0 V 10 pF
AC Test Loads and Waveforms
Figure 2. AC Test Loads and Waveforms
2.0V
1.0V
3.0V
GND
2.0V
1.0V
5V
OUTPUT
(a) TTL AC Test Load (b) ECL AC Test Load
<1ns <1ns
80%
20%
80%
20%
<1ns <1ns
(c) TTL Input Test Waveform
(d) ECL Input Test Waveform
R1
R2
C
L
C
L
R
L
R1=910
R2=510
C
L
<30pF
(Includes fixture and
probe capacitance)
R
L
=50
C
L
<5pF
(Includes fixture and
probe capacitance)
V
IHE
3.0V
V
CC
–2
V
IHE
V
ILE
V
ILE
[7]
[7]
[+] Feedback

CY7B952-SXCT

Mfr. #:
Manufacturer:
Cypress Semiconductor
Description:
Telecom Interface ICs BELCORE SONETSDH COM ATM OC 1/3 Clk Rcvry
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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