SCAS844 Data sheet

SCAS844H August 2007 – July 2025 CDCE949 , CDCEL949

PRODUCTION DATA

Package Options

Mechanical Data (Package|Pins)

PW|24
- MPDS363A

Thermal pad, mechanical data (Package|Pins)

Orderable Information

5.5 Electrical Characteristics

over recommended operating free-air temperature range (unless otherwise noted)

PARAMETER		TEST CONDITIONS		MIN	TYP⁽¹⁾	MAX	UNIT
I_DD	Supply current (see Figure 5-1)	All outputs off, f_CLK = 27MHz, f_VCO= 135MHz	All PLLs on		38		mA
I_DD	Supply current (see Figure 5-1)	All outputs off, f_CLK = 27MHz, f_VCO= 135MHz	Per PLL		9		mA
I_DD(OUT)	Supply current (see Figure 5-2 and Figure 5-3)	No load, all outputs on, f_out = 27MHz	CDCE949 V_DDOUT = 3.3V		4		mA
I_DD(OUT)	Supply current (see Figure 5-2 and Figure 5-3)	No load, all outputs on, f_out = 27MHz	CDCEL949 V_DDOUT = 1.8V		2		mA
I_DD(PD)	Power down current	Every circuit powered down except SDA/SCL, f_IN = 0MHz, V_DD = 1.9V			50		µA
V_(PUC)	Supply voltage V_DD threshold for power up control circuit			0.85		1.45	V
f_VCO	VCO frequency range of PLL			80		230	MHz
f_OUT	LVCMOS output frequency			230			MHz
LVCMOS
V_IK	LVCMOS input voltage	V_DD = 1.7V, I_I = –18mA				–1.2	V
I_I	LVCMOS input current	V_I = 0V or V_DD, V_DD = 1.9V				±5	µA
I_IH	LVCMOS input current for S0/S1/S2	V_I = V_DD, V_DD = 1.9V				5	µA
I_IL	LVCMOS input current for S0/S1/S2	V_I = 0V, V_DD = 1.9V				–4	µA
C_I	Input capacitance at Xin/Clk	V_ICLK = 0V or V_DD			6		pF
	Input capacitance at Xout	V_IXout = 0V or V_DD			2
	Input capacitance at S0/S1/S2	V_IS = 0V or V_DD			3
CDCE949 – LVCMOS FOR V_DDOUT = 3.3V
V_OH	LVCMOS high-level output voltage	V_DDOUT = 3V, I_OH = –0.1mA		2.9			V
		V_DDOUT = 3V, I_OH = –8mA		2.4
		V_DDOUT = 3V, I_OH = –12mA		2.2
V_OL	LVCMOS low-level output voltage	V_DDOUT = 3V, I_OL = 0.1mA				0.1	V
		V_DDOUT = 3V, I_OL = 8mA				0.5
		V_DDOUT = 3V, I_OL = 12mA				0.8
t_PLH, t_PHL	Propagation delay	PLL bypass			3.2		ns
t_r/t_f	Rise and fall time	V_DDOUT = 3.3V (20%–80%)			0.6		ns
t_jit(cc)	Cycle-to-cycle jitter⁽²⁾⁽³⁾	1 PLL switching, Y2-to-Y3			60	90	ps
t_jit(cc)	Cycle-to-cycle jitter⁽²⁾⁽³⁾	4 PLLs switching, Y2-to-Y9			120	170	ps
t_jit(per)	Peak-to-peak period jitter⁽²⁾⁽³⁾	1 PLL switching, Y2-to-Y3			70	100	ps
t_jit(per)	Peak-to-peak period jitter⁽²⁾⁽³⁾	4 PLLs switching, Y2-to-Y9			130	180	ps
t_sk(o)	Output skew⁽⁴⁾	f_OUT = 50MHz, Y1-to-Y3				60	ps
t_sk(o)	Output skew⁽⁴⁾	f_OUT = 50MHz, Y2-to-Y5 or Y6-to-Y9				160	ps
odc	Output duty cycle⁽⁵⁾	f_VCO = 100MHz, Pdiv = 1		45%		55%
CDCE949 – LVCMOS FOR V_DDOUT = 2.5V
V_OH	LVCMOS high-level output voltage	V_DDOUT = 2.3V, I_OH = –0.1mA		2.2			V
		V_DDOUT = 2.3V, I_OH = –6mA		1.7
		V_DDOUT = 2.3V, I_OH = –10mA		1.6
V_OL	LVCMOS low-level output voltage	V_DDOUT = 2.3V, I_OL = 0.1mA				0.1	V
		V_DDOUT = 2.3V, I_OL = 6mA				0.5
		V_DDOUT = 2.3V, I_OL = 10mA				0.7
t_PLH, t_PHL	Propagation delay	PLL bypass			3.4		ns
t_r/t_f	Rise and fall time	V_DDOUT = 2.5V (20%–80%)			0.8		ns
t_jit(cc)	Cycle-to-cycle jitter⁽²⁾⁽³⁾	1 PLL switching, Y2-to-Y3			60	90	ps
t_jit(cc)	Cycle-to-cycle jitter⁽²⁾⁽³⁾	4 PLLs switching, Y2-to-Y9			120	170
t_jit(per)	Peak-to-peak period jitter⁽²⁾⁽³⁾	1 PLL switching, Y2-to-Y3			70	100	ps
t_jit(per)	Peak-to-peak period jitter⁽²⁾⁽³⁾	4 PLLs switching, Y2-to-Y9			130	180
t_sk(o)	Output skew⁽⁴⁾	f_OUT = 50MHz, Y1-to-Y3				60	ps
t_sk(o)	Output skew⁽⁴⁾	f_OUT = 50MHz, Y2-to-Y5 or Y6-to-Y9				160	ps
odc	Output duty cycle⁽⁵⁾	f_VCO = 100MHz, Pdiv = 1		45%		55%
CDCEL949 – LVCMOS FOR V_DDOUT = 1.8V
V_OH	LVCMOS high-level output voltage	V_DDOUT = 1.7V, I_OH = –0.1mA		1.6			V
		V_DDOUT = 1.7V, I_OH = –4mA		1.4
		V_DDOUT = 1.7V, I_OH = –8mA		1.1
V_OL	LVCMOS low-level output voltage	V_DDOUT = 1.7V, I_OL = 0.1mA				0.1	V
		V_DDOUT = 1.7V, I_OL = 4mA				0.3
		V_DDOUT = 1.7V, I_OL = 8mA				0.6
t_PLH, t_PHL	Propagation delay	PLL bypass			2.6		ns
t_r/t_f	Rise and fall time	V_DDOUT = 1.8V (20%–80%)			0.7		ns
t_jit(cc)	Cycle-to-cycle jitter⁽²⁾⁽³⁾	1 PLL switching, Y2-to-Y3			70	120	ps
t_jit(cc)	Cycle-to-cycle jitter⁽²⁾⁽³⁾	4 PLLs switching, Y2-to-Y9			120	170
t_jit(per)	Peak-to-peak period jitter⁽²⁾⁽³⁾	1 PLL switching, Y2-to-Y3			90	140	ps
t_jit(per)	Peak-to-peak period jitter⁽²⁾⁽³⁾	4 PLLs switching, Y2-to-Y9			130	190
t_sk(o)	Output skew⁽⁴⁾	f_OUT = 50MHz, Y1-to-Y3				60	ps
t_sk(o)	Output skew⁽⁴⁾	f_OUT = 50MHz, Y2-to-Y5 or Y6-to-Y9				160
odc	Output duty cycle⁽⁵⁾	f_VCO = 100MHz, Pdiv = 1		45%		55%
SDA AND SCL
V_IK	SCL and SDA input clamp voltage	V_DD = 1.7V, I_I = –18mA				–1.2	V
I_IH	SCL and SDA input current	V_I = V_DD, V_DD = 1.9V				±10	µA
V_IH	SDA/SCL input high voltage⁽⁶⁾			0.7 × V_DD			V
V_IL	SDA/SCL input low voltage⁽⁶⁾					0.3 × V_DD	V
V_OL	SDA low-level output voltage	I_OL = 3mA, V_DD = 1.7V				0.2 × V_DD	V
C_I	SCL/SDA input capacitance	V_I = 0V or V_DD			3	10	pF

(1) All typical values are at respective nominal V_DD.

(2) 10000 cycles.

(3) Jitter depends on device configuration. Data is taken under the following conditions: 1-PLL: f_IN = 27MHz, Y2/3 = 27MHz, (measured at Y2), 4-PLL: f_IN = 27MHz, Y2/3 = 27MHz, (measured at Y2), Y4/5 = 16.384MHz, Y6/7 = 74.25MHz, Y8/9 = 48MHz.

(4) The t_sk(o) specification is only valid for equal loading of each bank of outputs and outputs are generated from the same divider; data sampled on rising edge (t_r).

(5) odc depends on output rise- and fall-time (t_r/t_f).

(6) SDA and SCL pins are 3.3V tolerant.