mc88915 Integrated Device Technology, mc88915 Datasheet - Page 2

• Manufacturer Part Number: mc88915
• Description: Low Skew Cmos Pll Clock Driver
• Manufacturer: Integrated Device Technology

IDT™ / ICS™ CMOS PLL CLOCK DRIVERS
MC88915
LOW SKEW CMOS PLL CLOCK DRIVERS
Table 1. Pin Summary
FEEDBACK
FREQ_SEL
V
Pin Name
REF_SEL
SYNC[0]
SYNC[1]
PLL_EN
CC
Q(0–4)
LOCK
2x_Q
RC1
RST
Q/2
Q5
, GND
Number
11
1
1
1
1
1
1
5
1
1
1
1
1
1
FEEDBACK
REF_SEL
GND(AN)
SYNC[0]
SYNC[1]
V
CC
(AN)
RC1
Figure 1. Pinout: 28-Lead PLCC (Top View)
Output
Output
Output
Output
Output
Input
Input
Input
Input
Input
Input
Input
Input
I/O
FREQ_SEL GND Q0 V
5
6
7
8
9
10
11
RST V
12
4
13 14 15 16
3
CC
Reference clock input
Reference clock input
Chooses reference between SYNC[0] and SYNC[1]
Selects Q output frequency
Feedback input to phase detector
Input for external RC network
Clock output (locked to SYNC)
Inverse of clock output
2 x clock output (Q) frequency (synchronous)
Clock output (Q) frequency ÷ 2 (synchronous)
Indicates phase lock has been achieved (high when locked)
Asynchronous reset (active low)
Disables phase-lock for low frequency testing
Power and ground pins (note pins 8 and 10 are “quiet” supply pins
for internal logic only)
Q5 GND Q4 V
2
1
CC
2
28 27 26
Q1 GND PLL_EN
17 18
CC
2X_Q
25
24
23
22
21
20
19
Q/2
GND
Q3
V
Q2
GND
LOCK
CC
Function
MC88915 REV 6 JULY 10, 2007